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jurgen.roobroek1-Visitor
1-Visitor
July 3, 2007
Question

Constraints for L-shaped lever

  • July 3, 2007
  • 2 replies
  • 1345 views
Hello,

Can somebody tell me how to constraint an L-shaped lever? It is supposed to rotate freely in the bearing in the corner point, the load is applied in the bearing at the end ofone leg and the lever is driven in the bearing at the end ofthe other leg.

I created a cylindrical cs1 in the rotation point and constraint everything except theta direction. I applied a bearing load in one of the leg bearings, but don't know how exactly to constraint the other leg bearing.

With my method, I see only stresses and deformations in the leg with the applied load.

Can somebody help me please? Thank you

    2 replies

    J
    jurgen.roobroek1-VisitorAuthor
    1-Visitor
    July 3, 2007
    I attached a small skecth, maybe this clarifies my problem:Bearing load F in first bearingConstraint in second (corner) bearing: R and Z around cilindrical csConstraint in third bearing: to be determinedIt is possible to calculate the necessary force in the third bearing and apply this, butI am wondering if it can be simulated without doing this.Another possibility isa linear constraint in the third bearing(perpendicular to the applied load), but thisprevents that end of the arm from rotating, which is incorrect.Thanks
    M
    matthew_loew1-Visitor
    1-Visitor
    July 3, 2007
    Jurgen,

    I would not use a constraint at all, but an additional bearing force that
    holds the lever in static equilibrium. Having parts in static equilibrium is
    almost always a better way to constrain a model. I try to only use enough
    constraints that eliminate rigid body motion and ensure that there are no
    stress concentrations at the constraints.

    Let me know if you have any questions about this approach.

    Best regards,

    Matthew




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