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Correct Average of Stress/Strain Microfields

Submitted by adz on
This is a general micromechanic question.

Suppose we have a microstructured 2-phases material with random inclusions (or a porous material with random pores) and we make a real tensile test (monoaxial loading in the vertical direction of a specimen with nominal length L). We want to model such tensile test with FEM (for instance with Abaqus) like in this pic:
 
 
 
 

Solving nonlinear equilibrium problem

Submitted by Bashir Venkatta on
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Hi!

I am trying to solve (for equilibrium points) a geometrically nonlinear problem of the form

f(u) = F

where u is the displacement and F is the load. At first I tried the plain

Newton method, with, perhaps obviously, limited success. I then tried to use

linesearch and trustregion strategies to improve the situation. Eventually, however,

I realized that I needed to use some form of continuation method. Though the most

commonly used methods in mechanics seems to be based on gradually increasing the

PhD scholarship in Micro Mechanical Damage Tolerance Improvements of Composites

Submitted by Alan Wervick on

A PhD scholarship is available at DTU Mechanical Engineering, Technical University of Denmark in the field of micro mechanical modelling of composite materials for wind turbine blades. The department has well-established research activities within material modelling and composite mechanics.

Two openings for Ph.D. student positions in Computational Mechanics/Materials Physics

Submitted by nikhil.medhekar on

At the department of Materials Science at Monash University, we have two openings for Ph.D student positions starting immediately in the general area of Computational Mechanics/Materials Physics. The material systems that we are interested in—for example, graphene, semiconductor nanowires and quantum dots—are relevant for nanotechnology and energy applications. The current research topics are multidisciplinary in nature, with underlying principles drawn from Mechanics and Condensed Matter Physics.

J. Mechanical Behavior Biomedical Materials - first impact factor of 3.176!

Submitted by Louise Morris on

I'm pleased to announce that the Journal of the Mechanical Behavior of Biomedical Materials (JMBBM) has received its first impact factor. For 2009 the impact factor is 3.176*, ranking JMMBM 4th in category Materials Science, Biomaterials and 8th in Engineering, Biomedical.

Congratulations to the editorial team - a great result reflecting all their contributions since the Journal's inception in 2007 - and sincere thanks to the authors and reviewers who supported the Journal in its first three years!