Learning Forum

[Ayman]

 i  study model with non stress strain curve how could i define it in ansys material (multi linear isotropic hardening)

when calculate these values:

True Strain = ln(1+Strain)   where ln is the natural logarithm function.

True Stress = Stress(1+Strain)

Elastic Strain = True Stress/E

Plastic Strain = True Strain - Elastic Strain

where:

fy=309 mpa

fu= 580 mpa

E= 210 gpa

i get:

but the deformation decreases from 0.006 to 0.001 and still solve linear i donot know what is the problem

 

[peteroznewman]

but the deformation decreases from 0.006 to 0.001 and still solve linear

Please write a few paragraphs to explain, with images inserted, what you mean by that last part. I don't know what you are talking about.

[Ayman]

when i solved linear the total deformation (0.006) m 

when i start non linear by the above input the total deformation change to 0.001 

[Ayman]

and when i increase the load from 20000 N to 120000 N the output of deformation stil linear (0.001,0.002,0.003,0.004...)

[Ayman]

@peteroznewman can you still help me with this problem

[peteroznewman]

The results are showing two different Time steps.

If you plot the same Time, then the results will not be so different.

       

[Ayman]

Thanks @peteroznewman thats was very helpful