- Journal Publications
- Monographs or Authored Books/Chapter in Books
- Selected Conference Papers
- Invited Talks/Seminars

A list of recent technical reports is available on the SBEL Publications page.

## Journal Publications

“A Matrix-Free Newton Krylov Parallel Implicit Implementation of the Absolute Formulation,” D. Melanz, N. Khude, P. Jayakumar, D. Negrut, ASME Journal of Computational and Nonlinear Dynamics, in press, 2013.

“Using Krylov Subspace and Spectral Methods for Solving Compementarity Problems in Many-Body Contacti Dynamics Simulation,” T. Heyn, A. Tasora, M. Anitescu, D. Negrut, International Journal for Numerical Methods in Engineering, in press, 2013.

“Investigating Through Simulation the Mobility of Light Tracked Vehicles Operating on Discrete Granular Terrain,” D. Negrut, D. Melanz, H. Mazhar, D. Lamb, P. Jayakumar and M. Letherwood, SAE Int. JPasseng. Cars - Mech. Syst. 6:369-381;, DOI: 10.4271/2013-01-1191, May 2013.

“Chrono: A Parallel Multi-Physics Library for Rigid-Body, Flexible-Body, and Fluid Dynamics,” H. Mazhar, T. Heyn, A. Pazouki, D. Melanz, A. Seidl, A. Barthlomew, A Tasora, and D. Negrut, Mechanical Sciences, accepted, 2013.

“On the Parallel Sumulation of Large Flexible Body Systems with Multiple Contacts,” N. Khude, D. Melanz, I. Stanciulescu, D. Negrut, accepted, ASME Journal of Computational and Nonlinear Dynamics, 2013.

“A Compliant Visco-Plastic Particle Contact Model based on Differential Variational Inequalities,” A. Tasora, M. Anitescu, S. Negrini, D. Negrut, accepted, International Journal of Nonlinear Mechanics, 2013.

“Leveraging Parallel Computing in Multibody Dynamics,” D. Negrut, A. Tasora, H. Mazhar, T. Heyn, P. Hahn, Multibody System Dynamics, DOI: 10.1007/s11044-011-9262-y, vol. 27, pp. 95-117, 2012.

“A Physics-Based Vehicle/Terrain Interaction Model for Soft Soil Off-Road Vehicle Simulations,” J. Madsen, D. Negrut, A. Reid, A. Seidl, P. Ayers, G. Bozdech, J. Freeman, J. O’Kins, SAE International Journal of Commercial Vehicles, doi:10.4271/2012-01-0767, 2012.

“Parallel collision detection of ellipsoids with applications in large scale multibody dynamics,” A. Pazouki, H. Mazhar, D. Negrut, Mathematics and Computers in Simulation, vol. 82, pp. 879-894, 2012.

“A Co-Simulation Environment for High-Fidelity Virtual Prototyping of Vehicle Systems,” M. Datar, I. Stanciulescu, D. Negrut, International Journal of Vehicle Systems Modeling and Testing, vol. 7, pp. 54-72, 2012.

“An Expeditious High Fidelity ABAQUS-Based Surrogate Tire Model for Full Vehicle Durability Analysis in ADAMS,” H. Ardeh, M. Datar, K. Jagadeesan, D. Negrut, SAE International Journal of Materials and Manufacturing, DOI: 10.4271/2011-01-0187, 2011.

“Reliability Prediction for the HMMWV Suspension System,” D. Ghiocel, D. Negrut, D. Lamb, D. Gorsich, SAE International Journal of Materials and Manufacturing, DOI: 10.4271/2011-01-0726, 2011.

“A Scalable Parallel Method for Large Scale Collision Detection Problems,” H. Mazhar, T. Heyn, D. Negrut, Multibody System Dynamics, pp. 1-19. doi:10.1007/s11044-011-9246-y, vol. 26, pp. 37-55, 2011.

“A Quantitative Assessment of the Potential of Implicit Integration Methods for Molecular Dynamics Simulation,” N. Schafer, D. Negrut, ASME Journal of Computational and Nonlinear Dynamics, Vol, 5(3), doi: 10.1115/1.4001392, 2010.

“Construction and Use of Surrogate Models for the Dynamic Analysis of Multibody Systems,” H. Ansari, M. Tupy, M. Datar, D. Negrut, SAE International Journal of Passenger Cars-Mechanical Systems, Vol. 3(1), pp. 8-20, 2010.“A Framework for Terrain-Induced Uncertainty Quantification in Vehicle Dynamics Simulation,” M. Datar, D. Gorsich, D. Lamb, D. Negrut, International Journal of Vehicle Systems Modeling and Testing, Vol. 4, pp. 234-255, 2009.

“A Discussion of Low Order Numerical Integration Formulas for Rigid and Flexible Multibody Dynamics,” D. Negrut, L. O. Jay, N. Khude, ASME Journal of Computational and Nonlinear Dynamics, Vol. 4(2), doi: 021008.1-021008.11, 2009.

“On the Regularity of Reduced Models Obtained by Quasicontinuum-like Approaches,” M. Anitescu, D. Negrut, P. Zapol, A. El-Azab, Mathematical Programming, Vol. 118(2), pp. 207-236, 2009.

“Efficient Sampling of Dynamical Systems with Spatial Uncertainty,” K. Schmitt, M. Anitescu, D. Negrut, International Journal for Numerical Methods in Engineering, Vol. 80(4), pp. 537-564, 2009.

“Large-Scale Parallel Multi-Body Dynamics with Frictional Contact on the Graphical Processing Unit,” A. Tasora, D. Negrut, M. Anitescu, Proc. IMechE, Part K: Journal Multi-body Dynamics, Vol. 222(4), pp. 315-326, 2008.

“Implicit and Explicit Integration in the Solution of the Absolute Nodal Coordinate Differential/Algebraic Equations,” B. Hussein, D. Negrut, A. Shabana, Nonlinear Dynamics, Vol. 54, pp. 283-296, 2008.

”Quasicontinuum-like reduction of DFT calculations of nanostructures, ” D. Negrut, M. Anitescu, A. El-Azab, P. Zapol, Journal of Nanoscience and Nanotechnology, Vol. 8, pp. 3729-3740, 2008.(pdf)

”Extensions of the HHT-method to differential-algebraic equations in mechanics,” L. O. Jay, D. Negrut, Electronic Transactions on Numerical Analysis, Vol. 26, pp. 190-208, 2007.(pdf)

”On the regularity of reduced models obtained by quasicontinuum-like approaches, ” M. Anitescu, D. Negrut, P. Zapol, A. El-Azab, Mathematical Programming, accepted, 2007.(pdf)

”On an Implementation of the HHT Method in the Context of Index 3 Differential Algebraic Equations of Multibody Dynamics,” D. Negrut, R. Rampalli, G. Ottarsson, and A. Sajdak, ASME Journal of Computational and Nonlinear Dynamics, Vol. 2, No. 1, pp. 73-85, 2007. (pdf)

”A Practical Approach for the Linearization of the Constrained Multibody Dynamics Equations,” D. Negrut, and J. Ortiz, ASME Journal of Computational and Nonlinear Dynamics, Vol.1, Issue 3, pp.230-239, 2006. (pdf)

”A Rosenbrock-Nystrom State Space Implicit Approach for the Dynamic Analysis of Mechanical Systems: I – Theoretical Formulation,” A. Sandu, D. Negrut, E. Haug, F. Potra and C. Sandu, Journal of Multi-body Dynamics, Vol. 217, No. 4, pp. 263-271(9), 2003. (pdf)

”A Rosenbrock-Nystrom State Space Implicit Approach for the Dynamic Analysis of Mechanical Systems: II – The Method and Numerical Examples,” D. Negrut, A. Sandu, E. Haug, F. Potra and C. Sandu, Journal of Multi-body Dynamics, Vol. 217, No. 4, pp. 273-281(9), 2003. (pdf)

“Linear algebra considerations for the multi-threaded simulation of mechanical systems,” D. Negrut, Multibody System Dynamics, Vol. 10, No. 1, pp.61-80, 2003. (pdf)

”An Implicit Runge-Kutta Method for the Integration of Differential-Algebraic Equations of Multibody Dynamics,” D. Negrut, E.J. Haug and H.C. German, Multibody System Dynamics, Vol. 9, No.2, pp.121-142, 2003. (pdf)

”Numerical Methods for High-Speed Vehicle Dynamic Simulation,” E. J. Haug, D. Negrut, R. Serban and D. Solis, Mechanics of Structures and Machines, Vol. 27(4), 1999. (pdf)

”Implicit Runge-Kutta Integration of the Equations of Multibody Dynamics in Descriptor Form,” E. Haug, D. Negrut and C. Engstler, Mechanics of Structures and Machines, Vol. 27(3), 1999. (pdf)

”A State-Space Based Implicit Integration Algorithm for Differential-Algebraic Equations of Multibody Dynamics,” E. Haug, D. Negrut and M. Iancu, Mechanics of Structures and Machines, Vol. 25(3), 1997. (pdf)

”A Topology Based Approach for Exploiting Sparsity in Multibody Dynamics. The Cartesian Formulation,” R. Serban, D. Negrut, F.A. Potra, and E.J. Haug, Mechanics of Structures and Machines, Vol. 25(3), 1997. (pdf)

”A Topology Based Approach for Exploiting Sparsity in Multibody Dynamics. The Joint Formulation,” D. Negrut, R. Serban, F.A. Potra, and E.J. Haug, Mechanics of Structures and Machines, Vol. 25(2), 1997. (pdf)

Monographs or Authored Books

"An Introduction to Parallel Computing", in Progress, Negrut is sole author.

Chapters in Books

“Solving Large Multi-Body Dynamics Problems on the GPU,” D. Negrut, A. Tasora, M. Anitescu, H. Mazhar, T. Heyn, A. Pazouki, accepted, book chapter in GPU Gems 4, 2011.

“GPU-based Parallel Computing for the Simulation of Complex Multibody Systems with Unilateral and Bilateral Constraints: An Overview,” A. Tasora, D. Negrut, M. Anitescu in Springer-Verlag’s “Multibody Dynamics: Computational Methods and Applications,” W. Blajer, K. Arczewski, J. Fraczek, and M. Wojtyra (eds.), pp. 283-327, 2011.

“A Second Order Extension of the Generalized-Alpha Method for Constrained Systems in Mechanics,” L. O. Jay, D. Negrut, in Springer-Verlag’s “Multibody Dynamics: Computational Methods and Applications,” series, C. Bottasso editor, pp. 143-158, 2008.

Selected Conference Papers

“Compaction-Based Deformable Terrain Model as an Interface for Real-Time Vehicle Dynamics Simulations 13M-0241,” J. Madsen, A. Seidl, D. Negrut, 2013, SAE World Congress April 2013, Detroit, MI

“Chrono::Terrain - Off-Road Vehicle Dynamics Simulation with a Compaction Based Deformable Terrain Model,” J. Madsen, A. Seidl, D. Negrut, ECCOMAS Thematic Conference on Multibody Dynamics, Croatia, July 1-4, 2013, Zagreb, Croatia

“A Differential Variational Inequality Approach for Modeling Frictional Contact-Impact between Flexible Bodies,” N. Khude, D. Negrut, ECCOMAS Thematic Conference on Multibody Dynamics, July 1-4, 2013, Zagreb, Croatia

“Chrono: A Parallel Multi-Physics Library for Rigid-Body, Flexible-Body, and Fluid Dynamics,” T. Heyn, H. Mazhar, A. Pazouki, D. Melanz, A. Seidl, A. Bartholomew, L. Fang, A. Tasora, E. Sifakis, D. Negrut, ECCOMAS Thematic Conference on Multibody Dynamics, July 1-4, 2013, Zagreb, Croatia

“A Lagrangian-Lagrangian framework for the simulation of fluid/rigid-body interaction,” A. Pazouki, D. Negrut, ECCOMAS Thematic Conference on Multibody Dynamics, July 1-4, 2013, Zagreb, Croatia

“Off-Road Vehicle Dynamics Mobility Simulation with a Compaction Based Deformable Terrain Model, DETC2013-13152,” J. Madsen, D. Negrut, A. Seidl, 9th International Conference on Multibody Systems, Nonlinear Dynamics, and Control (MSNDC) at the ASME International Design Engineering Technical Conferences (IDETC) and Computers and Information in Engineering Conference (CIE), August 4-7, 2013, Portland, OR

“On Some Properties of the Mechanical Topology that Affect Parallel Solvers, DETC2013-13201,” A. Tasora, D. Negrut, 9th International Conference on Multibody Systems, Nonlinear Dynamics, and Control (MSNDC) at the ASME International Design Engineering Technical Conferences (IDETC) and Computers and Information in Engineering Conference (CIE), August 4-7, 2013, Portland, OR

“Chrono: A Parallel Physics Library for Rigid-Body, Flexible-Body, and Fluid Dynamics, DETC2013-13239,” T. Heyn, H. Mazhar, A. Pazouki, D. Melanz, A. Seidl, J. Madsen, A. Bartholomew, D. Lamb, A. Tasora, D. Negrut, 9th International Conference on Multibody Systems, Nonlinear Dynamics, and Control (MSNDC) at the ASME International Design Engineering Technical Conferences (IDETC) and Computers and Information in Engineering Conference (CIE), August 4-7, 2013, Portland, OR

“GPU-Based Algorithm for Fast Computation of Cartilage Contact Patterns During Simulations of Movement,” K. W. Choi, D. Negrut, D. G. Thelen, ASME 2013 Summer Bioengineering Conference, June 26-29 2013, Sunriver, OR

“On the Numerical Solution of Many-Body Contact Dynamics Problems Formulated as Complementarity Problems,” T. Heyn, D. Negrut, M. Anitescu, A. Tasora, D. Lamb, ASME 2012 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference, August 12-15 2012, Chicago, IL

“Granular Dynamics Simulation on Multiple GPUs Using Domain Decomposition,” H. Mazhar, A. Seidl, R. Shotwell, M. Quadrelli, A. Jain, D. Negrut, ASME 2012 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference, August 12-15 2012, Chicago, IL

“A GPU Parallelization of the Absolute Nodal Coordinate Formulation for Applications in Flexible Multibody Dynamics,” D. Melanz, N. Khude, P. Jayakumar, M. Letherwood, D. Negrut, ASME 2012 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference (IDETC), August 12-15 2012, Chicago, IL

“A High-Performance Computing approach to the Simulation of Dense Particulate Flow Using Smoothed Particle Hydrodynamics and Discrete Element Method,” A. Pazouki and D. Negrut, Proceedings of the 6th Asian Conference on Multibody Dynamics, August 2012, Shanghai, China.

“Direct Simulation of Lateral Migration of Buoyant Particles in Channel Flow Using GPU Computing,” A. Pazouki and D. Negrut, Proceedings of the 32nd Computers and Information in Engineering Conference, ASME-IDETC, August 2012, Chicago, Illinois.

“Modeling and Simulation of Anchoring Processes for Small Body Exploration,” M. Quadrelli, H. Mazhar, D. Negrut, AIAA SPACE 2012 Conference & Exposition, September 11 - 13 2012, Pasadena, CA

“A Physics-Based Terrain Model for Off-Road Vehicle Simulations,” J. Madsen, A. Seidl, P. Ayers, G. Bozdech, D. Negrut, A. Reid, J. O'Kins. ASME IDETC, Aug. 13-15 2012, Chicago, IL.

“Investigating the Mobility of Light Autonomous Tracked Vehicles Using a High Performance Computing Simulation Capability,” D. Negrut, H. Mazhar, D. Melanz, D. Lamb, P. Jayakumar, M. Letherwood, A. Jain, M. Quadrelli, Ground Vehicle Systems Engineering and Technology Symposium (GVSETS), August 14-16 2012, Troy, MI

“Efficient Modeling of Frictional Contacts with Absolute Nodal Coordinate Formulation and the Parallel GPU Implementation for Simulation of Large Systems with Flexible Bodies,” N. Khude, D. Melanz, J. Madsen, D. Negrut, Second Joint International Conference on Multibody System Dynamics, Stuttgart, Germany, May 2012

“Enabling Computational Dynamics in Distributed Computing Environments Using a Heterogeneous Computing Template,” H. Mazhar, T. Heyn, A. Seidl, S. O’Rourke, A. Tasora, D. Negrut, Second Joint International Conference on Multibody System Dynamics, Stuttgart, Germany, May 2012

“A Compliant Contact Model Based on Differential Variational Inequalities,” A. Tasora, D. Negrut, S. Negrini, Second Joint International Conference on Multibody System Dynamics, Stuttgart, Germany, May 2012

“On the Numerical Solution of Many-Body Dynamics Problems Formulated as Complementarity Problems,” T. Heyn, M. Anitescu, A. Tasora, D. Negrut, Second Joint International Conference on Multibody System Dynamics, Stuttgart, Germany, May 2012

“Using a Granular Dynamics Code to Investigate the Performance of a Helical Anchoring System Design,” H. Mazhar, M. Quadrelli, T. Heyn, J. Madsen, D. Negrut, The 13th Biennial ASCE Aerospace Division International Conference - Engineering, Construction and Operations in Challenging Environments (EARTH & SPACE 2012), April 2012, Pasadena, CA

“Enabling Computational Dynamics in Distributed Computing Environments Using a Heterogeneous Computing Template,” D. Negrut, Heyn, T., A. Seidl, D. Melanz, D. Gorsich, D. Lamb. NDIA Ground Vehicle Systems Engineering and Technology Symposium, August 2011: Dearborn, MI.

“On a Methodology to Handle Contact between Flexible Bodies and the Use of Parallel GPU Computing for the Simulation of Large Flexible Body Systems,” N. Khude, D. Melanz, I. Stanciulescu, and D. Negrut. ASME 2011 International Design Engineering Technical Conferences (IDETC) and Computers and Information in Engineering Conference (CIE), August 2011: Washington, DC.

“Enabling Computational Dynamics in Distributed Computing Environments using a Heterogeneous Computing Template,” Heyn, T., A. Seidl, H. Mazhar, D. Lamb, A. Tasora, and D. Negrut. ASME 2011 International Design Engineering Technical Conferences (IDETC) and Computers and Information in Engineering Conference (CIE), August 2011: Washington, DC.

“A Parallel GPU Implementation of the Absolute Nodal Coordinate Formulation with a Frictional/Contact Model for the Simulation of Large Flexible Body Systems,” Khude, N., D. Melanz, I. Stanciulescu, and D. Negrut. ECCOMAS Multibody Dynamics Thematic Conference. July 2011: Brussels, Belgium.

“Enabling Computational Dynamics in Distributed Computing Environments using a Heterogeneous Computing Template,” Heyn, T., A. Seidl, H. Mazhar, M. Tupy, A. Tasora, and D. Negrut. ECCOMAS Multibody Dynamics Thematic Conference. July 2011: Brussels, Belgium.

“Constructing an Expeditious High Fidelity ABAQUS-Based Surrogate Tire Model for Full Vehicle Durability Analysis in ADAMS Using the Instantaneous Center Manifold Theory,” H. A. Ardeh, M. Datar, M. Kangayamjaga, D. Negrut. ECCOMAS Multibody Dynamics Thematic Conference. July 2011: Brussels, Belgium.

“A high-performance computing framework for physics-based modeling and simulation of the mobility of military ground vehicles,” D. Negrut, D. Lamb, D. Gorsich, Modeling and Simulation for Defense Systems and Applications, SPIE Conference, Orlando FL, 2011

“Advanced Reliability Prediction for HMMWV Suspension System,” Paper 11IDM-0093/2011-01-0726, D. Ghiocel, D. Negrut, D. Lamb, D. Gorsich, SAE 2011 World Congress and Exhibition Detroit, MI, 2011

“An Expeditious High Fidelity ABAQUS-Based Surrogate Tire Model for Full Vehicle Durability Analysis in ADAMS,” Paper 11M-0060/2011-01-0187, H. A. Ardeh, M. Datar, M. Kumar, Dan Negrut, SAE 2011 World Congress and Exhibition Detroit, MI, 2011

“Large Scale Computational Dynamics on Next Generation Heterogeneous Clusters using DDEP,” A. Seidl, H. Mazhar, T. Heyn, D. Negrut, accepted, SIAM Conference on Computational Science and Engineering, Reno, NV, 2011.

“Million Body Simulations of Granular Dynamics on the GPU,” H. Mazhar, T. Heyn, A. Tasora, M. Anitescu, D. Negrut, accepted, SIAM Conference on Computational Science and Engineering, Reno, NV, 2011.

“A Scalable Parallel Method for Large Scale Collision Detection Problems,” D. Negrut, H. Mazhar, T. Heyn, 14th SIAM Conference on Parallel Processing for Scientific Computing, Seattle, WA, 2010.

“Enabling Heterogeneous High-Performance Computing for Addressing Modeling, Simulation and Visualization Needs in Large Scale Computational Dynamics,” D. Negrut, D. Lamb, D. Gorsich, 27th Army Science Conference, Orlando, FL, 2010.

“Application of an Integrated HPC Reliability Prediction Framework to HMMWV Suspension System,” D. Lamb, D. Gorsich, D. Ghiocel, D. Negrut, in 27th Army Science Conference, Orlando, FL, 2010.

“Simulation of Massive Multibody Systems using GPU Parallel Computation,” A. Tasora, D. Negrut, M. Anitescu, H. Mazhar, T. Heyn, Proceedings of the 18th International Conf. in Central Europe on Computer Graphics, Visualization and Computer Vision, Plzen, Czech Republic, 2010.

“Parallel Ellipsoid Collision Detection with Application in Contact Dynamics DETC2010-29073,” A. Pazouki, H. Mazhar, D. Negrut, ASME International Design Engineering Technical Conferences (IDETC) and Computers and Information in Engineering Conference (CIE), Montreal, Canada, 2010.

“On the Validation of a Differential Variational Inequality Approach for the Dynamics of Granular Material DETC2010-28804,” D. Melanz, M. Tupy, B. Smith, K. Turner, D. Negrut, ASME International Design Engineering Technical Conferences (IDETC) and Computers and Information in Engineering Conference (CIE), Montreal, Canada, 2010.

“Advances in High Performance Computing for Physical Simulations,” A. Tasora, D. Negrut, 1st Joint International Conference on Multibody System Dynamics, Lappeenranta, Finland, 2010.

“On the use of Smoothed Particle Hydrodynamics (SPH) in Acoustic simulations,” P. Hahn, D. Negrut,” 1st Joint International Conference on Multibody System Dynamics, Lappeenranta, Finland, 2010.

“Efficient Sampling Methods for Spatial Uncertainty in Multibody Dynamics Applications,” K. Schmitt, M. Anitescu, D. Negrut, 1st Joint International Conference on Multibody System Dynamics, Lappeenranta, Finland, 2010.

“A Scalable Parallel Method for Large Scale Collision Detection Problems,” H. Mazhar, D. Negrut, A. Pazouki, A. Tasora, 5th Asian Conference on Multibody Dynamics (ACMD2010), Kyoto, Japan, 2010.

“GPU-based High Performance Parallel Simulation of Tracked Vehicle Operating on Granular Terrain,” J. Madsen, T. Heyn, D. Negrut, D. Lamb, SAE 2010 World Congress and Exhibition Detroit, MI, 2010.

“A Stochastic Approach to Integrated Vehicle Reliability Prediction DETC2009-87487,” J. Madsen, D. Ghiocel, D. Gorsich, D. Lamb, D. Negrut, ASME IDETC Conference, San Diego, CA, 2009.

“A Parallel Algorithm for Solving Complex Multibody Problems with Stream Processors,” T. Heyn, A. Tasora, M. Anitescu, H. Mazhar, D. Negrut, ASME IDETC Conference, San Diego, CA, 2009.

“On the Construction and Use of Surrogate Models for the Dynamic Analysis of Multibody Systems,” H. Ansari Ardeh, M. Tupy, D. Negrut, ASME International Mechanical Engineering Congress & Exposition, Orlando, FL, 2009.

“On the Use of Meshless Methods in Acoustic Simulations,” P. Hahn, D. Negrut, ASME International Mechanical Engineering Congress & Exposition IMECE2009, Orlando, FL, 2009.

“A Framework For Quantifying Uncertainty In Nonlinear Multibody Dynamics,” M. Datar, D. Gorsich, D. Lamb, D. Negrut, 7th International Conference on Multibody Systems, Nonlinear Dynamics, and Control (MSNDC), San Diego, CA, 2009.

“A Parallel Algorithm for Solving Complex Multibody Problems with Stream Processors,” T. Heyn, H. Mazhar, A. Tasora, M. Anitescu, D. Negrut, in ECCOMAS Multibody Dynamics Conference, J. Frączek, Editor, Warsaw, Poland, 2009.

“Reduction of Electronic Structure Problems of Density Functional Theory,” J. Murray, D. Negrut, M. Anitescu, A. El-Azab, 10th US National Congress on Computational Mechanics, Columbus, OH, 2009.

“GPU-Based Parallel Collision Detection for Granular Flow Dynamics,” H. Mazhar, T. Heyn, A. Tasora, D. Negrut, in ECCOMAS Multibody Dynamics Conference, J. Frączek, Editor, Warsaw, Poland, 2009.

“A Stochastic Approach to Integrated Vehicle Reliability Prediction,” J. Madsen, D. Ghiocel, D. Gorsich, D. Lamb, D. Negrut, ASME IDETC Conference, San Diego, CA, 2009.

“A Framework For Quantifying Uncertainty In Nonlinear Multibody Dynamics,” D. Negrut, D. Gorsich, D. Lamb, M. Datar, Army Science Conference, Orlando, FL, 2008.

“A Gaussian Process Based Approach for Handling Uncertainty in Vehicle Dynamics Simulations – IMECE2008-66664,” K. Schmitt, J. Madsen, M. Anitescu, D. Negrut, ASME International Mechanical Engineering Congress & Exposition, Boston, MA, 2008.

“A GPU-Based Implementation of a Cone Convex Complementarity Approach for Simulating Rigid Body Dynamics with Frictional Contact IMECE2008-66766,” A. Tasora, D. Negrut, M. Anitescu, Proceedings of IMECE2008 ASME International Mechanical Engineering Congress and Exposition, Boston, MA, 2008.

“Building Gaussian Process Based Metamodels Using Variable-fidelity Experiments for Dynamic Analysis of Mechanical Systems,” D. Negrut, Z. G. Qian, N. Khude, ASME International Mechanical Engineering Congress and Exposition, Seattle, WA, 2007.

“Co-simulation Environment for Vehicle-Powertrain-Tire On/Off Road Analysis,” I. Stanciulescu, M. Datar, D. Negrut, ISTVS Conference and Annual Meeting of Japanese Society for Terramechanics, Fairbanks, Alaska, 2007.

“A Comparison of Low Order Numerical Integration Formulas for Time Domain Analysis of Mechanical Systems,” D. Negrut, L. O. Jay, N. Khude, T. Heyn, ECCOMAS Conference, Milan, Italy, 2007.

“A Co-simulation Environment for Virtual Prototyping of Ground Vehicles,” A. Dyer, S. Pagerit, M. Datar, D. Mehr, D. Negrut, SAE Commercial Vehicle Engineering Congress & Exhibition, Rosemont, IL, 2007.

“An Investigation on New Numerical Methods for Molecular Dynamics Simulation,” N. Schafer, R. Serban, D. Negrut, ASME International Design Engineering Technical Conferences, Las Vegas, NV, 2007.

“On the Dimensional Reduction of the Structure Problem of Nanoscale Materials,” D. Negrut, S. Rokkam, M. Anitescu, P. Zapol, A. El-Azab, Materials Research Society Fall Meeting, Boston, MA, 2006.

“Accurate Input/Output Equations of Linearized Multibody Systems,” J. Ortiz, D. Negrut, 3rd Asian Conference on Multibody Dynamics, Tokyo, Japan, 2006.

“A Real-Space Parallel Optimization Model Reduction Approach for Electronic Structure Computation in Large Nanostructures Using Orbital-Free Density Functional Theory,” D. Negrut, M. Anitescu, A. El-Azab, S. Benson, P. Zapol, ASME International Mechanical Engineering Congress and Exposition (IMECE 2006), Chicago, IL, 2006.

“Improved Simulation of Models with Complex User-subroutines in MSC.ADAMS,” D. Negrut, G. Ottarsson, M. Belczynski, C. Corcoran, SAE Technical Paper 2006-01-0158, SAE International Congress & Exposition, Detroit, MI, 2006.

“Exact Linearization of Multibody Systems using User-defined Coordinates,” J. Ortiz, D. Negrut, SAE Technical Paper 2006-01-0587, SAE International Congress & Exposition, Detroit, MI, 2006.

“Simulating Nanoscale Processes in Solids Using DFT and the Quasicontinuum Method,” D. Negrut, M. Anitescu, T. Munson, P. Zapol, ASME International Mechanical Engineering Congress and Exposition, Orlando, FL, 2005.

“The Newmark Integration Method for Simulation of Multibody Systems: Analytical Considerations,” B. Gavrea, D. Negrut, F. Potra, ASME International Mechanical Engineering Congress and Exposition, Orlando, FL, 2005.

“On an Approach for the Linearization of the Differential Algebraic Equations of Multibody Dynamics,” D. Negrut, J. Ortiz, ASME International Design Engineering Technical Conferences, Long Beach, CA, 2005.

“On the Use of the HHT Method in the Context of Index 3 Differential Algebraic Equations of Multibody Dynamics,” D. Negrut, R. Rampalli, G. Ottarsson, A. Sajdak, ASME International Design Engineering Technical Conferences, Long Beach, CA, 2005.

“On the Issue of Iterative Linear Algorithms for the Multi-Threaded Simulation of Mechanical Systems Represented in Cartesian Coordinates,” D. Negrut, Virtual Nonlinear Multibody Systems, NATO Advanced Study Institute, Prague, Czech Republic, 2002.

“State Space Methods for Implicit Integration of Equations of Multibody Dynamics,” D. Negrut, E. Haug, Advances in Design Automation-Proceedings of the ASME Design Automation Conference, Las Vegas, NV, 1999.

“Variable Step Implicit Integration of Stiff Multibody Systems,” D. Negrut, E. Haug, M. Iancu, Computational Methods in Mechanisms, J. Angeles and E. Zakhariev Eds., NATO ASI Conference, Varna, Bulgaria, 1997.

“Parameter Identification for Multibody Dynamic Systems,” R. Serban, J.S. Freeman, D. Negrut, Proceedings of the ASME Design Automation Conference, Sacramento, CA, 1997.

“Implicit Integration of the Equations of Multibody Dynamics in Descriptor Form,” E. Haug, M. Iancu, D. Negrut, Advances in Design Automation-Proceedings of the ASME Design Automation Conference, Sacramento, CA, 1997.

“Implicit Integration of the Equations of Multibody Dynamics,” E. Haug, D. Negrut, M. Iancu, Computational Methods in Mechanical Systems, J. Angeles and E. Zakhariev Eds., NATO ASI Conference, Varna, Bulgaria, 1997.

“Implicit Integration of the Equations of Multibody Dynamics: Descriptor Form,” M. Iancu, E. Haug, D. Negrut, Computational Methods in Mechanisms, J. Angeles and E. Zakhariev Eds., NATO ASI Conference, Varna, Bulgaria, 1997.

“Dynamic Tire Modeling for Application with Vehicle Simulations Incorporating Terrain,” D. Negrut, J. Freeman, SAE Technical Paper Series 940223, SAE International Congress & Exposition, Detroit, MI, 1994.

Invited Talks, Seminars

### Conferences, Workshops & Symposia

“High Performance Computational Dynamics in a Heterogeneous Hardware Ecosystem,” National Defense Industrial Association, Denver, CO, November 2011

“HCT: A Heterogeneous Computing Template for dynamical system simulation in Engineering,” workshop Integration of Mathematical and Biological Sciences – MathBio3: Modeling, University of Wisconsin-Madison, September 30 2011

“Large Scale Frictional Contact Dynamics on the GPU,” Institute for Mathematics and Its Applications, Workshop on “High Performance Computing and Emerging Architectures,” Minneapolis, January 2011

“A Heterogeneous Computing Template for Distributed Parallel Computing,” FunctionBay User Conference, Seoul, S. Korea, October 2010

“Getting Started with CUDA,” tutorial at the Politecnico di Milano, Italy, November 2009

“Toward Million Body Granular Flow Dynamics on the GPU,” OptimA 2009 Workshop, University of Illinois at Urbana Champaign, IL, March 2009

“An Investigation on GPU Collision Detection Using Spatial Subdivision,” joint work presented by lab undergraduate student Hammad Mazhar at the 11th Annual Undergraduate Symposium, April 15th, Madison, WI, April 2009

“Implicit Numerical Integration for Molecular Dynamics Simulation,” joint work presented by lab undergraduate student Nicholas Schafer at the 10th Annual Undergraduate Symposium, April 16th, Madison, WI, April 2008

“Reconstruction Approach for Electronic Structure Computation,” at Simulation and Modeling for Advanced Nuclear Energy Systems Workshop organized by Department of Energy, Washington D.C., February 2006

“On Using Cartesian Coordinates for Molecular Dynamics Simulations,” BIRS Workshop on Mathematical Issues in Molecular Dynamics Simulation, Banff, Canada, July 2005

### Academia

“From the Dynamics of Sand to the Dynamics of Robots: Using Advanced Computing in Virtual Prototyping for Better Engineering Designs,” Department of Mechanical Engineering, University of Michigan, April 16, 2013

“Using Advanced Computing in Applied Dynamics: From the Dynamics of Granular Material to the Motion of the Mars Rover,” Department of Mathematics Colloquium, University of Wisconsin-Madison, March 8, 2013

“Using Advanced Computing in Applied Dynamics: From the Dynamics of Granular Material to the Motion of the Mars Rover,” Department of Mathematics Colloquium, University of Wisconsin-Madison, February 28, 2013

“From the Dynamics of Sand to the Dynamics of Robots: Using Advanced Computing in Virtual Prototyping for Better Engineering Designs,” Biomedical Engineering Seminar Series, University of Wisconsin-Madison, January 28, 2013

“From the Dynamics of Sand to the Dynamics of Tanks: Using High Performance Computing to Advance the Pace of Innovation and Improve Designs in Mechanical Engineering,” Mechanical Engineering and Applied Mechanics Seminar Series Fall 2012, University of Pennsylvania, Philadelphia, October 16, 2012

“Using Parallel Computing in Multibody Dynamics Simulation,” Department of Aeronautics, Politecnico di Milano, Italy, May 28, 2012

From the Dynamics of Sand to the Dynamics of Tanks: Using High Performance Computing to Advance the Pace of Innovation and Improve Designs in Mechanical Engineering,” Texas Tech University, April 2, 2012

“From the Dynamics of Sand to the Dynamics of Tanks: Using High Performance Computing to Advance the Pace of Innovation and Improve Designs in Mechanical Engineering,” Lindbergh Series Seminar, University of Wisconsin-Madison, March 29, 2012

“From the Dynamics of Sand to the Dynamics of Tanks: Using High Performance Computing to Advance the Pace of Innovation and Improve Designs in Mechanical Engineering,” Jiao Tong University, Shanghai, China, December 9, 2011

“High Performance Computational Dynamics at UW-Madison,” talk in the Wisconsin Institute for Discovery - Doing Optimization at Wisconsin (WID-DOW) seminar series, University of Wisconsin-Madison, WI, October 2011

“Enabling High Performance Computational Dynamics in a Heterogeneous Hardware Ecosystem,” talk in at the Polytechnic University of Bucharest and University of Petrosani, Romania, June 2011

“Parallel Computational Multibody Dynamics,” talk in the Department of Chemical and Biological Engineering, University of Wisconsin-Madison, December 2010

“On an Approach for the Parallel Solution of Large Frictional Contact Problems,” talk in the Department of Electrical Engineering, Babes-Bolyai University, Cluj, Romania, July, 2010

“On an Approach for the Parallel Solution of Large Frictional Contact Problems,” talk at the NIH Center of Biomedical Computation, Stanford University, May 2010

“Multibody Dynamics on the GPU,” talk in the Department of Medical Physics, University of Wisconsin – Madison, February 2010

“Multibody Dynamics on the GPU,” talk in the BME Department, University of Wisconsin – Madison, March 2010

“Large Scale Granular Dynamics Simulation with Applications in Ground Vehicle Mobility,” talk in the Department of Civil and Environmental Engineering, Rice University, Houston, TX, November 2009

“Large Scale Granular Dynamics Simulation with Applications in Ground Vehicle Mobility,” talk in the Department of Aeronautics, Politecnico di Milano, Italy, November 2009

“An Overview of Research Projects in the Simulation-Based Engineering Lab at the University of Wisconsin-Madison,” talk in the Department of Aeronautics, Politecnico di Milano, Italy, November 2009

“Large Scale Granular Dynamics Simulation with Applications in Ground Vehicle Mobility,” talk in the Department of Industrial Engineering, University of Parma, Italy, November 2009

“GPU Computing in Multibody Dynamics Simulation,” talk in the Dynamics Simulation Laboratory at the University of Illinois at Chicago, October 2009

“GPU Computing in Multibody Dynamics Simulation,” seminar for UW-Madison Tau Sigma Pi Student Organization, April 2009

“Democratization of HPC: An Overview of GPU Computing,” seminar hosted by “Hacker Within,” a group of computer enthusiasts from the College of Engineering at University of Wisconsin-Madison, September 2009

“An Overview of the Research in the Simulation-Based Engineering Lab,” talk in the Department of Electrical Engineering, Babes-Bolyai Technical University, Cluj, Romania, July 2008

“Multibody Dynamics Analysis for Improved Engineering Design through Virtual Prototyping,” Graduate Student seminar, Dept. of Mechanical Engineering, University of Iowa, November 2007

“A Reconstruction Approach to Electronic Structure Computation,” Department of Mechanical, Aerospace & Nuclear Engineering at the Rensselaer Polytechnic Institute, November 2006

“Computational Science in Engineering,” seminar for University of Wisconsin-Madison Pi Tau Sigma Student Organization, April 2006

“A Reconstruction Approach to Electronic Structure Computation,” City University of New York, November 2006

“Extensions of the HHT-Method to Differential-Algebraic Equations in Mechanics,” University of Illinois at Chicago, August 2006

“A Reconstruction Approach to Electronic Structure Computation,” Materials Science Program Lecture Series, University of Wisconsin-Madison, October 2006

“On the Use of Newmark Methods for Simulation of Mechanical Systems,” Applied Mathematics Seminar, Department of Mathematics, University of Michigan, Ann Arbor, MI, April 2003

“On the Use of Newmark Methods for Simulation of Mechanical Systems,” Applied Mathematics Seminar, Department of Mathematics, Oakland University, Oakland, MI, April 2003

### National Laboratories and Army

“Using Advanced Computing in Multibody Dynamics,” U. S. Army Tank Automotive Research, Development, and Engineering Center, Warren, MI, April, 2013

“Chrono: a Modeling, Simulation, and Visualization Environment for Applications in Mechanical Engineering,” U. S. Army Tank Automotive Research, Development, and Engineering Center, Warren, MI, November 2012

“Using High Performance Computing in Computational Dynamics,” U. S. Army Tank Automotive Research, Development, and Engineering Center, Warren, MI, January 2012

“A Heterogeneous Computing Template for Distributed Parallel Computing,” Chinese Academy of Science, Beijing, December 13, 2011

“Using HPC for Granular Dynamics Simulation,” Jet Propulsion Laboratory, Pasadena, CA, November 15, 2011

“A Heterogeneous Computing Template for Distributed Parallel Computing,” Mathematics and Computer Science Division, Argonne National Laboratory, Argonne, IL, September 2010

“A Heterogeneous Computing Template for Distributed Parallel Computing,” Jet Propulsion Laboratory, Pasadena, CA, September 2010

“Scalable Parallel Simulation of Granular Dynamics on the GPU,” NASA-Glenn Research Center, Cleveland, OH, January 2010

“Scalable Parallel Simulation of Granular Dynamics on the GPU,” Jet Propulsion Laboratory, Pasadena, CA, September 2009

“Tracked Vehicle Simulation on Deformable Terrain,” U. S. Army Tank Automotive Research, Development, and Engineering Center, Warren, MI, December 2009

“Solving Large Scale Cone Complementarity Problems on the GPU,” Mathematics and Computer Science Division, Argonne National Laboratory, Argonne, IL, August 2009

“An Overview of Several Computational Multi-Body Dynamics Related Projects at the Simulation-Based Engineering Lab,” U. S. Army Material Systems Analysis Activity, Aberdeen, MD, March 2009

“An Overview of Computational Science Projects at the Simulation-Based Engineering Lab,” U. S. Army Tank Automotive Research, Development, and Engineering Center (TARDEC), Warren, MI, July 2008

“Computational Dynamics for Virtual Prototyping: Using Computers to Understand the Dynamics of Complex Systems,” Army Research Laboratory, Aberdeen, MD, April 2008

“Fast Frictional Contact Dynamics Analysis on the GPU,” Jet Propulsion Laboratory (JPL), Pasadena, CA, April 2008

“Computational Dynamics for Virtual Prototyping: Using Computers to Understand the Dynamics of Complex Systems,” Tank Automotive Research and Development Engineering Center (TARDEC), Warren, MI, April 2008

“A Class of Numerical Integrators for the Time-Domain Analysis of Mechanical Systems,” Mathematics and Computer Science Division, Argonne National Laboratory, Argonne, IL, February 2007

“On the Use of the Parallel Optimization Solver TAO in Electronic Structure Computation,” Mathematics and Computer Science Division, Argonne National Laboratory, Argonne, IL, August 2006

“A Reconstruction Approach to Electronic Structure Computation,” Mathematics and Computer Science Division, Argonne National Laboratory, Argonne, IL, November 2005

“Numerical Methods for Time Domain Analysis of Mechanical Systems,” Mathematics and Computer Science Division, Argonne National Laboratory, Argonne, IL, 2004

### Industry

“An Overview of Research Projects in the Simulation-Based Engineering Lab,” MSC.Software, Ann Arbor, MI, June 5, 2013

“An Overview of Research Projects in the Simulation-Based Engineering Lab,” FunctionBay, Soul, S. Korea, January 14, 2013

“Chrono: An Advanced Computing Framework for Multi-Physics Modeling, Simulation, and Visualization,” ThyssenKrupp Fördertechnik, Essen, Germany, December 6, 2012

“Chrono: An Advanced Computing Framework for Multi-Physics Modeling, Simulation, and Visualization,” Rheinisch-Westfälisches Elektrizitätswerk AG (RWE), Dortmund, Germany, December 5, 2012

“Chrono: An Advanced Computing Framework for Multi-Physics Modeling, Simulation, and Visualization,” Caterpillar, Dusseldorf, Germany, December 4, 2012

“Chrono: An Advanced Computing Framework for Multi-Physics Modeling, Simulation, and Visualization,” Liebherr, Colmar, France, December 3, 2012

“Chrono: An Advanced Computing Framework for Multi-Physics Modeling, Simulation, and Visualization,” MSC.Software, Ann Arbor, MI, November 13, 2012

“High Performance Computing in Many-Body Dynamics Simulation,” GlaxoSmithKline, Philadelphia, Pa, October 15, 2012

“High Performance Computing for Virtual Prototyping” Caterpillar, Peoria, Il, April 27, 2012

“High Performance Computing for Virtual Prototyping” DreamWorks, Glendale, Ca, April 6, 2012

“From the Dynamics of Sand to the Dynamics of Tanks: Using Advanced Computing to Advance the Pace of Innovation and Improve Designs in Mechanical Engineering” Advance Micro Devices (AMD), Austin, TX, February 6, 2012

“From the Dynamics of Sand to the Dynamics of Tanks: Using Advanced Computing to Advance the Pace of Innovation and Improve Designs in Mechanical Engineering,” NVIDA Asia GPU Technical Conference, December 15, 2011

“A Heterogeneous Computing Template for Many-body Dynamics Simulation,” John Deere, Moline, IL, November 30, 2011

“Using HPC for Granular Dynamics Simulation,” MSC.Software, Santa Ana, CA, November 14, 2011

“High Performance Computational Dynamics at the University of Wisconsin-Madison,” Caterpillar, Peoria, IL, October 14, 2011

“High Performance Computational Dynamics at the University of Wisconsin-Madison,” Goodyear, Akron, OH, August 2011

“High Performance Computational Dynamics at the University of Wisconsin-Madison,” Lexmark, Lexington, KY, August 2011

“High Performance Computational Dynamics at the University of Wisconsin-Madison,” Procter&Gamble Corporation, Cincinnati, OH, August 2011

“From Multi-Body Dynamics to Many-Body Dynamics: Taking the Leap,” The Congress on the Future of Engineering Software (COFES-2011), Scottsdale, AZ, April 2011

“Frictional Contact Dynamics of Large Multi-Body Systems,” John Deere Corporation, Dubuque, IA, March 2011

“Frictional Contact Dynamics of Large Multi-Body Systems,” United Technology Research Center, Hartford, CT, February 2011

“An Overview of Research Projects in the Simulation-Based Engineering Lab at the University of Wisconsin-Madison,” FunctionBay Incorporated, Seoul, S. Korea, October 2010

“A Heterogeneous Computing Template for Distributed Parallel Computing,” Caterpillar, Moline, IL, September 2010

“A Heterogeneous Computing Template for Distributed Parallel Computing,” British Aerospace Engineering (BAE) – Land Division, Santa Clara, CA, September 2010

“Solving Large Scale Cone Complementarity Problems on NVIDIA’s GPU,” NVIDIA Corporation, Santa Clara, CA, September 2009

“Using Multibody Dynamics Simulation for Virtual Prototyping in Engineering Design,” P&H Mining, Milwaukee, WI, April 2009

“Computational Dynamics for Virtual Prototyping: Using Computers to Understand the Dynamics of Complex Systems,” General Motors, Warren, MI, April 2008

“Simulation-Based Engineering and its Impact on Virtual Prototyping,” British Aerospace Engineering – Land Division, Santa Clara, CA, April 2008

“Multibody Dynamics on Commodity High Performance Computing: A Look Ahead,” MSC.Software Vehicle Dynamics Symposium, Detroit, MI, April 2008

“Co-simulation Environment for Vehicle-Powertrain-Tire on/off-road Analysis,” MSC.Software North America User Conference, Detroit, MI, October 2007

“Virtual Prototyping in the Simulation-Based Engineering Laboratory at University of Wisconsin,” British Aerospace Systems – Land Division, Santa Clara, CA, January 2007

“Advanced Computational Dynamics using ADAMS/Solver,” two day industry seminar, Beijing, China, September 2004

“Advanced Computational Dynamics using ADAMS/Solver,” two day industry seminar, Tokyo, Japan, September 2004

“Advanced Computational Dynamics using ADAMS/Solver,” two day industry seminar, Munich, Germany, November 2004