Hello
I want to use ductile damage model in abaqus to simulate the deep drawing of square part. To reach this goal i need to enter values of stress triaxiality and fracture strain during the deep drwing process. I know stress triaxiality = -P/Q wich (P=-1/3(S1+S2+S3)) and Q= von mises equivalent stress. But i don't know how to get the values of the principale stresses and fracture strain experimentally
I get also the values of (S1,S2,S3,von mises) from ODB field output and calculated the stress triaxiality but i don't know if the results are good or not.
Could you help me please?
Hi!
To do this, experiments are carried out on stretching samples with a circular recess of various radii. Then, the parameters of the stress-strain state are estimated using approximate formulas or using numerical analysis.
Dear Mr. Salah Laboubi
It is suggested to read following papers for more information in this regard:
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Hi,
You can mount a strain gauge on your part. Each set of measurements give you three values. Then the rest of the stress tensor components can be found using the equilibrium equations. When you have all the stress components, you would be able to calculate principal stresses.
Good luck
Farzad
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