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Post-doc for Mesoscopic Modeling of Autonomous Repair of Polymer Networks

Submitted by Erik Van der Giessen on
job
Self-Healing Polymers

Are you interested in contributing to the development of a totally new concept of self-healing in polymer networks? The Micromechanics group at the University of Groningen (the Netherlands) is offering a post-doc position for the development of coarse-grained Molecular Dynamics and/or novel mesoscopic models of polymer networks with dormant polymerization catalysts. The modeling work will be done concurrently with experimental research in the chemistry department of the university of Eindhoven.

Call for papers: Materiomics - materials science of biological protein materials (2009 Joint ASCE-ASME-SES Conf. Mech. Mat.)

Submitted by Markus J. Buehler on
conference
fracture
Conference
materials science
failure
proteins
deformation
cell mechanics
Symposium
disease

The 2009 Joint ASCE-ASME-SES Conference on Mechanics and Materials, June 24-27, 2009 · Blacksburg, VA

Materiomics - materials science of biological protein materials 

Mesh sensitivity in stress based failure criterion

Submitted by Gouse on
failure
softening

Hi,

 I want to simulate filaure in cement mortar. I am using Rankine criterion for detecting failure. For propagating damage i want to soften element. Here can I suddenly reduce the stiffness of the element to a negligible value as soon as it reaches specified failure criterion. I read in some book about mesh sensitivity in stress based failure criterion but i could not understand.Can some body expalin what is its consequence of suddenly reducing stiffness of element to a negligible value. How mesh will effect.

With Best Regards

Gouse

 

Initial Stresses by Subroutine SIGINI

Submitted by kashoo on

I am trying to simulate indentation process on stressed material. Problem is whenever I try to introduce initial stresses from SIGINI subroutine in axisymmetric model, to balance stresses, original stress field changes. When I do this in 3D model it works fine but for axisymmetric model as I cant introduce displacement control constraint at edge of axisymmetric, stresses relax towards the side of axisymmetric constraint.

Any idea or example of maintaining resdiual stresses in axisymmetric model thorugh SIGINI?

Terminology for discrete approaches to modelling fracture

Submitted by grassl on
research

It appears to me that there is more and more research done on discrete approaches to modelling fracture.

Especially for brittle or quasi-brittle materials these methods are undergoing a revival.

I am not sure why this is the case. I am also not in the position to judge if this revival is useful.

I just had recently a look at some of these models and I found these discrete models to be suitable

for description of fracture in heterogeneous materials, where cracks appear at many different positions.



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