Material from xy data 1

[DonSalieri]

Hello...
First of all...sorry for my bad english!!

It's possibile to create a new material from ?-? data?

Thanks!!

 

[DonSalieri]

It's possibile to create a new material from stress-deformation data?

thanks!!

 

[Yoman228]

You mean stress vs strain data?
if that the case. then yes.
but ensure that abaqus use engineering stress and log strain

 

[DonSalieri]

Thanks!
And how I can insert and use the data?

 

[DonSalieri]

Help please!!

 

[SWComposites]

Have you read the manual? There's probably an appropriate example problem.

 

[EricCabrol]

I'm not sure I understand your question properly, but here's an example assuming metal plasticity :

*MATERIAL
*PLASTIC
stress_1,strain_1
stress_2,strain_2
...

where the pairs (stress_i,strain_i) define the material's curve.

 

[bassmanjax]

Also, don't forget that the strain needs to be true plastic strain; i.e. the strain at the yield stress is zero.

Stress is true stress, not nominal stress. This is covered fairly well in the docs.

To expand on EricCabrol's post;

*material, name=...
..
*plastic
200,0
210,0.01
220,0.02
230,0.05
...

Where 200 MPa is the yield stress. The data pairs then describe the material curve post-yield.

Regards

Martin Stokes CEng MIMechE

 

[Yoman228]

opp... you are right bassmanjax, How did I make that typo mistake (must have been too tried)...... Sorry for the misleading...

If it is material steel. If you do not have Stress Vs strain curve, using Ramberg–Osgood material behaviour is a good starting point with yield stress and tensile strength.