184 citations · 506 across the 39 of their papers we have counts for
9 papers · 1 filter
A unification of finite deformation Von-Mises plasticity and quantitative dislocation mechanics
Rajat Arora, Amit Acharya
We present a framework which unifies classical phenomenological and crystal plasticity theories with quantitative dislocation mechanics. The theory allows the computation of…
Computing with non-orientable defects: nematics, smectics and natural patterns
Chiqun Zhang, Amit Acharya, Alan C. Newell +1
Defects are a ubiquitous feature of ordered media. They have certain universal features, independent of the underlying physical system, reflecting their topological origins. While…
Continuum mechanics of moving defects in growing bodies
Amit Acharya, Shankar C. Venkataramani
Growth processes in many living organisms create thin, soft materials with an intrinsically hyperbolic geometry. These objects support novel types of mesoscopic defects - discontin…
A design principle for actuation of nematic glass sheets
Amit Acharya
A continuum mechanical framework is developed for determining a) the class of stress-free deformed shapes and corresponding director distributions on the undeformed configuration o…
Finite element approximation of the fields of bulk and interfacial line defects
Chiqun Zhang, Amit Acharya, Saurabh Puri
A generalized disclination (g.disclination) theory [AF15] has been recently introduced that goes beyond treating standard translational and rotational Volterra defects in a continu…
Computational modeling of tactoid dynamics in chromonic liquid crystals
Chiqun Zhang, Amit Acharya, Noel J. Walkington +1
Motivated by recent experiments, the isotropic-nematic phase transition in chromonic liquid crystals is studied. As temperature decreases, nematic nuclei nucleate, grow, and coales…
On the relevance of generalized disclinations in defect mechanics
Chiqun Zhang, Amit Acharya
The utility of the notion of generalized disclinations in materials science is discussed within the physical context of modeling interfacial and bulk line defects like defected gra…
A non-traditional view on the modeling of nematic disclination dynamics
Chiqun Zhang, Xiaohan Zhang, Amit Acharya +2
Nonsingular disclination dynamics in a uniaxial nematic liquid crystal is modeled within a mathematical framework where the kinematics is a direct extension of the classical way of…
A fundamental improvement to Ericksen-Leslie kinematics
Hossein Pourmatin, Amit Acharya, Kaushik Dayal
We demonstrate theory and computations for finite-energy line defect solutions in an improvement of Ericksen-Leslie liquid crystal theory. Planar director fields are considered in…