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Mark William Schraad

Mark Schraad

Expertise

Scale-dependent behavior, instabilities, and localization phenomena in structured materials

Micro-mechanics, homogenization techniques, and non-local continuum theories

Multi-scale constitutive modeling of structured materials

Stochastic modeling techniques for materials with disordered structure

Multi-phase modeling of coupled fluid-solid systems

Education

B.S., Magna Cum Laude, Aerospace Engineering and Mechanics, The University of Minnesota, Minneapolis, Minnesota, 1990

M.S., Aerospace Engineering, The University of Michigan, Ann Arbor, Michigan, 1991

M.S., Mathematics, The University of Michigan, Ann Arbor, Michigan, 1995

Ph.D., Aerospace Engineering, The University of Michigan, Ann Arbor, Michigan, 1996

 

LANL Positions

Group Leader, Fluid Dynamics and Solid Mechanics Group (T-3), 2005-present

Project Leader, ASC Physics and Engineering Models Program, Materials Project, 2010-present

Program Manager (Acting), ASC Physics and Engineering Models Program, 2013-2014

Deputy Division Leader (Acting), Theoretical Division, 2010

Deputy Group Leader, Fluid Dynamics Group (T-3), 2002-2005

Technical Staff Member, Fluid Dynamics Group (T-3), 1998-2002

Post-Doctoral Research Associate, Fluid Dynamics Group (T-3), 1996-1998

 

 

Publications

Schraad, M. W., 2013. A theoretical approach to the coupled fluid-solid physical response of porous and cellular materials. To appear in Hysteresis and the Quasi-Static Response of Strongly Coupled Elastic-Fluid Systems. A. H. Kim, R. A. Guyer, eds., Wiley, Weinheim, Germany.

Schraad, M.W., and Harlow, F. H., in preparation. Wave propagation in cellular material systems and the role of the permeating fluid. International Journal of Mechanical Sciences, to be submitted.

Schraad, M. W., in preparation. The disparate roles of parent solid visco-elasticity and permeating fluid viscosity in the rate-dependent response of cellular materials systems. International Journal of Mechanical Sciences, to be submitted.

Schraad, M. W., in preparation. A stochastic constitutive model for disordered cellular materials: rate dependence of the parent solid. Journal of the Mechanics and Physics of Solids, to be submitted.

Schraad, M. W., in preparation. On the macroscopic properties of continuous media with nearly periodic microstructures. International Journal of Solids and Structures, to be submitted.

Schraad, M. W., 2013. A multi-field approach to biomechanics. Journal of Biomechanics, submitted.

Schraad, M. W., 2013. A stochastic constitutive model for disordered cellular materials: finite strain in three dimensions. International Journal of Solids and Structures, submitted.

Schraad, M. W., et al., 2013. Advanced Simulation and Computing Program 2013 Level 2 Milestone Report on Multi-Phase Strength Modeling. Advanced Simulation and Computing, Physics and Engineering Models, Material Project Level 2 Milestone Report. Los Alamos National Laboratory Report, in preparation.

Schraad, M. W., Bronkhorst, C. A., Preston, D. L., and Chen, S.-R., 2012. 2012 Level 1 Milestone Report for Strength and Damage (U). Nuclear Weapons Program Level 1 Milestone Report. Los Alamos National Laboratory Report, LA-CP-12-01051.

Gray, G. T. III, et al., 2012. Characterization of depleted uranium strength and damage behavior. Campaign 2 Level 2 Milestone Report. Los Alamos National Laboratory Report, LA-UR-12-26963.

Bronkhorst, C.A., et al., 2012. Modeling of damage and failure in depleted uranium. Los Alamos National Laboratory Report, Summary Joint Munitions Program Report. LA-UR-12-25221.

Bronkhorst, C. A., et al., 2010. Microstructure based heterogeneity evolution leading to material phase transformation and damage/failure events. MaRIE External Advisory Committee Report. Los Alamos National Laboratory Report, LA-UR-10-00059.

Kashiwa, B. A., Schraad, M. W., and Hull, L. M., 2009. Multifield fragmentation. Theory, Simulation, and Computation Directorate 2009 Science Highlights. Los Alamos National Laboratory Report, LA-UR-09-01756.

Schraad, M. W., 2007. The influence of dispersity in geometric structure on the stability of cellular solids. Mechanics of Materials 39, 183–198.

Triantafyllidis, N., Nestorovic, M. D., and Schraad, M. W., 2006. Failure surfaces for finitely strained two-phase periodic solids under general in-plane loading. Journal of Applied Mechanics 73, 505–515.

Schraad, M. W., and Harlow, F. H., 2006. A multi-field approach to modeling the dynamic response of cellular materials. International Journal of Mechanical Sciences 48, 85–106.

Schraad, M. W., and Harlow, F. H., 2006. A stochastic constitutive model for disordered cellular materials: finite-strain uni-axial compression. International Journal of Solids and Structure 43, 3542–3568.

Schraad, M. W., and Harlow, F. H., 2006. Permeating fluid effects in cellular materials systems under dynamic loading. Theoretical Division Nuclear Weapons Program Highlights 2005–2006. Los Alamos National Laboratory Report, LA-UR-06-3716.

Schraad, M. W., 2006. Instabilities in cellular solids and the role of dispersity in geometric structure. Theoretical Division Nuclear Weapons Program Highlights 2005–2006. Los Alamos National Laboratory Report, LA-UR-06-3716.

Schraad, M. W., 2006. Instabilities in cellular solids and the role of dispersity in geometric structure. Theoretical Division Research Highlights 2006. Los Alamos National Laboratory Report, LA-LP-06-100.

Schraad, M. W., and Harlow, F. H., 2006. Permeating fluid effects in cellular materials systems under dynamic loading. Theoretical Division Research Highlights 2006. Los Alamos National Laboratory Report, LA-LP-06-100.

Schraad, M. W., 2005. Modeling coupled fluid-solid response in low-density cellular material systems. Nuclear Weapons Journal 2005, Issue 2, 22–24.

Schraad, M. W., 2005. A stochastic constitutive model and multi-field approach for modeling the dynamic response of cellular materials. Proceedings of the 2005 ASME International Engineering Congress & Exposition IMECE2005-79721.

Schraad, M. W., Harlow, F. H., Liu, C., 2003. The mechanical response of cellular materials. Theory in Action. Highlights in the Theoretical Division at Los Alamos 1943–2003. Los Alamos National Laboratory History Report, LA 14000-H

Schraad, M. W., 2001. On the macroscopic properties of discrete media with nearly periodic microstructures. International Journal of Solids and Structures 38, 7381–7407.

Schraad, M. W., Kashiwa, B. A., Rauenzahn, R. M., and Addessio, F. L., 1999. A computational technique for modeling large deformations, damage, and free-surface creation in solid materials. Proceedings of the 15th U.S. Army Symposium on Solid Mechanics. Los Alamos National Laboratory Report, LA-UR-99-1496.

Addessio, F. L., Schraad, M. W., and Lewis, M. W., 1999. Physics-based damage predictions for simulation testing and evaluation (T&E) experiments. LDRD Final Report. Los Alamos National Laboratory Report, LA-UR-99-0484.

Schraad, M. W., Kashiwa, B. A., Rauenzahn, R. M., and Addessio, F. L., 1998. Computational technique for modeling large deformations, damage, and free-surface creation in solid materials. LDRD Progress Report. Los Alamos National Laboratory Report, LA-UR-98-4433.

Schraad, M. W., 1998. Physics-based modeling of hydrodynamic ram phenomena. Report to U.S. Air Force Major General Cliver. Los Alamos National Laboratory Report, LA-UR-98-3041

Schraad, M. W., 1998. Polymeric foam modeling: bridging the cellular and structural length scales. Report to Dow Chemical, Inc. Los Alamos National Laboratory Report, LA-UR-98-3040.

Schraad, M. W., 1998. Hydrodynamic ram modeling and simulation: a progress report. Report to the Air Force Research Laboratories, Wrigth-Patterson Air Force Base. Los Alamos National Laboratory Report, LA-UR-98-1389.

Zuo, Q. H., Addessio, F. L., Maudlin, P. J., and Schraad, M. W., 1997. Implicit integration algorithms for rate-independent ductile failure models. Proceedings of the 1998 International Computational Engineering Science Conference, Constitutive Modeling of High-Strain-Rate Behaviors of Materials. Los Alamos National Laboratory Report, LA-UR-97-5172.

Triantafyllidis, N., and Schraad, M. W., 1998. Onset of failure in aluminum honeycombs under general in-plane loading. Journal of the Mechanics and Physics of Solids 46, 1089–1124.

Addessio, F. L., et al., 1997. Physics-based damage predictions for simulation testing and evaluation (T&E) experiments. LDRD Progress Report. Los Alamos National Laboratory Report, LA-UR-97-4877.

Schraad, M. W., and Addessio, F. L., 1997. CFDLib: A library of continuum mechanics codes for fully coupled, fluid-solid interaction modeling. Department of Defense Report. Los Alamos National Laboratory Report, LA-UR-97-3866.

Schraad, M. W., and Triantafyllidis, N., 1997. Scale effects in media with periodic and nearly periodic microstructure, Part I: failure mechanisms. Journal of Applied Mechanics 64, 763–771.

Schraad, M. W., and Triantafyllidis, N., 1997. Scale effects in media with periodic and nearly periodic microstructure, Part I: macroscopic properties. Journal of Applied Mechanics 64, 751–762.