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Sai Phanindra

Incorrect Friction Computation

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I am using INTER/TYPE7 for contact definition of a piston sliding inside a cylinder. The contact parameters are:

Istf=4, Igap=1, FRIC=0.1, gapmin=0.01, INACTI=6, Ifric=0, Iform = 2. 


Please find attached the Resultant normal force and the Resultant Tangential force plot (created by TH/INTER output block). As it can be observed from the plot, the peak normal force is ~12 KN for which the expected tangential force should be 1.2 KN (for mu=0.1). However, the observed resultant tangential force peak is upto ~3 KN.


Please resolve this problem. Thanks a ton.



Sai Phanindra


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