Contact forces in Hyper View
Altair EmployeeI have done a simple nonlinear analysis
<?xml version="1.0" encoding="UTF-8"?>
Pressure is applied on the core cap
<?xml version="1.0" encoding="UTF-8"?>
and 6 bolt forces each one equal to 120 KN as shown below
and this bottom surface is constrained fully
Contact forec on the core cap piece, 4.58 E3 N
Contact force on the core piece 8.9E3 N
i appreciate if you can explain me what these contact forces really are in Hyperview.
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Altair EmployeeWould you please explain more. i don't understand why contact force on two pieces are different. they are action and reaction forces and they should be equal just in opposit direction of each other
Altair EmployeeHi Bita,
Contact force depends on contact stiffness and penetration. Contact stiffness is is dependent on material stiffness of two contacting bodies.
According to Newton's third law what you are saying is correct but the assumption there is the bodies are rigid.
Altair EmployeeWhat is Contact traction/ Normal (pressure)? someone told me you need to compare the value of contact traction / Normal (presure) in Hyperview. But I don't know what exactly this traction is?
Altair EmployeeHi Bita,
Pressure is the force per unit area on a node with area taken as surrounding elements. If the pressure value is positive it is compression otherwise it is tension.
Hello,
I am trying to compare the Average Normal Pressure/ total contact area and the resulting Normal Force from the .CNTF file. The figures I obtained are in different order of magnitude.
I have three questions in this regard:
the total contact area seems to be very low in the .CNTF file, how is it calculated? should I use the total available contact area instead?
Can I obtain the Average Normal Pressure directly in the software?
More importantly, previously in this discussion, it is mentioned that the contact force depends on the stiffness and the penetration, does it mean the normal pressure would also depend on the stiffness and the penetration? Would I get different answers depending of the K?
Hi @bita
I think contact stiffness depends on contact force and contact penetration.
Penetration needs to be removed by applying contact force. More contact force means more penetration.