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I am doing explicit dynamic analysis in OptiStruct and there is material non-linearity. Which card should I use to define material non-linearity: MATS1 or MATX02?
Thank You.
It depends if you are using 'native Optistruct Explicit' (NLEXPL subcase) or 'Radioss Integration Explicit' (EXPDYN subcase), MATS1 is used by the former, MATX02 by the latter
Paul Sharp, how do I specify the failure point (i.e. ultimate tensile strength and the corresponding failure strain) using MATS1 card.
you can't really, save for setting the stress/strain curve close to flat at this point, native OS Explicit has no element erosion as yet so you can't 'fail' elements as such
Paul Sharp,
Suppose I specified the stress-strain curve upto "X" strain, then what will happen if the strain in the model is more than "X"?
Will the solver do extrapolation?
Paul Sharp, Suppose I specified the stress-strain curve upto "X" strain, then what will happen if the strain in the model is more than "X"? Will the solver do extrapolation?
I think so, but to be honest I have not tried!
From the help:
'If the deformations go past the values defined in the table, the curve is extrapolated linearly'
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