Concrete as Non-Linear Material in Mecway

Aftab · February 9

Hi there, i am trying to run a simulation on a tubular joint where there is grout (plain concrete) filled in. I am using CCx custom material definition. Can some help whether below is correct material card for a concrete with 70MPa strength.
I also want to apply a small tension cutoff point, is this the right way to define it?

*Elastic
4e10, 0.2
*Plastic
0, 0
0.0005, 20e6
0.001, 40e6
0.0018, 60e6
0.0025, 70e6
0.0035, 65e6
0.005, 50e6
*tension cutoff
5000000

Victor · February 9

I'm not sure if CCX can handle a decrease in the stress-strain curve.

It doesn't have the *TENSION CUTOFF keyword, and the *PLASTIC stress-strain data has to be non-negative (stress is von Mises), so you can't define it there.

It does, however, have a compression-only material with otherwise linear elasticity, which you can define like:

*USER MATERIAL, CONSTANTS=2
30e9, 3e6

and must give it a name beginning with COMPRESSION_ONLY

Aftab · February 10

Thanks, Victor, for the heads up, I have replaced all my elastic, plastic, and tension cut off with user defined compression only properties for concrete, i have tried it to run, i get below warning, is it normal?

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Concrete as Non-Linear Material in Mecway

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