In one of my project, I need deformation gradient or displacement gradient for some elements in my model that made by ABAQUS software and I can't find it directly, any suggestion or help would be appreciated.
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1$\begingroup$ Are you writing a user element or user material subroutine? $\endgroup$– Matt POct 31, 2017 at 16:23
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From a theoretical standpoint, the displacement gradient is equivalent to strain (assuming a structural problem).
Numerically, you can obtain the derivate of a quantity through multiplication with the derivative of the shape functions, which is often referred to as the B matrix:
du = B u
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$\begingroup$ +1. As one of this site's top users in the Abaqus tag, I wonder if you've seen this question and/or if you might know the answer to it? mattermodeling.stackexchange.com/q/2055/5 $\endgroup$ Nov 14, 2020 at 3:36