15 September 2022 0 7K Report

Dear everyone,

I read some code and found they code RHS in abaqus UEL not from volumem integration of B_T*Sigma or B_T S tensor (a typical form is attached in the file), while from sum(kuu(i,j)*u(j)). Can anybody explain why? In my mind, linearize residual force ru with displacement u to get kuu so the relation here should be derivation not multiplication.

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