Carnegie Mellon University

Amit Acharya

Amit Acharya

Professor

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 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  AIS 

  • 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

Recent Publications

Full Publications List

Zhang,C.,  Acharya, A., Newell, A.C., and Venkataramani, S.C. (2021), Computing with Non-Orientable Defects: Nematics, Smectics and Natural Patterns, Physica D: Nonlinear Phenomena, 417, 132828.

Chatterjee, S., and Acharya, A., (2020) How Useful are Formal Hierarchies? A Case Study on Averaging Dislocation Dynamics to Define Meso-Macro Plasticity, International Journal of Multiscale Computational Engineering,18(5), 587-610.

Acharya, A., (2020) A Possible Link Between Brittle and Ductile Failure by Viewing Fracture as a Topological Defect, Comptes Rendus Mécanique, 348(4), 275-284.

Acharya,A., and Viñals, J., (2020) Field Dislocation Mechanics and Phase Field Crystal Models, Physical Review B, 102, 064109.

Arora, R., and Acharya, A., (2020) A Unification of Finite Deformation J2 Von-Mises Plasticity and Quantitative Dislocation Mechanics,  Journal of the Mechanics and Physics of Solids, 143, 104050.

Sabyasachi Chatterjee, Giacomo Po, Xiaohan Zhang, Amit Acharya, Nasr Ghoniem (2020) Plasticity without phenomenology: a first stepJournal of the Mechanics and Physics of Solids, 143, 104059.

Rajat Arora, Xiaohan Zhang, Amit Acharya (2020)  Finite Element Approximation of Finite Deformation Dislocation Mechanics, Computer Methods in Applied Mechanics and Engineering, 367, 113076.

Arora, R., and Acharya, A., (2020) Dislocation Pattern Formation in Finite Deformation Crystal Plasticity, International Journal of Solids and Structures (invited contribution for special issue in honor of Dominique Jeulin), 184, 114-135 (electronically published, February 26, 2019).

Zhang, C., and Acharya, A., (2018) On the Relevance of Generalized Disclinations in Defect Mechanics,  Journal of the Mechanics and Physics of Solids, 119, 188-223.

Zhang, C., Acharya, A., and Puri, S., (2018) Finite Element Approximation of Fields of Bulk and Interfacial Line DefectsJournal of the Mechanics and Physics of Solids, 114, 258-302.

Recent Honors and Awards

  • Visitng Professorship with the Instituto Nazionale di Alta Matematica Francesco Severi (INdAM). Univeristy of Pavia, Italy (2016)
  • Rosi and Max Varon Visitng Professorship. Weizmann Institute of Scinee, Israel (2015)
  • Visiting Professorship of the Leverhulm Trust. University of Bath, U.K. (2015)

Courses

  • 12-231 Solid Mechancis
  • 12-335 Soil Mechanics
  • 12-758 Intro to Continuum Mechanics Nonlinear Elastic & Structural Mechanics