sixuan chen
Mechanical
- Jun 3, 2017
- 1
Hi everyone,
I'm a master student learning Abaqus VUMAT coding and I'm writing VUMAT for material with J2 plasticity and rate-dependent johnson-cook hardening as my final project.
Currently, if I exclude the rate-dependent term in johnson-cook hardening then everything works perfectly in single and multi element test, but if I add the plastic strain rate term in the hardening law, then the Newton-Raphson iteration searching the plastic corrector (dPSRM and PSRM) can't converge.
Could anyone take a look at my fortran file and see what may go wrong?
Thank you for your valuable time!
Sixuan Chen
I'm a master student learning Abaqus VUMAT coding and I'm writing VUMAT for material with J2 plasticity and rate-dependent johnson-cook hardening as my final project.
Currently, if I exclude the rate-dependent term in johnson-cook hardening then everything works perfectly in single and multi element test, but if I add the plastic strain rate term in the hardening law, then the Newton-Raphson iteration searching the plastic corrector (dPSRM and PSRM) can't converge.
Could anyone take a look at my fortran file and see what may go wrong?
Thank you for your valuable time!
Sixuan Chen