Hello Everybody,
I have some problem, i use 3D unit cell model for the calculation of stress-strain curve of the soft plastic matrix with rigid inclusion. after calculation i take the reaction force, devived it into cross -section of ma specimen=this is my stress, and strain i obtain by deviding the displacement into he initial length of the specimen. nevwrtheless i think it is necessary to use some homogenization scheme to obtain the stress-strain response of the material. Could you please help me what should i do?
Best regards
ABAgirl
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unit cell model
Your description sounds like it is a version of the "Method of Macroscopic Degrees of Freedom" (Michel et al., Comput. Meth. Appl. Mech.Engng. (1999), 172:109). Provided the boundary conditions are O.K. this method should be fine. However, if you leave the small strain regime you will have to use appropriate stress/strain measures.
You can find some additional information in a report of mine available at
http://www.ilsb.tuwien.ac.at/links/downloads/ilsbrep206.pdf
helmut boehm
In reply to unit cell model by Helmut Boehm
Thank you very much
Dear Prof. Borhm,
Thank you very much for the valuable information.
I have been absent to this forum for the long time and have read you post only recently.
best regards
ABAgirl