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Coconuts, Blood Cells, Snail Armor - What do they have in common?

Submitted by Twebb83 on

As the 2010 SIMULIA Customer Conference approaches, it reminds me of a thought-provoking presentation given by Dale Berry of SIMULIA at the 2009 SCC in London.

He reminded the audience, of engineers and researchers, that Realistic Simulation is not only good for evaluating mechanical behavior of product performance, but it’s also an indespenible tool for driving innovative research that improves our lives and society.

Mixed-Mode Fracture. Curved Crack Path

Submitted by Zhigang Suo on

These notes belong to a course on fracture mechanics

A crack pre-exists in a body. When the body is loaded, the two faces of the crack may simultaneously open and slide relative to each other. The crack is said to be under a mixed-mode condition. When the load reaches a critical level, the crack starts to grow, and usually kinks into a new direction. Subsequently the crack often grows along a curved path.

Theory of Piezoelectricity

Submitted by Anonymous (not verified) on

Hi there;

Do anyone know? I mean, is there any graduate course in the title of "Theory of Piezoelectricity" or "Theory of Electroelasticity" -or thing like that, related to the concepts of electro-mechanical coupling behaviour of smart materials- at any university? If so, would you please tell me the name of that institute?

I appreciate any assistance.

Thank you;

How to solve global stiffness problem using FEA in Ansys?

Submitted by phamduyhai0201 on

 
 HI EVERY BODY!
 
      I'm studying about composite pressure vessel type 3 (that 's with liner inside) . I use Ansys to simulate my object, but i have a problem, i can't solve stress and strain for Solid64 (global stiffness). I don't know how can combine Matlab with Ansys to solve that problem.
 
      I hope some one have some experience in this field can help me. May be show me some simple example how to solve that problem.  

Incompressibility and Bulk Stress for Viscoelasticity

Submitted by shrimad on

Hi all,

 

I am performing compression on a viscoelastic material with relaxation only in shear and the bulk being nearly incompressible.

The relaxation times for shear are of the order of millisecons so shear stress is dissipated almost immediately at the end. But there are high stresses due to bulk part.

Help with curved specimen and mechanical loading

Submitted by tom_biomech on
Background:

Rib fractures in infants are highly suggestive of child abuse. I am performing mechanical testing and finite element analysis on pig ribs with the aim of characterising the behaviour of ribs under anterior-posterior (from end to end rather from the side) loading.



Help needed:


Large electric field induced strains in ferroelectric islands

Submitted by jzz108 on

An effective mechanism that generates large recoverable electric field induced strains in ferroelectric islands is studied by phase-field modeling. The large strains originate from the reversible 90° domain switching between a1 (a2) domains and c domains, driven by an applied electric field and an internal stress field. The electric field induced strains could be effectively controlled by the magnitude of island-substrate misfit and the aspect ratio of islands.

The paper could be download in the following link: