Buckling and twisting of advanced materials into morphable 3D mesostructures
In this work, we present concepts that allow controlled introduction of buckling and twisting deformations to the mechanically guided assembly of 3D mesostructures.
research
Winners & Finalists of the 31th Edition of the Annual Robert J. Melosh Competition at Duke University
The winner of the 2019 Robert J. Melosh Medal is Dewen Yushu (University of Notre Dame), who presented the paper "The data-driven multiscale multigrid solver, preconditioner and reduced-order model."
Congratulations also to the other finalists! They are listed below, with their respective papers:
Siddhant Kumar, California Institute of Technology and ETH Zurich "Enhanced local maximum-entropy approximation for stable meshfree simulations;"
Unified finite element formulation for computational solid mechanics
Dear iMechanica members,
I have recently proposed a novel finite element framework for computational solid mechanics. I hope you find it interesting. I appreciate any feedback.
Towards addressing some long-standing issues in performing explicit elastodynamic simulations of incompressible hyperelastic and elastoplastic material models, finite element formulations based on Bézier elements are developed. The formulations are based on quadratic Bézier triangular and tetrahedral elements. You can download the papers from the following links.
Electronic structure study regarding the influence of macroscopic deformations on the vacancy formation energy in aluminum
Dear Colleagues,
Here is our recently published article about the influence of macroscopic deformations on vacancies in Aluminum.
Title: Electronic structure study regarding the influence of macroscopic deformations on the vacancy formation energy in aluminum
Authors: Swarnava Ghosh, Phanish Suryanarayana*
A micromechanical model for the growth of collagenous tissues under mechanics-mediated collagen deposition and degradation
In this study, we developed a micromechanical model for the growth and remodeling of a soft tissue based on the concurrent action of collagen deposition and degradation. We assumed in the model that collagen degradation causes a reduction in the fiber radius, while collagen deposition can increase both the radius and length of the collagen fibers growing under load. The latter arises from the assumption that collagen is deposited in an unstressed state, which increases the reference length of a fiber growing under mechanical load.
Bifurcation instability of substrate-supported metal films under biaxial in-plane tension
The stretchability of metal materials is often limited by the onset and development of necking instability. For instance, necking of lithium metal often occurs at low strains and thus hinders its practical applications in stretchable lithium batteries. Substrate/metal bilayers are emerging as a promising solution to the stringent stretchability requirement of metal electrodes and current collectors in flexible and stretchable batteries.
Laser manipulated wrinkling patterns
Smart soft materials, because of their mechanical flexibility and quick response to multi-physics stimuli, have drawn considerable attention over the past few years. Here, we present controllable wrinkling patterns of a liquid crystal polymer film attached on a soft substrate, controlled by laser illumination that holds unique optical characteristics of high coherence and irradiance.