Boltpreload and displacement in contact
Boltpreload and displacement in contact
(OP)
Hello all,
Im working on a way to simulate a bolt contact with the sol101. For sol 601 I don’t have the license. In most cases its working for my problems well. But found a problem if I use friction to stop movement. I can see a small displacement in my connection. To check this I build this small model. Bolt preload is on a beam, which is connected by RB2 to the soild. The solids are connected by a linear connect:
Checked:
- node constraints on rot
- different rigids (rot)
- different boltfacts,
- and some more
Picture of the model:

Picture of the results (only bolt preload and with load):


my model if some want to try:
http://h2107735.stratoserver.net/protte/FEM/PB.mod...
may some have a clue how to fix it and make a stable connection.
Im working on a way to simulate a bolt contact with the sol101. For sol 601 I don’t have the license. In most cases its working for my problems well. But found a problem if I use friction to stop movement. I can see a small displacement in my connection. To check this I build this small model. Bolt preload is on a beam, which is connected by RB2 to the soild. The solids are connected by a linear connect:
Checked:
- node constraints on rot
- different rigids (rot)
- different boltfacts,
- and some more
Picture of the model:

Picture of the results (only bolt preload and with load):


my model if some want to try:
http://h2107735.stratoserver.net/protte/FEM/PB.mod...
may some have a clue how to fix it and make a stable connection.





RE: Boltpreload and displacement in contact
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RE: Boltpreload and displacement in contact
CODE
Node 10419 Output Set 8 : BP ONLY 10kn Value = 0.036456 | Output Vector 1 : Total Translation Value = 0.011525 | Output Vector 2 : T1 Translation Value = 0.02153 | Output Vector 3 : T2 Translation Value = 0.027068 | Output Vector 4 : T3 Translation Output Set 9 : BP ONLY 20KN Value = 0.075214 | Output Vector 1 : Total Translation Value = 0.02305 | Output Vector 2 : T1 Translation Value = 0.04319 | Output Vector 3 : T2 Translation Value = 0.0571 | Output Vector 4 : T3 Translationwe see total deformation is 3*T1. T1 is the axial vector of my bolt. But if i set a friction in my connection. there should be no traction in my connection.
RE: Boltpreload and displacement in contact
The link to donwload the FEMAP model is not valid, something is wrong, please check.
Best regards,
Blas.
~~~~~~~~~~~~~~~~~~~~~~
Blas Molero Hidalgo
Ingeniero Industrial
Director
IBERISA
48004 BILBAO (SPAIN)
WEB: http://www.iberisa.com
Blog de FEMAP & NX Nastran: http://iberisa.wordpress.com/