Hello!,
You are mixing many things: this type of problems are nonlinear, then the setup is more complex than simply linear static solution (SOL101) using surface-to-surface contact, you need to use Advanced Nonlinear Static solver (SOL601) in order to account for plasticity, large displacements & contact nonlinearities. Here you are an example of crushing an hyperelastic material between two rigid plates (
In NX AdvSim you need to perform two critical steps:
•
Enforced Displacement constraint: in the Simulation Navigator, right-click Constraint Container→New Constraint→Enforced Displacement Constraint. You can select a face of the rigid tool, or better create a "spider-like" rigid RBE2 element and prescribe the enforced displacement contraint directly to the INDEPENDENT (master) node of the RBE2 element.
• The target contact region options: under the NX NASTRAN options of Nonlinear Contact Parameters (BCRPARA) you can set the target rigion as flexible o rigid.
For advanced nonlinear solutions (SOL 601 and 701), this parameter indicates whether a 3D contact region is a rigid surface.
• Select Flex to indicate that the region is not rigid.
• Select Rigid to indicate that the region is rigid.
For more information, see BCRPARA in the NX Nastran Quick Reference Guide and Contact conditions in the NX Nastran Advanced Nonlinear Solution—Theory and Modeling Guide.
If you select Rigid from the Type list, you will need to select the node (master grid point) that controls the motion of the rigid surface. Rigid surfaces have no flexibility apart from their rigid body motions. Internally, the software uses rigid links to connect all the nodes on the rigid target region to this master node.
Best regards,
Blas.
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Blas Molero Hidalgo
Ingeniero Industrial
Director
IBERISA
48011 BILBAO (SPAIN)
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