Hello,
I would like to know what should be the magnitude of displacement in abaqus in order to simulate experimental tensile test on mild steel and verify the stress/strain values?
I tried using the displacement magnitude as 1 but I am unable to reach the desired strain at the end increment.
My data line for boundary condition is,
*BOUNDARY,OP=MOD,TYPE=DISPLACEMENT
TOPP,2,2,1
Note: TOPP - Node set and its a non-linear problem with plasticity defined
Any sort of help will be appreciated.
Thanks!
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Hi Mohammed Faiz ,
I suggest the following.
Desired end engineering strain = E
Parallel length of specimen = L
Apply displacement = LE
Regards,
Simon
Simon Smith
Thanks for your suggestion.
But I made a few changes in the meantime.
I am applying the loading this way now,
*Amplitude, Name=Displ
0,0,0.5,0.0006
*Step,Inc=5000, NLGEOM
*STATIC
0.005,0.5,1D-9,0.005
*BOUNDARY,OP=MOD,TYPE=DISPLACEMENT,AMPLITUDE=DISPL
TOPP,2,2,1.0
(Note: My specimen length is 12 mm and I am targeting a strain rate of 0.0001 for which I have defined stress in material properties using '*Plastic' Keyword)
Am I doing it right?
Hi Mohammed Faiz ,
It seems that you are applying the following:
- At time 0, displacement = 0
- At time 0.5 displacement = 0.0006
- Hence strain rate = 0.0006/0.5 = 0.0012
- Final engineering strain = 0.0006/12 = 5E-5
The final engineering strain is very small, so you probably don't need NLGEOM. This is needed when values of predicted strain are large (e.g. >5%).
Regards,
Simon
Hello Simon Smith ,
Yes you are right I am applying it that way. I guess I made a mistake in the loading. I want the final strain to be around 35% to 50%. Then, I'll have to use NLGEOM I believe
Regards,
Mohammed
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