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1 PK, 2PK vs true, nominal stress
Tue, 2008-11-11 13:20 - Andreas Burger
Hi,
if I have a material model defined in cauchy stress then I use test data with true stress (calculated from nominal stress: sigma_true=sigma_nom(1+epsilon_nom).
If I wanted to use nominal stress data, which stress tensor would I have to use to define my material model? First or second Piola Kirchhoff?
Andreas
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