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Fracture in distortion gradient plasticity

Submitted by Emilio Martíne… on
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#Plasticity #fracture

Dear iMechanicians,

I hope that the following paper is of interest to you. We use for the first time Gurtin (2004) gradient plasticity theory to investigate crack tip mechanics, revealing the existence of an elastic core adjacent to the crack tip, resembling a dislocation-free zone. Also, we show that the combination of strain gradient hardening and dislocation blockage can rationalise brittle fracture in elastic-plastic material interfaces.

Journal Club for September 2020: The Biofilm Matrix - A Living Engineering Material

Submitted by Jingjie Yeo on
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jClub
biofilm
matrix
extracellular polymeric substances
biopolymers
engineering living materials

The Biofilm Matrix - A Living Engineering Material

Chenxi Zhai, Haoyuan Shi, Tianjiao Li, Liming Zhao, Jingjie Yeo

J2 Lab for Engineering Living Materials, Sibley School of Mechanical and Aerospace Engineering, Cornell University

Introduction

EML Webinar by Prof. Costantino Crest on 2 September 2020: Using light emission to report damage in soft materials. Can we be quantitative?

Submitted by Teng Li on
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EML
EML Webinar

EML Webinar on 2 September 2020 will be given by Prof.  Costantino Creton, ESPCI Paris. Discussion leader: Tian Tang, University of Alberta.

Title: Using light emission to report damage in soft materials. Can we be quantitative?

Time: 7 am California, 10 am Boston, 3 pm London, 10 pm Beijing on 2 September 2020

Beam to surface contact dynamics using a corotational formulation and discrete SDF

Submitted by miquel.aguirre on
research

Please check our new article on beam to surface contact modeling, recently accepted in  Computer Methods in Applied Mechanics and Engineering: https://doi.org/10.1016/j.cma.2020.113275 . We have used a previously reported dynamic corotational formulation and added frictional contact terms, which provide a fully consistent formulation.

Modeling SMA-enabled soft deployable structures for kirigami/origami reflectors

Submitted by Jinxiong Zhou on
research
# Finite Element modeling; Shape Memory Alloy; Kirigami; Deployable Structure

The synergic combination of smart soft composites with kirigami/origami principles leads to self-deployable systems. To date, the development of soft deployable structures has largely been an empirical process. Focusing on the recently developed shape memory alloy (SMA)-based soft deployable structures, this paper describes an analytical model and a finite element (FE) numerical scheme to investigate deformation and deployment performance of this system.

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