Teng zhang's blog

Two Ph.D. positions are available immediately in the Department of Mechanical Engineering at University of Mississippi (Ole Miss). The positions can be started as early as Jan 23, 2019 if possible.  Successful candidates will participate in a vibrant interdisciplinary and collaborative research group in our Blast and Impact Dynamics Lab and Additive Manufacturing for Research and Education Cluster (AMREC) at Ole Miss, and be involved in projects pursuing research in the field of shockwave/high-strain rate impact simulations, material and constitutive modeling, and failure analysis.

Teng Zhang

Department of Mechanical and Aerospace Engineering, Syracuse University

Introduction

Lattice models are popular methods for simulating deformation of solids by discretizing continuum structures into spring networks. Despite the simplicity and efficiency, most lattice models only rigorously converge to continuum models for lattices with regular shapes. Here, we derive a lattice model for neo-Hookean solids directly from finite element methods (FEM). The proposed lattice model can handle complicated geometries and tune the material compressibility without significantly increasing the complexity of the model.

Dear Colleague,

The next Engineering Mechanics Institute Conference (EMI) will take place from May 29th to June 1st, 2018, at MIT.

As organizers of the Mini-Symposium MS20 “Nonlinear mechanics of highly deformable solids and structures”, it is our pleasure to invite you and your students to participate in our mini symposium.
The deadline for abstract submission is January 31st, 2018.

A link to the conference website and abstract submission portal is: https://umi.mit.edu/EMI2018

Abstract

Soft materials including elastomers and gels are pervasive in biological systems and technological applications. Whereas it is known that intrinsic fracture energies of soft materials are relatively low, how the intrinsic fracture energy cooperates with mechanical dissipation in process zone to give high fracture toughness of soft materials is not well understood. In addition, it is still challenging to predict fracture energies and crack-tip strain fields of soft tough materials.

We have read some papers of stroh formalism and the textbook of Tom Ting, and found that the stroh formalism and the hamilton system proposed by prof.zhong wanxie had some relation. We want to know whether the stroh formalism is enough for the analysis of the anisotropic elastic? Thus's to say, for some problems could not  give the satisfied answer which we may try the hamilton framework. I briefly compare the two methods as follows: