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Sudden Change of the Force -Displacement Curve

Chen_21280

I've made a model of 3 point bending test. But there is always a sudden change of the curve. I want fix these sudden changes.

I've made the zentral nodes BSC, in Vx, Wz,/Vy.Wz.

Thank very much for the help!

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Radioss

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Chen_21280

Anyone else can help me?

Simon Križnik

Hi,

the nonlinear force-displacement graph is consistent with geometric (buckling) or material (plasticity) non-linearity. Can you share the model or the engine out file?

WARNING ID : 343 (INITIAL PENETRATIONS IN INTERFACE) should be removed. In HyperMesh, go to Tools>Penetration and check the model for any penetrations. You can manually or automatically fix them. Please refer HM-3320 tutorial in Help Menu which shows the steps.