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Add a weak constraint to a governing equation for damage

Posted Mar 5, 2020, 7:19 p.m. EST Structural & Acoustics, Geomechanics, Structural Mechanics Version 5.4 0 Replies

Yu Zhang
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Dear All:

I have a governing equation , where d is the damage variable, A and B are constant variables, and H_p is the maximum value of positive strain energy (calculated by the positive principal strain). I want to add a constraint that, when the "positive " strain energy is less than the "negative" strain energy, H_n (calculated by the negative principal strain), then the damage will be zero, i.e. for domain . How should I add this constraint to the governing equation? How to select the Lagrange multiplier?

Thank you for your help and time.

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Yu Zhang
0 Replies Last Post Mar 5, 2020, 7:19 p.m. EST
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