1 CURRICULUM VITAE Amit Acharya 101 Porter Hall Carnegie Mellon University Pittsburgh, PA ...

14 Pages·2017·0.18 MB·English

CURRICULUM VITAE

Amit Acharya
101 Porter Hall
Carnegie Mellon University
Pittsburgh, PA 15213-3890
Tel. [phone]
Fax. [phone]
Email – [email protected]
Education
Ph. D., Theoretical and Applied Mechanics, University of Illinois, Urbana-Champaign, 1994
M.S., Mining Engineering (Rock Mechanics), University of Utah, 1991
B. Tech., Mining Engineering, Indian School of Mines, India, 1988
Appointments
Professor, Civil and Environmental Engineering, Carnegie Mellon University, July 2007,
Materials Science and Engineering (by courtesy), Carnegie Mellon University
Permanent Member, Center for Nonlinear Analysis, Mathematical Sciences, Carnegie Mellon University
Visiting Professor, Mathematical Sciences, University of Bath, 2015-18
Associate Professor, Civil & Environmental Engineering, Carnegie Mellon University, Jul. 2003
Assistant Professor, Civil & Environmental Engineering, Carnegie Mellon University, Aug. 2000-2003
Research Scientist, Center for Simulation of Advanced Rockets, University of Illinois at Urbana-
Champaign, 1998-2000
Senior Research Engineer, ABAQUS, Inc., Rhode Island, 1995-1998
Post-Doctoral Research Fellow, MEAM, University of Pennsylvania, 1994-1995
Research and Teaching Assistant, Theoretical and Applied Mechanics, University of Illinois at Urbana-
Champaign, 1990-1994
Research and Teaching Assistant, Mining Engineering, University of Utah, 1988-1990

Honors and Awards
• INdAM (Istituto Nazionale di Alta Matematica Francesco Severi) Visiting Professor, University of
Pavia, Italy, 2016
• Rosi and Max Varon Visiting Professorship, Weizmann Institute of Science, Israel, 2015
• Visiting Professorship of the Leverhulme Trust to the University of Bath, U.K., 2015
• Invited Mini-course lecturer at Scuola Internazionale Superiore di Studi Avanzati (SISSA), Trieste,
Italy, 2015

Visiting Positions
• Mathematical Institute, Oxford University, UK, 2008
• Laboratoire de Mecanique et d’Acoustique, CNRS, Marseille, France, 2008-2009
• Dept. of Applied Mathematics and Theoretical Physics, Cambridge University, UK, 2009
• Laboratoire d’Etude des Microstructures et de Mecanique des Materiaux, Universite de Lorraine,
Metz, France, 2010/2011
• International Centre for Mathematical Sciences, Edinburgh, Scotland, 2012
• Mathematical Sciences, University of Bath, UK, 2015
• Weizmann Institute of Science, Israel, 2015-16.
Research Activities and Interests
Continuum Mechanics, Mathematical Materials Science, Applied Mathematics: interests include continuum
dislocation mechanics and plasticity, liquid crystal mechanics, solid-solid phase transformations, damage,
coarse-graining of nonlinear time-dependent systems, computational modeling of elastic and inelastic
behavior of solids, nonlinear shell theory and fluid-structure interaction including mass transfer.

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(selected) Industrial and Government Sponsored Research Experience

1995-1998

Senior Research Engineer, ABAQUS/Standard Development Group, Hibbitt, Karlsson &
Sorensen, Inc., 1080 Main Street, Pawtucket, Rhode Island, RI 02860-4847

Technical support and Development of nonlinear finite element software related to solid
mechanics and heat transfer applications. Lead developer of ABAQUS/Standard
products: (only) fully-integrated, finite strain shell element, S4; nonlinear viscoelastic
material model (Bergström-Boyce), *Hysteresis; triangular heat transfer elements DS3
and DS6; and closed-end loading conditions and pressure load stiffness for ELBOW31
and ELBOW32 structural elements.

1998-2000

Research Scientist, Center for Simulation of Advanced Rockets, University of Illinois at
Urbana-Champaign, 1304 W. Springfield Avenue, IL 61801
Member of the System Integration Team and Engineering Code Development Team.
Worked on numerical modeling of ‘non-material’ solid-gas interface and solid region,
using an ALE technique, in solid rocket booster motors; formulation of a space-time
finite-element method for the mechanics of solid rocket booster motors; formulation of
high-performance finite elements for structural analysis (rocket casing); formulation of
gradient single crystal and polycrystal plasticity models (rocket casing).

Membership in Professional Organizations

Materials Research Society
Society of Industrial and Applied Mathematics
Society of Rheology
Society for Natural Philosophy

Research Funding

National Science Foundation, Office of Naval Research, Army Research Office, Air Force Office of
Scientific Research, Department of Energy NNSA/NETL, Pennsylvania Infrastructure and Technology
Alliance.

Consulting
1. Hibbitt, Karlsson, and Sorensen, Inc., Providence, Rhode Island (ABAQUS)
2. Air Force Research Laboratory, Wright Patterson Air Force Base, Dayton, Ohio
3. ExxonMobil Upstream Research Company, Houston, Texas
4. Applied Science Consultants, Pittsburgh, Pennsylvania
5. ANSYS, Inc. Canonsburg, Pennsylvania
6. Los Alamos National Laboratory, Los Alamos, New Mexico

Publications
(for recent submitted work, see http://faculty.ce.cmu.edu/acharya/publications/ )

Archival Journals

1. Chiqun Zhang, Xiaohan Zhang, Amit Acharya, Dmitry Golovaty, and Noel Walkington. (2017) A non-
traditional view on the modeling of nematic disclination dynamics. Quarterly of Applied Mathematics,
LXXV, 309-357. (electronically published on August 18, 2016).
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2. Amit Acharya, Marta Lewicka, and Mohammad Reza Pakzad (2016) The metric-restricted inverse
design problem, Nonlinearity, 29, 1769-1797.

3. Amit Das, Amit Acharya, Pierre Suquet (2016) Microstructure in plasticity without nonconvexity,
Computational Mechanics, 57, 387-403.

4. Xiaohan Zhang, Amit Acharya, Noel J. Walkington, Jacobo Bielak, (2015) A single theory for some
quasi-static, supersonic, atomic, and tectonic scale applications of dislocations, Journal of the
Mechanics and Physics of Solids, 84, 145-195.

5. Pourmatin, H., Acharya, A., Dayal, K, (2015) A fundamental Improvement to Ericksen-Leslie
kinematics, Quarterly of Applied Mathematics, LXXXIII, 3, 435-466.

6. Garg, A., Acharya, A., Maloney, C. E. (2014) A study of conditions for dislocation nucleation in
coarser-than-atomistic scale models, Journal of the Mechanics and Physics of Solids, 75, 76-92.

7. Brenner, R., Beaudoin, A. J., Suquet, P., Acharya, A. (2014) Numerical implementation of static Field
Dislocation Mechanics theory for periodic media, Philosophical Magazine, A., 94, 1764-1787,
(Electronically published 2013).

8. Tan, L., Acharya, A., Dayal, K. (2014) Modeling of slow time-scale behavior of fast molecular
dynamic systems, Journal of the Mechanics and Physics of Solids, 64, 24-43.

9. Zhu, Y., Chapman, S. J., Acharya, A. (2013) Dislocation motion and instability, Journal of the
Mechanics and Physics of Solids, 61, 1835-1853.

10. Acharya, A., Knops, R. J., (2014) An observation on the experimental measurement of dislocation
density, Journal of Elasticity, 114, 275-279.

11. Tan, L., Acharya., A., Dayal, K. (2013) Coarse variables of autonomous ODE systems and their
evolution, Computer Methods in Applied Mechanics and Engineering, 253, 199-218.

12. Das, A., Acharya, A., Zimmer, J., Matthies, K. (2013) Can equations of equilibrium predict all
physical equilibria? A case study from Field Dislocation Mechanics, Mathematics and Mechanics of
Solids, 18, 801-820.

13. Acharya, A., Fressengeas, C. (2012) Coupled phase transformations and plasticity as a field theory of
deformation incompatibility. International Journal of Fracture, 174, 87-94, and Micromechanics of
Defects in Solids (Ed. P. Ariza).

14. Acharya, A., Knops. R.J. (2012) On the three-dimensional Filon construct for dislocations,
International Journal of Engineering Science, 59, 6-26.

15. Acharya, A., Dayal, K. (2014) Continuum mechanics of line defects in liquid crystals and liquid crystal
elastomers. Quarterly of Applied Mathematics, LXXII(1), 33-64, (Electronically published, 2013).

16. Slemrod, M., Acharya, A. (2012) Time-averaged coarse variables for multi-scale dynamics. Quarterly
of Applied Mathematics, LXX(4), 793-803.

17. Acharya, A., Tartar, L. (2011) On an equation from the theory of field dislocation mechanics, Bulletin
of the Italian Mathematical Union, (9)IV, 409-444.

18. Acharya, A. (2011) Microcanonical entropy and mesoscale dislocation mechanics and plasticity,
Journal of Elasticity, 104, 23-44.

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19. Puri, S., Das, A., Acharya, A. (2011) Mechanical response of multicrystalline thin films in mesoscale
field dislocation mechanics, Journal of the Mechanics and Physics of Solids, 59, 2400-2417.

20. Puri, S., Acharya, A., Rollett, A. (2011) Controlling Plastic Flow across Grain Boundaries in a
Continuum Model, Metallurgical and Materials Transactions A, 42(A), 669-675.

21. Fressengeas, C., Acharya, A., Beaudoin, A. J., (2010) Dislocation mediated continuum plasticity: case
studies on modeling scale-dependence, scale-invariance, and directionality of sharp yield point, in
Computational methods for microstructure-property relationships, ed. Ghosh-Dimiduk, Springer, 277-
309.

22. Acharya, A., Matthies, K., Zimmer, J. (2010) Travelling wave solutions for a quasilinear model of
field dislocation mechanics, Journal of the Mechanics and Physics of Solids, 58, 2043-2053.

23. Acharya, A. (2010) New inroads in an old subject: Plasticity, from around the atomic to the
macroscopic scale, Journal of the Mechanics and Physics of Solids, 58, 766-778.

24. Mach, J. C., Beaudoin, A. J., Acharya, A. (2010) Continuity in the plastic strain rate and its influence
on texture evolution, Journal of the Mechanics and Physics of Solids, 58, 105-128.

25. Acharya, A. (2010) Coarse-graining autonomous ODE systems by inducing a separation of scales:
Practical strategies and mathematical questions, Mathematics and Mechanics of Solids, 15, 342-352.

26. Puri, S., Roy, A., Acharya, A., Dimiduk, D. (2009) Modeling dislocation sources and size effects at
initial yield in continuum plasticity, Journal of Mechanics of Materials and Structures, 4(9), 1603-
1618.

27. Acharya, A. (2009) On the use of thermodynamic formalism in generalized continuum theories and a
mesoscopic model for damage evolution, ASCE Journal of Engineering Mechanics, 135(3), 171-177.

28. Taciroglu, E., Acharya, A., Namazifard, A., Parsons, I. D. (2009) Arbitrary Lagrangian-Eulerian
methods for analysis of regressing solid domains and interface tracking, Computers and Structures, 87,
355-367.

29. Acharya, A., Beaudoin, A., Miller, R. (2008) New perspectives in Plasticity theory: dislocation
nucleation, waves, and partial continuity of plastic strain rate, Mathematics and Mechanics of Solids,
13, 293-315.

30. Acharya, A. (2007) On the choice of coarse variables for dynamics, International Journal for
Multiscale Computational Engineering, 5, 483-489.

31. Acharya, A. (2007) Jump condition for GND evolution as a constraint on slip transmission at grain
boundaries, Philosophical Magazine A, 1349-1359.

32. Varadhan, S., Beaudoin, A. J., Acharya,A., Fressengeas, C. (2006) An explicit Galerkin/Least Squares
method for dislocation transport, Modelling and Simulation in Materials Science and Engineering, 14,
1245-1270.

33. Roy, A., Puri, S., and Acharya, A. (2006) Phenomenological Mesoscopic Field Dislocation
Mechanics, Lower-order Gradient Plasticity, and transport of mean excess dislocation density,
Modelling and Simulation in Materials Science and Engineering, 15, S167-180.

34. Acharya, A. and Sawant, A. (2006) On a computational approach for the approximate dynamics of
averaged variables in nonlinear ODE systems: toward the derivation of constitutive laws of the rate
type, Journal of the Mechanics and Physics of Solids, 54, 2183-2213.
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35. Sawant, A. and Acharya, A. (2006) Model reduction via parametrized locally invariant manifolds:
Some examples, Computer Methods in Applied Mechanics and Engineering, 195, 6287-6311.

36. Acharya, A, Roy, A., Sawant, A. (2006) Continuum theory and methods for coarse-grained,
mesoscopic plasticity, In: Viewpoint Set on Statistical Mechanics and coarse graining of dislocation
behavior for continuum plasticity, Scripta Materialia, 54, 705-710.

37. Acharya, A. and Roy, A. (2006) Size effects and idealized dislocation microstructure at small scales:
predictions of a phenomenological model of Mesoscopic Field Dislocation Mechanics: Part I, Journal
of the Mechanics and Physics of Solids, 54, 1687-1710.

38. Roy, A. and Acharya, A. (2006) Size effects and idealized dislocation microstructure at small scales:
predictions of a phenomenological model of Mesoscopic Field Dislocation Mechanics: Part II, Journal
of the Mechanics and Physics of Solids, 54, 1711-1743.

39. Acharya, A. (2005) Parametrized invariant manifolds: a recipe for multiscale modeling? Computer
Methods in Applied Mechanics and Engineering, 194, 3067-3089.

40. Tang, H., Acharya, A., Saigal, S. (2005) Directional dependence of crack growth along the interface of
a bicrystal with symmetric tilt boundary in the presence of gradient effects, Mechanics of Materials,
37, 593-606.

41. Roy, A. and Acharya, A. (2005) Finite element approximation of field dislocation mechanics, Journal
of the Mechanics and Physics of Solids, 53, 143-170.

42. Tang, H., Choi, Y. S., Acharya, A., and Saigal, S. (2004) Effects of lattice incompatibility induced
hardening on the fracture behavior of ductile single crystals, Journal of the Mechanics and Physics of
Solids, 52, 2841-2867.

43. Miller, R. E., and Acharya, A. (2004) A stress-gradient based criterion for dislocation nucleation in
crystals, Journal of the Mechanics and Physics of Solids, 52, 1507-1525.

44. Acharya, A., Tang, H., Saigal, S., and Bassani, J. L. (2004) On boundary conditions and plastic strain-
gradient discontinuity in lower-order gradient plasticity, Journal of the Mechanics and Physics of
Solids, 52, 1793-1826.

45. Acharya, A. (2004) Constitutive Analysis of finite deformation field dislocation mechanics, Journal of
the Mechanics and Physics of Solids, 52, 301-316.

46. Acharya, A. (2003) Driving forces and boundary conditions in continuum dislocation mechanics,
Proceedings of the Royal Society, A, 459, 1343-1363.

47. Acharya, A., Bassani, J. L., and Beaudoin, A. J. (2003) Geometrically necessary dislocations,
hardening, and a Simple gradient theory of crystal plasticity, Scripta Materialia, 48, 167-172.

48. Beaudoin, A. J. and Acharya, A. (2001) A model for rate-dependent flow of metal polycrystals based
on the slip plane lattice incompatibility, Materials Science and Engineering, A-309-310, 411-415.

49. Acharya, A. (2001) A model of crystal plasticity based on the theory of continuously
distributed dislocations, Journal of the Mechanics and Physics of Solids, 49, 761-784.

50. Acharya, A. and Bassani, J. L. (2000) Lattice incompatibility and a gradient theory of crystal plasticity,
Journal of the Mechanics and Physics of Solids, 48, 1565-1595.

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51. Acharya, A. and Beaudoin, A. J. (2000) Grain-size effect in FCC viscoplastic polycrystals at moderate
strains, Journal of the Mechanics and Physics of Solids, 48, 2213-2230.

52. Beaudoin, A. J., Acharya, A., Chen, S. R., Korzekwa, D. A. and Stout, M. G. (2000) Consideration of
grain-size effect and kinetics in the plastic deformation of metal polycrystals, Acta Materialia, 48,
3409-3423.

53. Acharya, A. (2000) A nonlinear generalization of the Koiter-Sanders-Budiansky bending strain
measure, International Journal of Solids and Structures, 37, 5517-5528.

54. Acharya, A. (2000) A distinct element approach to Ball Mill mechanics, Communications in
Numerical Methods in Engineering, 16, 743-753.

55. Acharya, A. (1999) On compatibility conditions for a Left Cauchy-Green strain field in 3-dimensions,
Journal of Elasticity, 56, 95-105.

56. Acharya, A., Cherukuri, H. P. and Govindarajan, R. M. (1999) A new proposal in gradient plasticity:
theory and application in 1-d quasi-statics and dynamics, Mechanics of Cohesive-Frictional Materials,
4, 153-170.

57. Acharya, A. and Shawki, T. G. (1996) The Clausius-Duhem inequality and the structure of rate-
independent plasticity, International Journal of Plasticity, 12, 229-238.

58. Acharya, A. and Shawki, T. G. (1995) Thermodynamic restrictions on constitutive equations for
second-deformation-gradient inelastic behavior, Journal of the Mechanics and Physics of Solids, 43,
1751-1772.

(selected) Refereed Conference Proceedings

59. Acharya, A., and Zhang, X., (2015) From dislocation motion to an additive velocity gradient
decomposition, and some simple models of dislocation dynamics, Chinese Annals of Mathematics,
36B(5), 645-658. Proceedings of the International Conference on Nonlinear and Multiscale Partial
Differential Equations: Theory, Numerics and Applications held at Fudan University, Shanghai,
September 16-20, 2013, in honor of Luc Tartar.

60. Acharya, A. Fressengeas, C., (2015) Continuum mechanics of the interaction of phase boundaries and
dislocations in solids, in Differential Geometry and Continuum Mechanics, Ed: G. Q Chen, M.
Grinfeld, R.J. Knops, Springer Proceedings in Mathematics & Statistics, vol, 137, 125-168.

61. Acharya, A., and Chapman, S. J. (2012) Elementary observations on the averaging of dislocation
mechanics: dislocation origin of aspects of anisotropic yield and plastic spin, In: Linking Scales in
Computations: From Microstructure to Macro-scale Properties, Procedia IUTAM, 3, 297-309.

62. A counterpoint to Cermelli and Gurtin’s criteria for choosing the ‘correct’ geometric dislocation tensor
in finite plasticity. IUTAM Symposium on Theoretical, Computational, and Modelling Aspects of
Inelastic Media, Cape Town, S. Africa, (2007).

63. Consideration of lattice incompatibility in the evolution of hardening, Proceedings of the Twelfth
International Conference on Textures of Materials, National Research Council of Canada Press. With
Beaudoin, A. J. (1999)

64. Coupled simulation of solid rocket motors, AIAA paper 2000-3456, 36th. AIAA/ASME/SAE/ASEE
Joint propulsion conference and exhibit, Huntsville, Al. With Parsons, I. D. P., Alavilli, P., Fiedler, R.,
Jiao, X., and Namazifard, A. (2000)

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65. Loosely coupled simulations of solid rocket motors, 5th. National Congress on Computational
Mechanics (USACM), Boulder, Colorado, August. With Parsons, I. D. P., Alavilli, P. V. S.,
Namazifard, A., F. Najjar, D. Tafti, and X. Jiao (1999)

66. A space-time discontinuous Galerkin method for elastodynamic analysis, in Discontinuous Galerkin
Methods: Theory, Computation and Applications, Ed. B. Cockburn, G. Karriadakis and C. W. Shu,
Lecture Notes in Computational Science and Engineering, 11, 459-464, Springer Verlag. With Yin, L.,
Sobh, N., Haber, R. B. and Tortorelli, D. A. (1999)

67. On non-local theories that preserve the classical structure of incremental boundary value problems, in
IUTAM symposium on Micromechanics of Plasticity and Damage of Multiphase Materials, Ed. A.
Pineau and A. Zaoui, 3-9, Kluwer Academic Publishers. With Bassani, J. L. (1996)

68. Incompatible lattice deformations and crystal plasticity, in Plastic and Fracture Instabilities, AMD-vol.
200/MD-vol. 57, 75-80, ASME. With Bassani, J. L. (1995)

Seminars and Invited Presentations

1. Line defect dynamics and solid mechanics (with C. Zhang, X. Zhang, N. Walkington, J. Bielak, M.
Widom), Harvard Applied Mechanics Colloquium, March 2017.

2. Line defect dynamics and solid mechanics (with C. Zhang, X. Zhang, A. Garg, C. Maloney, M.
Widom), Dept. of Engineering mechanics seminar, Pennsylvania State University, October 2016.

3. Plasticity Models and Connections with Dislocation Theory (with various collaborators) Opening
Plenary Lecture at Dislocations 2016, a quadrennial International conference on the subject of
dislocations, Purdue University, September 2016.

4. Line defect dynamics and solid mechanics (with C. Zhang, X. Zhang, A. Garg, C. Maloney, M.
Widom), Conference on Recent Advances in Computational Methods for Nanoscale Phenomena, Univ.
of Michigan, Ann Arbor, August 2016.

5. Line defect dynamics and solid mechanics (with C. Zhang, X. Zhang, A. Garg, C. Maloney, M.
Widom), Center for Interdisciplinary Sciences, Tata Institute for Fundamental Research, Hyderabad,
India, July 2016.

6. Line defect dynamics and solid mechanics (with C. Zhang, X. Zhang, A. Garg, C. Maloney, M.
Widom), Advances in the Mathematical Analysis of Material Defects in Elastic Solids, SISSA, Trieste,
Italy, June 2016.

7. On the connection between Dislocation Mechanics and Continuum Plasticity, (with X. Zhang and S.
Puri), SIAM conference on Mathematical aspects of Materials Science, Philadelphia, May 2016.

8. Simulating Finite-Energy Disclination Dynamics by Modeling Discontinuous Director Fields (with C.
Zhang, X. Zhang, D. Golovaty, N. Walkington), SIAM conference on Mathematical aspects of
Materials Science, Philadelphia, May 2016.

9. Why gradient flows of some energies good for defect equilibria are not good for dynamics, and an
improvement (with Zhang, C., Zhang, X., Golovaty, D., Walkington, N. J.), University of Pittsburgh,
Mathematics Colloquium, March 2016.

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10. Modeling defected boundaries with g.disclination dipoles (with C. Zhang), Microstructure Evolution &
Interfaces Workshop, Oberwolfach Research Institute for Mathematics, Oberwolfach, Germany,
March 2016.

11. Line defect dynamics and solid mechanics (with C. Zhang and X. Zhang), Microstructure Evolution &
Interfaces Workshop, Oberwolfach Research Institute for Mathematics, Oberwolfach, Germany,
March 2016.

12. Why gradient flows of some energies good for defect equilibria are not good for dynamics, and an
improvement (with Zhang, C., Zhang, X., Golovaty, D., Walkington, N. J.), Center for Scientific
Computing and Mathematical Modeling and Applied Mathematics Seminar, Department of
Mathematics, University of Maryland, College Park, February, 2016.

13. A single theory for some quasi-static, supersonic, atomic, and tectonic scale applications of
dislocations (with X. Zhang, N. J. Walkington, J. Bielak), Dept. of Mechanical Engineering,
Technion., Haifa, Israel, January, 2016.

14. Why gradient flows of some energies good for defect equilibria are not good for dynamics, and an
improvement (with Zhang, C., Zhang, X., Golovaty, D., Walkington, N. J.), Mathematical Analysis
and Applications Seminar Weizmann Institute of Science, Rehovot, Israel, December, 2015.

15. Towards Macroscopic Plasticity from Microscopic Discrete Dislocation Dynamics (with Zhang, X.)
17th Mini-Workshop in Applied and Computational Mathematics, Weizmann Institute of Science,
Rehovot, Israel, December, 2015.

16. A single theory for some quasi-static, supersonic, atomic, and tectonic scale applications of
dislocations (with X. Zhang, N. J. Walkington, J. Bielak), Einstein Institute of Mathematics, Hebrew
University, Jerusalem, Israel, December, 2015.

17. Why gradient flows of some energies good for defect equilibria are not good for dynamics, and an
improvement (with Zhang, C., Zhang, X., Golovaty, D., Walkington, N. J.), Center for Doctoral
Training in Partial Differential Equations, Mathematical Institute, Oxford University, U.K., November,
2015.

18. Questions on coarse-graining dislocation dynamics, Workshop on Scales in Plasticity, Oberwolfach
Research Institute for Mathematics, Oberwolfach, Germany, November, 2015.

19. Why gradient flows of some energies good for defect equilibria are not good for dynamics, and an
improvement (with Zhang, C., Zhang, X., Golovaty, D., Walkington, N. J.), Workshop on Scales in
Plasticity, Oberwolfach Research Institute for Mathematics, Oberwolfach, Germany, November, 2015.

20. Why energy-minimizing dynamics of some energies good for defect equilibria are not good for
dynamics, and an improvement (with Zhang, C., Zhang, X., Golovaty, D., Walkington, N. J.),
Mathematical Landscapes Seminar, Univ. of Bath, U. K., October, 2015.
21. Line defect dynamics and solid mechanics (Zhang, C., X. Zhang, N. J. Walkington, J. Bielak),
Cambridge University, U.K., Dept. of Engineering, Micromechanics Seminar, October 2015.

22. A single theory for some quasi-static, supersonic, atomic, and tectonic scale applications of
dislocations (with X. Zhang, N. J. Walkington, J. Bielak), Workshop on Multiscale Modeling and
Analysis in Materials Science, Shanghai Jiao Tong University, Shanghai, China, August, 2015.

23. A study of dislocation nucleation in coarser-than-atomic scale models (with A. Garg, and C. E.
Maloney), Pan American Conference of Applied Mechanics, University of Illinois at Urbana
Champaign, June, 2015.

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24. A single theory for some quasi-static, supersonic, atomic, and tectonic scale applications of
dislocations (with X. Zhang, N. J. Walkington, J. Bielak), Pan American Conference of Applied
Mechanics , University of Illinois at Urbana Champaign, June, 2015.

25. Continuum mechanical modeling of the dynamics of dislocations, Short course consisting of five 2-
hour lectures, Scuola Internazionale Superiore di Studi Avanzati (SISSA), Trieste, Italy, April 13-17,
2015.

26. A single theory for some quasi-static, supersonic, atomic, and tectonic scale applications of
dislocations (with X. Zhang, N. J. Walkington, J. Bielak), Mach Conference, The Johns Hopkins
University, April, 2015.

27. A single theory for some quasi-static, supersonic, atomic, and tectonic scale applications of
dislocations (with X. Zhang, N. J. Walkington, J. Bielak), Penn Applied Mathematics and
Computational Science seminar, University of Pennsylvania, March, 2015.

28. A viewpoint for a continuum theory of defect dynamics in metallic glasses, Drucker Medallist
Symposium in honor of Prof. Lallit Anand at the Intl. Mechanical Engineering Conference and
Exhibition of the American Society of Mechanical Engineers, Montreal, Canada, November, 2014.

29. PDE dynamics of dislocations (with X. Zhang), Indian Institute of Technology, Kharagpur, India, July,
2014.

30. PDE dynamics of dislocations (with X. Zhang), IUTAM Symposium on Micromechanics of Defects in
Solids, Sevilla, Spain, June, 2014.

31. PDE dynamics of dislocations (with X. Zhang), USACM/IUTAM Symposium on Connecting
Multiscale Mechanics to Complex Materials Design, May, 2014.

32. PDE dynamics of dislocations (with X. Zhang), CISMMS-Civil Engineering Graduate Seminar Series,
The Johns Hopkins University, March, 2014.

33. PDE dynamics of dislocations (with X. Zhang), The Schöntal symposium on Dislocation based
Plasticity, Schöntal, Germany, February, 2014.

34. PDE dynamics of dislocations (with X. Zhang), University of Pittsburgh, PDE & Analysis seminar,
Pittsburgh, January, 2014.

35. PDE dynamics of dislocations (with X. Zhang), Louisiana State University, Dept. of Mathematics,
Baton Rouge, November, 2013.

36. PDE dynamics of dislocations (with X. Zhang), Bath Centre for Nonlinear Mechanics Seminar,
University of Bath, UK, October, 2013.

37. PDE dynamics of dislocations (with X. Zhang), PIRE-SISSA Workshop on Evolution Problems for
Material Defects, Trieste, Italy, Sept-Oct, 2013.

38. Field Dislocation Mechanics: a PDE model for studying plasticity from the atomic to the macroscopic
scale (with L. Tartar and X. Zhang), International Conference on Nonlinear and Multiscale Partial
Differential Equations: Theory, Numerics and Applications, Conference in honor of Prof. Luc Tartar,
Fudan University, Shanghai, China, September 2013.

39. What is fundamental - gauge fields or gauge invariance? A perspective from modeling defects in
continuum mechanics, SES Symposium in honor of D. J. Steigmann, Brown University, Providence,
July 2013.

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40. What is fundamental - gauge fields or gauge invariance? A perspective from modeling defects in
continuum mechanics, Workshop on Differential Geometry and Continuum Mechanics, ICMS,
Edinburgh, Scotland, June 2013.

41. Time-averaging of ODE systems with highly oscillatory response (with M. Slemrod and L. Tan),
SIAM Mathematics in Materials Science, Philadelphia, 2013.

42. Discontinuity and Incompatibility (with C. Fressengeas), Society of Engineering Science, Georgia
Tech, Atlanta, October, 2012.

43. Mesoscale Field Dislocation Mechanics, Multiscale Materials Modeling, Singapore, October, 2012.

44. Microcanonical Entropy and Mesoscale Dislocation Mechanics, Society of Engineering Science,
Georgia Tech, Atlanta, October, 2012.

45. Modeling of defects in amorphous materials, International Workshop on Computational Mechanics of
Materials, Baltimore, September, 2012.

46. Entropy of a constrained Hamiltonian system and a PDE model of damage, International Workshop on
Computational Mechanics of Materials, Baltimore, September, 2012.

47. Discontinuity and Incompatibility (with C. Fressengeas), Plasticity, 2012, San Juan, January 2012.

48. On an equation from the theory of Field Dislocation Mechanics (with L. Tartar) Society of Engineering
Science Annual Meeting, Northwestern University, October, 2011.

49. On the use of HEXDM data for characterizing and validating a mesoscale model of dislocation
plasticity? Argonne National Laboratory, High Energy X-ray Diffraction Measurement Workshop,
October, 2011.

50. Discontinuity and Incompatibility (with C. Fressengeas), University of Seville, Spain, International
Symposium on Defect and Materials Mechanics, July, 2011.

51. Entropy of a constrained Hamiltonian system and mesoscale mechanics, Universite Paul Verlaine,
Metz, France, June, 2011.

52. Entropy of a constrained Hamiltonian system and mesoscale mechanics, IUTAM symposium, Univ. of
Florida, May 2011.

53. Atomistic/Experimental connections for nonequilibrium mesoscale plasticity via equilibrium
statistical mechanics, Wright Patterson Air Force Base, Metallic Materials Division, April, 2011.

54. Continuum mechanics of liquid crystalline materials with defects (with K. Dayal), 12th International
Conference on Continuum Models and Discrete Systems, Saha Institute of Nuclear Physics, Kolkata,
India, February, 2011.

55. What is the nature of stochasticity in coarse response that arises from an underlying deterministic fine
theory? Multiscale Fundamentals Debate, NSF CMMI Grantees Conference moderated by Steve
McKnight, Division Director, CMMI, January, 2011.

56. Multiscale Modeling for Engineering Materials: where rubber meets the road for applied dynamical
systems, equilibrium statistical mechanics, and continuum thermodynamics, NSF workshop on
challenges and opportunities for research in multiscale modeling in Mechanics and Materials (M4),
Atlanta, January 2011.

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