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Journal Club Theme of March 2015: Mechanics of 2D Solid and Fluid Crystals

Submitted by Sulin Zhang on Sun, 03/01/2015 - 16:49

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Sulin Zhang, Pennsylvania State University

Hongyan Yuan, University of Rhode Island

A single theory for some quasi-static, supersonic, atomic, and tectonic scale applications of dislocations

Submitted by Xiaohan Zhang on Sun, 03/01/2015 - 02:02

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field dislocation mechanics

Peierls stress

supersonic dislocation

dynamic rupture

Xiaohan Zhang Amit Acharya Noel J. Walkington Jacobo Bielak

We describe a model based in continuum mechanics that reduces the study of a significant class of problems of discrete dislocation dynamics to questions of the modern theory of continuum plasticity. As applications, we explore the questions of the existence of a Peierls stress in a continuum theory, dislocation annihilation, dislocation dissociation, finite-speed-of-propagation effects of elastic waves vis-a-vis dynamic dislocation fields, supersonic dislocation motion, and short-slip duration in rupture dynamics.

Nanodurotaxis: a fundamental law of nanoscale directional motion

Submitted by Tienchong Chang on Thu, 02/26/2015 - 02:17

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nanomechanics

Hi all,

One of our recent works on nanoscale directional motion induced by stiffness gradient.

I hope you will find it interesting.

http://dx.doi.org/10.1103/PhysRevLett.114.015504

This work has been presented in 2014 MRS Spring Meeting by Prof. Huajian Gao (the PPT file he used is attached): https://mrsspring14.zerista.com/event/member/109225

Best,

Tienchong

Creating a path in python for Abaqus

Submitted by setareh on Wed, 02/25/2015 - 18:15

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ABAQUS

Dear all,

I want to write a python script for ABAQUS in which I can define a path for post-processing purposes. Getting the nodes which lie on the path is easy because they all lie on one edge, so with

myNodes=myEdge.getNodes()

I get the list of nodes.

Now the problem:

Mechanical responses and deformation mechanisms of an AZ31 Mg alloy- Part 2

Submitted by Amit Pandey on Sun, 02/22/2015 - 15:57

Recent paper is Part-2 of the paper mentioned below

http://imechanica.org/node/10104 

http://www.sciencedirect.com/science/article/pii/S0749641910001142 

Mechanical responses and deformation mechanisms of an AZ31 Mg alloy sheet under dynamic and simple shear deformations

J integral and Q parameter

Submitted by MohammadSahlabadi on Thu, 02/19/2015 - 22:09

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Does anyone know how I can calculate J integral from descrete displacement field, stress and strain data which I estimated from experiment?

Additive manufacturing --> microstructure-->mechanical response

Submitted by Amit Pandey on Tue, 02/17/2015 - 02:50

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Tensile behavior of selective laser melted Ferritic Oxide Dispersion Strengthened Steel was evaluated for the first time and correlated to microstructures.

http://www.sciencedirect.com/science/article/pii/S1359645414009732

how to apply cyclic loads in direct cyclic low cycle fatigue

Submitted by oberoitan on Sat, 02/14/2015 - 14:45

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Fracture Mechanics Forum

Choose a channel featured in the header of iMechanica

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hiii My dear CAE simulators....

plz help me m doing fatigue life estimation of plate with hole problem under constant amplitude tensile-compression

Update: Journal Club Entry July 2014: Overcoming Challenges in Liquid Crystalline Elastomers

Submitted by Chris Yakacki on Fri, 02/13/2015 - 23:04

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Liquid Crystalline Elastomers

Active Polymers

Shape Memory Polymers

Dear iMechanica,

Last July I posted a journal club entry on overcoming the traditional challenges in mechanically actuating liquid-crystalline elastomers (http://imechanica.org/node/16853). I'm glad to say we finally got our first manuscript regarding this work published in RSC Advances (DOI: 10.1039/C5RA01039J).