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What causes the other: Stress cause strain or Strain cause stress ( Conjugated Polymers)

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conjugated polymer
stress-strain
ionic electroactive polymers

 I am struggling in understanding a theorem related to a conjugated polymer which is based on the electro-chemo-mechanical working principle.

The basic idea of the actuator is constructed from three layers, the up and bottom are conductive and the medium layer is dielectric and when the voltage applied the ions migrates to fill the holes.

It is mentioned that the expansion is happening because of the migration of the ions and then the stress occurs.

I don't agree with it as what makes the ions migrate is the electrostatic force and then the strain occurs.

CISM course "The Art of Modeling in Computational Solid Mechanics"

Submitted by Alexander Schwarz on
education

Dear colleagues,

We are pleased to inform you about the CISM course

"The Art of Modeling in Computational Solid Mechanics"

coordinated by Jörg Schröder and Peter Wriggers
which takes place in Udine from Oct 7, 2019 - Oct 11, 2019.

This course accounts for all doctoral and postdoctoral researchers in
civil and mechanical engineering, applied mathematics and physics as well
as industrial researchers, which are interested in conducting research in
the topics of advanced constitutive modeling, homogenization, data driven

How do I do multiple restarts is ABAQUS ?

Submitted by rajan_prithivi on
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#ABAQUS #FEM #Restart

Hello All,

I have been trying to restart an ABAQUS simulation using the command line. The following works fine

########

abaqus job=restart1.inp oldjob=OLD user=UMAT.f cpus=160 scratch=$PWD interactive

########

But when I do the restart for the second time like the following, It gives me an error

########

abaqus job=restart2.inp oldjob=restart1 user=UMAT.f cpus=160 scratch=$PWD interactive

########

Error :

****************************

Real life example of Eigen values and Eigen vectors

Submitted by rajan_prithivi on
education
eigenvalues
eigenvectors

Eigen values / vectors finds applications in most engineering disciplines and also in basic sciences. In this video, I tried to explain the  meaning of Eigen values/vectors in a simple way and gave a real life example of the same. Here is the LINK to the video.

PhD position in Theoretical & Experimental Mechanics of High Performance (bio)Materials

Submitted by Dargazany on
education

 

Our Group of High Performance Materials in Enviormental & Civil Engineering Department at Michigan State University has two openings for PhD positions to work on Multiscale Modeling or Experimental Charachterization of Soft Materials starting Fall 2019.

 

One week intensive DIC course, 1-5 July, Ghent, Belgium

Submitted by Fabrice Pierron on
education
digital image correlation;training;course

The 7th edition of the International Digital Image Correlation (DIC) course will be held in Ghent, Belgium, 1-5 July 2019. There are still a few seats available (total participation limited to 20 to ensure maximum interaction). The course consists of lectures, hands-on data processing sessions and labs (camera set-up, 2D DIC and Stereo-DIC). Details and registration available here.

how to access the main page of abaqus-docs.mit.edu

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Abaqus cae

I found a great tutorial for abaqus/cae at https://abaqus-docs.mit.edu/2017/English/SIMACAEGSARefMap/simagsa-m-Caeb... but I cannot find the main page, which I need to navigate it; I am forced to Google for individual sections guessing at what the section titles migh be; I need a URL to the root page so I can navigate the tutorial like an ebook. 

 

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