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# Stress-strain curve using FEM software

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Posts: 4
Topic starter
(@dima)
New Member
Joined: 14 years ago

Good afternoon,

How I observed on some articles which develop subject of stress-strain curve, appear some FEM results and with FEM results is compare analytical calculus and experimental calculus.

My question is how can be construct curve stress-strain for material using material data like :modulus of elasticity, Poisson coef., density of material.

Can be combined FEM power with analytical calculus in a manner in which values obtain from FEM is entered in analytical calculus and the results from analytical calculus is entered in FEM, in an iterative manner ?

Thank you for understanding and best regards.

P.S. Im ANSYS user.

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Posts: 3998
(@jorgen)
Member
Joined: 4 years ago

I am afraid that I dont understand your question.
Can you explain more?

-Jorgen

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4 Replies
Posts: 4
Topic starter
(@dima)
New Member
Joined: 14 years ago

Hi Jorgen,

What Im curios is about if I can used FEM to construct stress strain curve begin from considerate that material have properties : modulus of elasticity, density, and Poisson coef. The probe which is used in FEM study must be the same like the standard probe.

First of all If I applied a Force=1N, second step F=10N, and so on.

This steps combined in some manner with analytical calculus have finally objective the engineering stress strain curve. This manner I want to adopted to find Mooney-Rivlin coef. Unfortunately I cant find yet how I can determinate coef. C01, C10 and D for this type of material. More than that this coef. are denominated material factor. I find a relation on some specialized articles which say that E/6=C01+C10.

I hope you can help me to find only one of this coef.

Thank you for understanding and support.

Best regards

Posts: 3998
(@jorgen)
Member
Joined: 4 years ago

If you know the Youngs modulus, then why do you want to find the Mooney-Rivin parameters? Can you not simply use the linear elastic model?

-Jorgen

Posts: 4
Topic starter
(@dima)
New Member
Joined: 14 years ago

Good afternoon Mr. Jorgen,

My purposes is to find parameter C01, C10 and D1 because I using ANSYS software, and when I setup the material type like Mooney Rivlin with two parameters I need this values.

Maybe you can help me. If I have already stress-strain curve establish with modulus of elasticity constant, I can determinate this values (c01,c10,d) ? Maybe I dont understand very well some things. I hope you can offer me an support to understand better this things.

Thank you for understanding and best regards.

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