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Hello everyone!

Tow Cross Sectional Area of fiber

Dear all,



I have a problem now:



I simulated indentation on a elastic-plastic model with a rigid
indenter, the elastic ideal plastic with von mises stress model in



ABAQUS is used. A contact pair is applied to calculate the contact between the indenter and the sample.



The problem is that the obtained the force-displacement data in the loading part, which contains the plastic deformation

is not smooth, but in the unloading part is smooth. But if a model

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.