contacts

mpvnaresh
mpvnaresh Altair Community Member
edited October 2020 in Community Q&A

Hello 

I am working on contacts .where i have 2 bodies between contact is defined (PCONT MU0.3).

inner edge of biody 1 fixed and a rforce applied in the model.

During post processing, I have following queries 

1. contact is happening only at a certain region (actually it should happen for the entair face .)

2.once the contact is formed and the body2 moved slightly ,then the contact should open but till the end the contacts once closed are remained closed. Why ?

3.contact force and contact pressure are high at the edge , Why ?

4.How to validate priperly if my contact is working properly (i can not depend on contact force and contact pressures as they are high at only the edge )

 

Plese find the attached pics

 

Please suggest me .

 

<?xml version="1.0" encoding="UTF-8"?>Capture.PNG

<?xml version="1.0" encoding="UTF-8"?>contact force.PNG

<?xml version="1.0" encoding="UTF-8"?>contact pressure.PNG

<?xml version="1.0" encoding="UTF-8"?>contact status.PNG

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Answers

  • mpvnaresh
    mpvnaresh Altair Community Member
    edited April 2019

    and also for certain rotations(high speeds) the body 2 slides to ditance of around 1 mm.

    and when i am unlosdind it witha a subcase the deformation is decreased by only 0.014 mm(Let us essume  due to the friction force body  1 is holding body 2 )

    but coming to stresses the stresses are even increasing during unloading steps Why is iot happening so. 

    <?xml version="1.0" encoding="UTF-8"?>deformation.PNG

  • mpvnaresh
    mpvnaresh Altair Community Member
    edited April 2019

    can we really apply unloading subcase for rforce is it a correct way ?

  • mpvnaresh
    mpvnaresh Altair Community Member
    edited April 2019

    can any one please helpme in this ?

  • mpvnaresh
    mpvnaresh Altair Community Member
    edited April 2019

    any suggestion is valuable for me .

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