research

Chloé Arson, Ph.D.

Professor, Cornell University School of Civil and Environmental Engineering

Amit Acharya

A methodology for defining variational principles for a class of PDE models from continuum mechanics is demonstrated, and some of its features explored. The scheme is applied to quasi-static and dynamic models of rate-independent and rate-dependent, single crystal plasticity at finite deformation.

This article will appear in Soft Matter (https://doi.org/10.1039/D3SM00664F)

A Dimensionally-Reduced Nonlinear Elasticity Model for Liquid Crystal Elastomer Strips with Transverse Curvature

Kevin LoGrande (1, 2), M. Ravi Shankar (3) and Kaushik Dayal (1, 4, 5)

1Department of Civil and Environmental Engineering, Carnegie Mellon University

2Computation and Information Sciences Directorate, CCDC Army Research Lab

On Tuesday 24th October at 3:00 pm (Italian time) Samuel Forest will offer the seminar “Strain gradient plasticity based on saturating internal variables” at the Department of Civil, Environmental, Architectural Engineering and Mathematics of the University of Brescia (Italy). Here attached please find the abstract of the seminar. 

Anyone may directly join online through Google Meet at 

https://meet.google.com/rad-ehjg-ker

cdmHUB invites you to attend the Global Composites Experts Webinar Series. 

Title: Structural self-sensing based on measuring the resistance, capacitance or inductance of the structural material, without sensor incorporation

Speaker:  Dr. D. D. L. Chung, University at Buffalo

Time: 10/26, 11AM-12PM EST.

Register in advance for this webinar: https://bit.ly/DDLChung.

The problem of the detachment of a sufficiently large flat indenter from a plane adhesive viscoelastic strip of thickness “b” is studied. For any given retraction speed, three different detachment regimes are found: (i) for very small “b” the detachment stress is constant and equal to the theoretical strength of the interface, (ii) for intermediate values of “b” the detachment stress decays approximately as b−1/2, (iii) for thick layers a constant detachment stress is obtained corresponding to case the punch is detaching from a halfplane.

This study presents a computational approach to obtain nonlinearly elastic constitutive relations of strip/ribbon-like structures modeled as a special Cosserat rod. Starting with the description of strips as a general Cosserat plate, the strip is first subjected to a strain field which is uniform along its length. The Helical Cauchy-Born rule is used to impose this uniform strain field which deforms the strip into a six-parameter family of helical configurations-the six parameters here correspond to the six strain measures of rod theory.