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Oblique wrinkling patterns on liquid crystal polymer core–shell cylinders under thermal load

Submitted by Fan Xu on

Smart soft materials, which can flexibly respond to external multi-physics stimuli, have attracted considerable attention over the past few years. Here, we present tunable wrinkling patterns in cylindrical core-shell systems under thermal load via the orientation of director in nematic liquid crystal polymer (LCP). To quantitatively analyze mechanical behavior and morphological evolution of LCP core-shell cylinders, we develop a core-shell model that accounts for director-induced anisotropic spontaneous strains.

EML Webinar by Prof. Vikram Deshpande on ballistic and blast response of structural materials: lessons from architecting materials

Submitted by Teng Li on

EML Webinar on November 18, 2020 will be given by Professor Vikram Deshpande, The University of Cambridge. Discussion leader: Professor Lihua Jin, UCLA

Title: Ballistic and blast response of structural materials: lessons from architecting materials 

Time: 7 am California, 9:30 am Boston, 2:30 pm London, 10:30 pm Beijing on November 18, 2020

A new continuum model for metallic glass based on thermodynamics

Submitted by Xiaoding Wei on

My group at Peking University proposed a novel mechano-chemical continuum model based on the framework of thermodynamics that can describe the microstructural evolution in metallic glass, and connect it with the macroscopic plastic deformation. The model successfully simulated the shear band instability and dilatancy effects of metallic glass under uniaxial tension and simple shear.

VUMAT viscoelasticity (Maxwell model)

Submitted by surot on

Dear all,

I would like to ask you for advice. I am about to simulate a pull-through test (see attached picture) of a cladding panel made of a material with highly viscoelastic behaviour. I have parameters for Maxwell model (Prony series) obtained from test. I expect large deformation and probably cone failure (or tearing of the cladding panel). Therefore I would like to use Abaqus/Explicit. The problem is that I cannot use *visco step together with Explicit. Is there any way to solve it?

EML Webinar on 11 November 2020 on Mechanobiology: A Tale of Stressed Life by Sulin Zhang

Submitted by Teng Li on

EML Webinar on 11 November 2020 will be given by Sulin Zhang, Penn State University. Discussion leader: Teng Li, University of Maryland

Title: Mechanobiology: A Tale of Stressed Life

Time: 9:30 am Boston, 2:30 pm London, 3:30 pm Paris, 10:30 pm Beijing on 11 November 2020

Zoom Link: https://harvard.zoom.us/j/271079684 

Phase field modelling of fracture and fatigue in Shape Memory Alloys

Submitted by Emilio Martíne… on

Dear iMechanicians. I hope that the following paper is of interest to you. We develop the first phase field formulation for fracture (and fatigue) in Shape Memory Alloys. Its potential is demonstrated by solving a variety of paradigmatic 2D and 3D boundary value problems, from R-curves to fatigue cracking of a NiTi biomedical stent.

M. Simoes, E. Martínez-Pañeda. Phase field modelling of fracture and fatigue in Shape Memory Alloys. Computer Methods in Applied Mechanics and Engineering 373 (2021) 113504

EML Webinar on 4 November 2020 on Topological adhesion, wet and elastic by Zhigang Suo

Submitted by Teng Li on

EML Webinar on 4 November 2020 will be given by  Zhigang Suo, Harvard University. Discussion leader: Jimmy Hsia, Nanyang Technological University

Title: Topological adhesion, wet and elastic

Time: 9:30 am Boston, 2 pm London, 3 pm Paris, 10:30 pm Beijing on 4 November 2020