XANSYS Message: 20606 [Go back to message list]
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Subject: Re: snap-fit analysis
Author: Mark Tate
Date: 2001-01-29 18:24:00R card? Geez, you must have listened to the Beatles .... :)
Mark C. Tate
Principal Analysis Engineer
Hamilton Sundstrand - A United Technologies Company
mark.tate@h...
-----Original Message-----
Sent: Monday, January 29, 2001 1:40 PM
To: xansys
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