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AntoineSfx

Do FEM solids bounce ?

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A simple setup with a sphere as FEM solid with its parameters set to rubber has a weird behavior. After touching the ground, the kinetic energy somehow dissipates but it doesn't translate in a deformation of the soild, so I'm wondering where the energy went. I'm assuming it's just not modeled by this tool, so it's not the right tool to do a bouncing ball effect. Is this what the hint on the shelf tool means by not very elastic ?

Edited by AntoineSfx

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Hey Antoine, try changing the  Integrator Type  to ABE2  in the Finite Element Solver

not sure if it works on all situations but once it worked perfectly for me 

image.png

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11 hours ago, ParticleSkull said:

Hey Antoine, try changing the  Integrator Type  to ABE2  in the Finite Element Solver

not sure if it works on all situations but once it worked perfectly for me 

image.png

ok I have this more or less working.. The kinetic  energy just seems to disappear too fast, and now the object sometimes explodes after a few frames.. I know that computational geometry is full of nasty edge cases , and that https://www.cs.cmu.edu/~quake/robust.html IEEE 754 is  not associative, hence .. problems sometimes.

Is there a way to systematically correct those problems when they appear ?

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