Mesh Stiffness Problem

mahdimazloom · October 11, 2014, 01:31

Capture.jpg

I have defined a rigid body having XY degrees of freedom for the inner cylinder in the figure. Mesh stiffness is adjusted as "increase near boundaries". But this is what happens after a few oscillations

. How can I solve this problem?

mahdimazloom · October 11, 2014, 01:40

I also tried 10[m^2/s]/orthfact^10 for the mesh stiffness so the stiffness would increase as the elements deform. But the result was the same.

ghorrocks · October 11, 2014, 04:40

Have you tried not specifying a mesh stiffness? The default settings will probably work for this simple case.

October 11, 2014, 01:31	Mesh Stiffness Problem	#1
mahdimazloom New Member Mahdi Mazloom Join Date: Jul 2014 Location: Mashhad - Iran Posts: 12 Rep Power: 11	Capture.jpg I have defined a rigid body having XY degrees of freedom for the inner cylinder in the figure. Mesh stiffness is adjusted as "increase near boundaries". But this is what happens after a few oscillations . How can I solve this problem?

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October 11, 2014, 01:40		#2
mahdimazloom New Member Mahdi Mazloom Join Date: Jul 2014 Location: Mashhad - Iran Posts: 12 Rep Power: 11	I also tried 10[m^2/s]/orthfact^10 for the mesh stiffness so the stiffness would increase as the elements deform. But the result was the same.

October 11, 2014, 04:40		#3
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,716 Rep Power: 143	Have you tried not specifying a mesh stiffness? The default settings will probably work for this simple case.