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Max principal logarithmic strain equals negative min principal strain?

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bebme

bebme

Bioengineer
Apr 11, 2008
19
I am compressing a hyperelastic material in a 2D plane strain quasi-static model. When I view my strain results, my maximum principal logarithmic strain equals the negative of my minimum principal logarithmic strain. Not sure why this occurred since Poisson's ratio is assumed .5 not 1. Any suggestions??



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