Thank you for your presentation. Minute 9.15, you use dep_ij = dlambda (n.dsigma).n_ii. My question is, if your plastic strain increments had ij as free indices, why did you multiply by n_ii? Are you showing that for hydrostatic-stress insenstive materials, the plastic flow rule indicates that there is no change in volume only in the trace, right? Because when i is different than j, we should have a plastic volumetric strain different than 0. Thank you for your time.
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Thank you for your presentation. Minute 9.15, you use dep_ij = dlambda (n.dsigma).n_ii. My question is, if your plastic strain increments had ij as free indices, why did you multiply by n_ii? Are you showing that for hydrostatic-stress insenstive materials, the plastic flow rule indicates that there is no change in volume only in the trace, right? Because when i is different than j, we should have a plastic volumetric strain different than 0.
Thank you for your time.
Thanks. I should have written deps_ii.
@@mbarkey.mechanics Thanks to you for such comprehensible lectures. Have a great day ahead.