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I want to define node-based-surface in Python script to use it in *tie card. Please help. Thank you

Hi all,

please , can you help me getting links to download free material library ?

Is there some good data base for materials dedicated to FEA ? 

Thank you for any help.

Regards. 

Dear all,

hello dear,

i am new usre of abaqus, i try to model tunnel adjacent to reservior

my model:

- 2D model

- BCs: boundary of tunnel and reservior with rock assume be rigid (model with analytical rigid and tie to tunnel and reservior),

upstream of reservior have impedance and free surface of reservior have zero pressur.

steps: initial, dynamic implicit

- Load: earthquake acceleration apply to rigid boundary

Hello, 

I want to ask things about the updation of local material coordinate in large deformation. 

Does there exist two ways for this?

1. Polar decomposition of Gradient Deformation Tensor F to get the rotation tensor.

2. Update each basis vector of local material coordinate system using modified Gradient Deformation Tensor F_bar = F*J^(-1/3).

What I cared about is the second method, is the second method available?

Wish someone could help me, : ). Thanks!!