Hello everyone, 

I am trying to build a thick composite mode in Abaqus. e.g., to model a thick GFRP laminate with 60 layers, I used partition in Abaqus to divide 60 layers. It is a coupled thermo-mechanical analysis.

My question is, can I use two types of elements in one model? for example, for the first 10 layers, C3D8T is used, while for the rest 50 layers, C3D20RT is used.How should I deal with the incompatibility between C3D8T region and C3D20RT region?

Besides, I want to export displacement derivatives of the surface plane, can I directly obtain displacement derivative components from Abaqus? I know I can directly get displacement in x, y, z directions in Abaqus, but not sure if it is possible to get displacement derivative information directly.

Thank you in advance!

Sincerely,

Nan