Blog posts

SIMULIA is more social than ever before, and the lines of communication are wide open! Join in the fun, tell your friends, and chat with us whenever/wherever! As they say, "The phone rings both ways," the same sentiment applies for social media. We want to hear from you! What do you want to see? What do you like? What do you want more of? Tell us!



We look forward to hearing from you!



https://www.facebook.com/3DSSIMULIA

Earth science: Missing link in mantle dynamics

 http://www.nature.com/nature/journal/v507/n7490/full/nature13064.html

 Disclinations provide the missing mechanism for deforming olivine-rich rocks in the mantle

 http://www.nature.com/nature/journal/v507/n7490/full/nature13043.html

Abstract: 

Hello all,

I want to simulate loading of 2D RVE of dual phase steels, by giving individual phases properties, to get homogenised mechanical properties like yield strength,  % elongation etc, using micromechanics based approach. Litterature shows people have used two kinds of boundary condition viz. Periodic boundary condition and homogenous boundary condition for this case. My doubt is two folds:

1) What is the theoretical difference between these two kinds of boundary conditions? 

I am modelling a very simple 2D contact problem between a rigid indenter and a deformable squared-shape specimen. I used a implicit function f to describe the rigid indenter. 

The contact condition is: Inside the contact zone of the deformable specimen, a node n is outside of rigid indenter for f(n)>0, and inside for f(n)<0. In case f(n)=0, the contacting node lies on the surface of the rigid body.

The critical buckling load is given by Pcr=n² * (pi² * E*I)/L² where L is effective length.But what does the n refer to?Is it the number of buckling modes we want to see or some numbers depending upon the end fixity conditions?