XANSYS Message: 20684 [Go back to message list]
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Subject: Re: snap-fit analysis
Author: Vijaykumar Ramalingam
Date: 2001-01-31 10:31:00Rick,
I have tried with changing KN values keeping KT as const. But still
penetration or non-convergence problem. I am using penalty approach and pcg.
Are they Ok with contact 48?
Thanks and regards
Vijay
-----Original Message-----
To: xansys
Sent: 1/29/01 4:40 PM
The problem is that we live in a flawed world.
Try this. Run the analysis with the low stiffness to get convergence,
then
increase the stiffness by increasing KN on the R card with RMODIF.
Then
perform a restart. Also, on the R card explicitly declare KT. If you
leave it
blank, Ansys will take KT=KN/100. If you change KN, it will try and
change KT,
which is illegal. Even if you do not use friction, declare a valuefor
KT.
Vijaykumar_Ramalingam on
01/29/2001
03:10:15 PM
To: "'xansys '"
cc: (bcc: Rick Fischer/MAIN/MC1)
Dear Gurus,
I am trying to simulate snap-fit of 2 parts. The contact part
stiffness is about 13 times lesser than that of target. I am
using plane 42 and contact 48. I could not get
convergence if I increase stiffness and over-penetration, if I
reduce the KN value.
I am apllying displacement to the part by keeping other part surface
constrained.
What could be the problem?
Thanks and reagrds
Vijay