research

EML Webinar on 9 December 2020 will be given by Jian Ping Gong, Hokkaido University. Discusion Leader: Rong Long, University of Colorado.

Title: Self-Growing and Strengthening of Double Network Hydrogels by Mechanical Training

Time: 8 am Boston, 1 pm London, 2 pm Paris, 9 pm Beijing on 9 December 2020

This work addresses the determination of yield surfaces for geometrically exact elastoplastic rods. Use is made of a formulation where the rod is subjected to an uniform strain field along its arc length, thereby reducing the elastoplastic problem of the full rod to just its cross-section. By integrating the plastic work and the stresses over the rod's cross-section, one then obtains discrete points of the yield surface in terms of stress resultants. Eventually, Lamé curves in their most general form are fitted to the discrete points by an appropriate optimisation method.

Dear iMechanicians, I hope that our latest JMPS paper is of interest to you. We show how the phase field paradigm can be extended to model localised corrosion (aqueous electrolyte-solid interface) and the associated damage mechanisms. 

C. Cui, R. Ma, E. Martínez-Pañeda. A phase field formulation for dissolution-driven stress corrosion cracking. Journal of the Mechanics and Physics of Solids 147, 104254 (2021)

https://www.sciencedirect.com/science/article/pii/S0022509620304622

A central tool of nonlinear anelasticity is the multiplicative decomposition of the deformation tensor that assumes that the deformation gradient can be decomposed as a product of an elastic and an anelastic tensor. It is usually justified by the existence of an intermediate configuration. Yet, this configuration cannot exist in Euclidean space, in general, and the mathematical basis for this assumption is on unsatisfactory ground.

3D Printing of Batteries: Fabrication, Materials and Challenges 

Yaokun Pang, Changyong Cao*

Laboratory for Soft Machines & Electronics, Michigan State University

1. Introduction