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true stress - true strain for elastic-plastic curve

5 REPLIES 5
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Message 1 of 6
roypersa
620 Views, 5 Replies

true stress - true strain for elastic-plastic curve

Hello again,

 

Could someone confirm whether (log) true stress -strain values are the right inputs for the Von Mises curve option?. This is the way to go in other solvers but just wanted to be sure as I have not found this detail in the documentation.

 

Thank you in advance,

 

Roger

5 REPLIES 5
Message 2 of 6
michwmichw
in reply to: roypersa

I was wondering the same thing.  Should I use Engineering or True Stress-Strain data?

 

Thanks,

Mike

Message 3 of 6
zhuangs
in reply to: roypersa

The true stress -strain values are the right inputs.

 

-Shoubing

Message 4 of 6
Anonymous
in reply to: zhuangs

Hi zhuangs,

I hope that this information is added to the online-help.

Regards;

Akihiro Matsuda

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Message 5 of 6
zhuangs
in reply to: Anonymous

Hi Akihiro,

I will let the documentation team know that.  Hope this can be added in V2016.

 

Thanks,

-Shoubing

Message 6 of 6
Anonymous
in reply to: roypersa

I selected a "Steel (AISI 1050) Annealed" in von Mises curve model (Fig.1). Same material properties of Matweb is shown in Fig.2.

 

I think that a nominal stress is used to express a tensile strength (Ultimate) in Matweb.

 

In Fig.1, Index 7 of Mechanical SS data table, Strain is 0.237 (mm/mm) and Stress is 636.386 MPa. On the other hand, Elongation at Break is 24%(=0.24), Tensile Strength (Ultimate) is 635 MPa in Fig.2.

 

Nominal stress and strain are used to SS data table? I have some misunderstanding?

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