Kinematic hardening model

[yaston4]

Hi all,

I am not sure why there is a problem with my material model, I seem to be getting an error: "Only one hardening slope is allowed for kinematic hardening".

*Material, name=Co1
*Elastic
230000., 0.3
*Plastic, hardening=KINEMATIC
500., 0.
517., 0.0015

The units are MPa.

I would really appreciate some help, thanks.

 

[JK7070]

Maybe you could try and run it as an isotropic model just to check if that works. Maybe there is an issue elsewhere in the model? Just be careful if you are running a cyclic analysis as isotropic hardening would not be appropriate. But it should prove as a check on the model.

Regards
JK7070

 

[yaston4]

Hi, I started off with an isotropic model with the following

*Material, name=Mat1
*Elastic
231000., 0.3
*Plastic
500., 0.
517., 0.0012
560., 0.02
600., 0.06
650., 0.1
640., 0.1021

This ran well and completed. I just do not understand why the kinematic hardening model gives the error message, "Only one hardening slope is allowed for kinematic hardening"? I would really appreciate some further help.

Thanks.

 

[mrgoldthorpe]

Check that you haven't got a blank line following the line
517., 0.0015