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Abaqus VUMAT Plasticity Adiabatic temperature

Abaqus Explicit: difference in TEMP, STRESS and PEEQ computation between adiabatic and coupled


I have the two following INP files for Abaqus where the only difference is that in one case I'm using a CAX4R element on the other case, I'm using a CAX4RT element. Solver has been changed from one case to the other one.
This is the only difference between both cases.

Simulation time is small, so that conduction is negligible.

BUT: results in terms of Strains, Stresses and Temperatures differs.
T = 164.1°C for CX4R
T = 323.9°C for CAX4RT

The difference is Huge, what's Wrong ?



Dear All, 

We are working on Equal Channel Angular Pressing (ECAP) project and we are trying to implement CPFEM with Abaqus UMAT, there are few examples online but we could not able to run them on abaqus 6.13 with any subroutine. Does anyone have any working subroutines on related subject?

Kind Regards


Yunus Emre Kulhan

Adiabatic temperature in Abaqus VUMAT

Hi All ,
I found  simple VUMAT from Abaqus manual.It is based on
Von Mises plasticity and gives stress components, vonmises stress
and plastic equivalent strain.

I want to include the adaibatic temperature that rises/falls along the deformation in adiabatic
analysis.From a general book, i found that temperature-rise during deformation comprising

plastic strain1 to plastic strain 2 is given by:

Integral of stress between the strain limits,multiplied by a constant.

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