Boundary condition

[fembig]

Hello,

I analyze a part with rigid (fixed in all 6 dof) boundary conditions. But in reality, there will be some translational movement(3 directions), say around 1 mm. Is it possible to simulate this condition. How to specify. My solver is abaqus.

Thanks for your time.

fembig

 

[GBor]

Use directional springs with low stiffness along the direction of motion until the 1mm is reached and then a much higher stiffness. This can be done with a curve truss element if Abaqus' spring element doesn't allow non-linear properties. (Sorry, not familiar with Abaqus).

If you are doing a linear analysis, you may be able to use a gap element.

If you are doing non-linear analysis, you can use some type of impact plane or set up a "wall" for the part to contact when it moves 1mm.

I'm sure there are a couple of other options...but this is what comes off the top of my head.

Garland E. Borowski, PE
Borowski Engineering & Analytical Services, Inc.
Lower Alabama SolidWorks Users Group
Magnitude The Finite Element Analysis Magazine for the Engineering Community

 

[brep]

Use Abaqus's connector elements. There is a preassembled property for a bushing - you can define linear/nonlinear properties for just about everything you can imagine (elasticity, plasticity, damping, failure, stop, lock, damage...)