research

We present the first mixed mode phase-field model of ductile fracture. The contribution of crack opening and shearing deformations to the propagation of a crack is expressed by introducing two phase fields. Constitutive relations are then introduced to couple and distinguish these phase fields. Special attention is given to the maximum shear stress and its effect on the development of fractures. The proposed model is validated by tensile testing experiments found in the literature on Al 2024 T-351.

Characterization and Prediction of Polymer/Active Material Interface Failure in Battery Electrodes

Abstract:

Extreme Mechanics Letters (EML) is pleased to announce the initiation of an EML - Early Career Advisory Board (EML-ECAB) program to promote outstanding early career researchers and engage them in a path towards editorial services and contributions.

By Tianzhen Liu, Yuzhen Chen, John W. Hutchinson, Lihua Jin

Graphical Abstract (from Publication 2 below):

Abstract:

Liu, M., Domino, L., de Dinechin, I. D., Taffetani, M., & Vella, D.* (2023). Snap-induced morphing: From a single bistable shell to the origin of shape bifurcation in interacting shells. J Mech. Phys. Solids, 170, 105116.

In this paper we formulate the initial-boundary value problem of accreting circular cylindrical bars under finite torsion. It is assumed that the bar grows as a result of printing stress-free cylindrical layers on its boundary while it is under a time-dependent torque (or a time-dependent twist) and is free to deform axially. In a deforming body, accretion induces eigenetrains, and consequently residual stresses. We formulate the anelasticity problem by first constructing the natural Riemannian metric of the growing bar.

Yijie Cai, Jie Ma, Zihang Shen, Xianmin Shao, Zheng Jia *, Shaoxing Qu, Enhancing the fracture resistance of hydrogels by regulating the energy release rate via bilayer designs: Theory and experiments, Journal of the Mechanics and Physics of Solids, 170, 105125 (2023)