Problem using fasteners through multiple solids.

[klegall]

Hi,

I'm using Creo Simulate 3.0 and I'm having trouble using fasteners through more than 2 solids.

Creo keeps saying my model isn't constrained enough even after putting grounded springs of infinitely small values to try to trick him. Has anybody used Creo fasteners in a similar case ?

Thanks in advance.

Kevin L.

EDIT: Finaly got it working by placing two simple springs of infinitely small stiffness between each pair of solids.

[gfraulini]

Hi,

the Simulate's internal Fastener tool works only between two components.

If you want a screw/bolt that intersects three or more parts you have to use a "solid screw" with preload. If you use Creo 3 there is a specific tool named "preload". For the previous releases you can utilize a thermal load on a solid element or a beam.

What you've done with the springs is another workaround.

Remember that if you are interested to have a detailed view of what happen near the screw/bolt hole, you need to use contact regions between between each parts, with or without friction depends always on the level of detail.

Bye