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HyperElastic material does not follow Prescribed Displacement BC

Francesc-Xavier Borras

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Hello,

I am modeling a Lip Seal and I wanted to compare the Dispalcement Field when using a Linear Elastic material or when setting a HyperElastic one. The model is 2D axysimmetric (see picture attached).

Since the seal is confined in a defined space, I am using the Prescribed Displacement BC to account for the shaft and the seal housing . Two Prescribed Displacement BCs on Z (top and bottom) and two Prescibed Displacement BCs on R (left and rigt).

Funnily when I use a Linear Elastic material, the Prescribed Displacement BC is perfectly followed (snap on the left side). However, when I switch it to HyperElastic (snap on the right side) the Prescribed Displacement are not really accounted.

Any idea? I am finding asolution for the HyperElastic way too early? I was checking the Relaxation and Solver parameters but I did not manage to get any improvement...

Thanks in advance,


0 Replies Last Post Apr 28, 2016, 6:38 a.m. EDT
COMSOL Moderator

Hello Francesc-Xavier Borras

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