# TungPhan's blog

## Abaqus 6.9

Hi all,

Please could  anyone help me for this?

How to link Abaqus CAE with UMAT subroutine? When I run simulation, it announced that

"Error in job tensile: Problem during linking - Abaqus/Standard User Subroutines.   This error may be due to a mismatch in the Abaqus user subroutine arguments.   These arguments sometimes change from release to release, so user subroutines   used with a previous release of Abaqus may need to be adjusted.
Job tensile aborted due to errors."

## Lemaitre damage material model

The Lemaitre damage material model was developed by Lemaitre for an isotropic linear elastic virgin material with stress-strain law as follows

\label{eq:22}
where $D$ represents the extent of damage with the damage evolution law