I am unsuccessfully trying to introduce residual stresses in a hyperelastic anisotropic material characterized by the well-known HGO constitutive model via predefined fields. Any other idea?
Thank you in advance.
There are different ways to specify initial stresses in Abaqus. According to the Abaqus documentation 34.3.1 "Defining initial stresses" the stresses are defined by the keyword *INITIATL CONDITION, TYPE=STRESS. Here you have the following possibilities:
- To define the same stress for all elements
- To import the stresses from an ODB file
- To define stress for each element and integration point using the user subroutine SIGINI (only possible in Abaqus/Standard).
For the last possibility, a file with the initial stresses could be written, which will be read by the user subroutine and written to SIGMA(1..6).
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