DDSDDE jacobian size in UMAT?

Hi, can our DDSDDE matrix in Abaqus be of size 9*9 instead of 6*6? Basically it is a fourth-order tensor and it has 81 elements in it but we reduce it to 36 but will Abaqus accepts it if it is 9*9.

28 November 2019 5,069 3 View