How to stop penetration of Body in another body in motion view

Tejas
Tejas Altair Community Member
edited June 4 in Community Q&A

Hello I am currently simulating one model in motion view in which the plunger is moving and give motion to another body which comes in contact to of plunger. But the plunger is get penetrated in another body without moving it. I have given velocity to plunger as motion and translation joint wrt ground. also  I have added contact between this two part (plunger and body).

What is the reason the plunger is getting penetrated?

what should I changed in simulation so that proper simulation happen without penetration?

Thank YOU

Tagged:

Answers

  • Praful
    Praful
    Altair Employee
    edited May 24

    Hi Tejas - Since I cannot see the model, I am guessing here.

    Motion is a constraint and the solver will enforce the constraint. Hence the body will penetrate even when there is some other resisting force like contact.

    You may have to remove the motion and use a different way of modeling the movement of the plunger.

    Regards

    Praful

  • Tejas
    Tejas Altair Community Member
    edited May 26
    Praful Prabhu_20784 said:

    Hi Tejas - Since I cannot see the model, I am guessing here.

    Motion is a constraint and the solver will enforce the constraint. Hence the body will penetrate even when there is some other resisting force like contact.

    You may have to remove the motion and use a different way of modeling the movement of the plunger.

    Regards

    Praful

    Thank you for your Response.

    You know any other method through which I can give motion to the plunger  without applying  motion command in motion view?

  • Christopher_Fadanelli
    Christopher_Fadanelli
    Altair Employee
    edited May 28
    Tejas Milind Gangawane said:

    Thank you for your Response.

    You know any other method through which I can give motion to the plunger  without applying  motion command in motion view?

    Hi Tejas,

     

    Instead of a motion, you could apply a force acting on the plunger. This is an iterative process to perfect the motion.

     

    Best,

     

    Christopher Fadanelli

  • GTT Adam
    GTT Adam
    Altair Employee
    edited May 28
    Tejas Milind Gangawane said:

    Thank you for your Response.

    You know any other method through which I can give motion to the plunger  without applying  motion command in motion view?

    Hi Tejas,

    Building on Praful and Chris' comments:

    The Motion entity will overpower any contact, so it must be removed.

    The motion of the object can be accomplished by either a Force or an Initial Velocity.

    If you are going to use a Force, then you could first plot the resultant force output from when you used a Motion and then apply a force profile that is similar. That can take most of the guess-work out of what magnitude of force to apply and for what duration to achieve the desired result.

     

    Hope this helps!

    Adam Reid

  • Sumit Dhane_20960
    Sumit Dhane_20960 Altair Community Member
    edited June 4

    Can increase in contact stiffness also affect the simulation?

     

  • GTT Adam
    GTT Adam
    Altair Employee
    edited June 4
    Sumit Dhane_20960 said:

    Can increase in contact stiffness also affect the simulation?

     

    Hi Sumit,

    If the contact is being initiated by one body colliding into another, rather than a body being moved into another by a Motion entity, then yes. An increase in the contact stiffness (using the Impact formulation) will reduce the penetration. 

     

    Hope this helps!

    Adam Reid

Categories