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Engineering groups have traditionally relied on linear, finite element analysis
Dielectric elastomer can undergo giant deformation, but are susceptive to various failure modes. i.e electrical breakdown.
Some experimental papers (Kofod, Plante, Chen, see the attachment) reported the dielectric strength of VHB material (a kind of dielectric elastomer) under difference pre-stretch, equal bi-axially or unequal bi-axially. And the strength (maximum voltage can be applied before breakdown) has be greatly improved by these mechanical stretches.
So here comes the question: is the dielectric strength dependent or independent of stretch？
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.
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.
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;
The first issue of the new interdisciplinary Nature journal (Nature Communications) is avilable online. Here is the description of the journal from the website of the journal:
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.
Hi, I am wondering whether there is any open source code for FEM for very simple cases. Thanks.
