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

Acharya, A (2020) A Possible Link between Brittle and Ductile Failure by Viewing Fracture as a Topological Defect, in press Comptes Rendus Mécanique.

Chatterjee, S., Po,G., Zhang, X., Acharya, A., Ghoniem, N. (2020) Plasticity Without Phenomenology: A First Step.

Arora, R., Acharya, A. (2020) A Unification of Finite Deformation J2 Von-Mises Plasticity and Quantitative Dislocation Mechanics.

Zhang, C., Acharya,A., Newell, A. C., Venkataramani, S. C. (2020) Computing with Non-Orientable Defects: Nematics, Smectics, and Natural Patterns.

Arora, R., Zhang, X., Acharya, A. (2019-2020) Finite Element Approximation of Finite Deformation Dislocation Mechanics, (in press) Computer Methods in Applied Mechanics and Engineering.

Arora, R., 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).

Acharya, A., Fosdick, R. (2019) Some Preliminary Observations On a Defect Navier-Stokes System, Comptes Rendus Mecanique, 347, 677-684.

Acharya, A. (2019) Stress of a Spatially Uniform Dislocation Density Field, Journal of Elasticity, 137, 151-155. (electronically published, January 7, 2019)

Acharya, A., Knops, R. J., Sivaloganathan, J. (2019) On the Structure of Linear Dislocation Field Theory, Journal of the Mechanics and Physics of Solids, 130, 216-244.

Acharya, A. (2019) A Design Principle for Actuation of Nematic Glass Sheets, Journal of Elasticity, 136, 237-249 (electronically published, September 19, 2018).

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