Learning Forum

[LeaB]

Dear all,

for my master thesis I simulate a Timber-Concrete-Composite Beam. Therefore, I should consider cracks in the tension zone of the concrete slab. First idea was to use a concrete Drucker-Prager softening material model (see picture 1).

I used a patch-test to verify the material model. Unfortunatly, the stress-strain curves under compression and tension are not as I imagined (see picture 2). I attached self-drawn stress-strain curves to show you how they should look like (see picture 3).

Furthermore, there are Solver-Pivot Warnings during the patch-tests, howerver, the calculation works. But for a simply supported beam the calculation doesn't converge. (I have already defined substeps.)

Can someone help me please? Did I define the Drucker-Prager softening wrong?

Thanks in advance!

Lea

[Ashish Khemka]

nnThe solver pivot warnings might indicate an unconstrained model. Can you check if the model is constrained properly?.Regards,nAshish Khemkan

[LeaB]

nnThanks for your answer. nAnsys is still pretty new to me, so where do I check that? nnRegards,nLean