Carnegie Mellon University

Amit Acharya

Amit Acharya

Professor, Civil and Environmental Engineering

Address
Civil & Environmental Engineering
Carnegie Mellon University
Pittsburgh, PA 15213-3890

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             

Education

PhD 1994 - University of Illinois, Urbana-Champaign
MS 1991 - University of Utah
BS 1988 - Indian School of Mines, India

Research

Research Group: MMC

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

Publications

Acharya, A., Widom M. (2017), “A Microscopic Continuum Model for Defect Dynamics in Metallic Glasses,” Journal of the Mechanics and Physics of Solids, in press.

Zhang, Chiqun, Zhang, Xiaohan, Acharya, Amit, Golovaty, Dmitry, and Noel Walkington. (2016), "A Non-Traditional View on the Modeling of Nematic Disclination Dynamics,Quarterly of Applied Mathematics, LXXV, 309-357. (electronically published on August 18, 2016).

Acharya, Amit, Lewicka, Marta and Mohammad Reza Pakzad. (2016). "The metric-restricted inverse design problem," Nonlinearity, 29, 1769-1797.

Das,A., Acharya, and A., Suquet, P. (2016) "Microstructure in Plasticity Without Nonconvexity," Computational Mechanics,  57, 387-403. 

Acharya, A., Fressengeas, C., (2015), “Continuum Mechanics of the Interaction of Phase Boundaries and Dislocations in Solids,” Differential Geometry and Continuum Mechanics, vol, 137, 125-168.

Zhang, X., Acharya, A., Walkington, N. J., Bielak, J. (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.