# Amit Acharya

## Professor, Civil and Environmental Engineering

**Address:**

Civil & Environmental Engineering

Carnegie Mellon University

Pittsburgh, PA 15213-3890

**Office:**Porter Hall 101

**Phone:**412-268-4566

**Fax:**412-268-7813

**Email:**acharyaamit@cmu.edu

**Website:**http://faculty.ce.cmu.edu/acharya/

## Bio

Amit Acharya is a professor in the Mechanics, Materials, and Computing research group. His research interests are in the areas of continuum mechanics, mathematical materials science, and applied mathematics and looks at how structural imperfections, or defects, in crystalline materials interact and evolve. Currently, his work focuses on theoretical and computational defect mechanics in crystalline, liquid crystalline, and metallic glass systems, coarse-graining of nonlinear time-dependent systems, and the interplay of differential geometry and structural mechanics in the design and actuation of thin sheets.Acharya received his PhD in Theoretical & Applied Mechanics from the University of Illinois at Urbana-Champaign (UIUC) in 1994. Subsequently, he completed a post-doctoral position at the University of Pennsylvania.

From 1995-1998, he took a position as a senior research engineer in the ABAQUS Std Development group at HKS, Inc. in Providence, RI (now Simulia, Dassault Systemes). While there, Acharya was the lead developer of the *Hysteresis nonlinear viscoelastic material model and the S4 fully-integrated finite strain shell element. These are still in use in the ABAQUS general-purpose FE code. Between 1998-2000, Acharya was a research scientist at the DOE-ASCI funded Center for Simulation of Advanced Rockets at UIUC before finally joining CMU in 2000.

Courtesy Appointment: MSE

Research Group: MMC

## Education

PhD 1994 - University of Illinois, Urbana-Champaign

MS 1991 - University of Utah

BS 1988 - Indian School of Mines, India

## Areas of Interest

- Continuum dislocation mechanics
- Coarse-graining of nonlinear evolutionary systems
- Computational modeling of elastic and inelastic behavior of solids
- Nonlinear shell theory
- Fluid-structure interaction including mass transfer

## Selected Publications

- Acharya, A., Zhang, X. (2015) “From dislocation motion to an additive velocity gradient decomposition, and some simple models of dislocation dynamics,” 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. To appear in
*Chinese Annals of Mathematics, Series B*. - Acharya, A., Fressengeas, C. (2015) “Continuum mechanics of the interaction of phase boundaries and dislocations in solids,” To appear in Springer Proceedings in Mathematics and Statistics for Workshop on Differential Geometry and Continuum Mechanics held at the Intl. Centre for Mathematical Sciences in Edinburgh. Ed: G. Q Chen, M. Grinfeld, R.J. Knops.
- 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. - Acharya, A., Knops, R. J. (2014) “An observation on the experimental measurement of dislocation density,”
*Journal of Elasticity*, 114: 275-279. - 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. - Zhu, Y., Chapman, S. J., Acharya, A. (2013) “Dislocation motion and instability,”
*Journal of the Mechanics and Physics of Solids*, 65: 1835-1853.