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Material from xy data

Material from xy data

Material from xy data

(OP)
Hello...
First of all...sorry for my bad english!!

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

Thanks!!

RE: Material from xy data

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

thanks!!

RE: Material from xy data

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

RE: Material from xy data

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

RE: Material from xy data

(OP)
Help please!!

RE: Material from xy data

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

RE: Material from xy data

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.

RE: Material from xy data

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

RE: Material from xy data

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.

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