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Panos Efthymiadis's blog

UMAT code for crystal plasticity

Submitted by Panos Efthymiadis on

Dear all,

           I would like to ask you something about prof.
Huang's subroutine. I want to verify the code, by using published
stress-strain data. But when I am plotting my stress -strain curve I am
always getting a straight line instead of a curve that shows the hardening effect. What could be a reason for this problem?

         Regards,

         Panos

p.s. I am using a single crystal, single element, and only modify the crystal orientation

Voronoi tesselation-grain size and orientation

Submitted by Panos Efthymiadis on

Dear all,

         I am trying to produce a metallic grain structure  using Voronoi. I am currently using Matlab. Does anyone know how I can control the area of the polygons-grains (impose a Gaussian distribution)? And another point is how can I assign the grain orientation for every polygon?

Regards,

           Panos