Material Definition with different strain rates and temperatures

[gatre]

Hi friends.

I'm using Abaqus CAE 6.7EF to simulate deep drawing process. The material is Al-Mg alloy. I performed experiments with different strain rates such as 0.1, 0.01, 0.001, 0.0001/s at different temperatures: 20, 200, 250, 300 degree.
I read in documentation (17.1.2 Material data definition) but I can not understand how define this kind of material.
Please tell me, any suggestions is good for me.
Regards
Tung

 

[vumat721]

The easiest (though not best) way is to simply enter your data tabularly. For each of your rates and temperatures, you can input a table of <stress>,<plastic strain>,<temperature>. In CAE, you can enter all the data in one table and it will sort it out automatically. You will probably have to enter data for a rate of 0, which you could just duplicate your slowest rate data.

Example Input File:

*Material, name=Material-1
*Elastic
1., 0.3
*Plastic, rate=0.
0.5,0.,1.
0.4,0.,3.
*Plastic, rate=1.
1.,0.,1.
0.5,0.,3.
*Plastic, rate=10.
2.,0.,1.
1.5,0.,3.

 

[gatre]

Thanks VUMAT721