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Assembly / Contact Pairs / Transfering Load
Posted Jul 20, 2010, 4:48 p.m. EDT 1 Reply
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This seems to be the most basic form of analysis - a nylon part with steel rods inside and need to determine approx. how much bending will occur when a face load is applied.
I will fully admit to being a neophite in terms of FEA analysis - and I cannot get this simple problem to work. When loading the outer nylon surface, the inner rods are not coupled with the forces. Making a contact pair seem to not solve the problem - in fact it crashes and will not solve.
Any suggestions / assistance would be greatly appreciated.
Thanks,
Maine_Guy
I will fully admit to being a neophite in terms of FEA analysis - and I cannot get this simple problem to work. When loading the outer nylon surface, the inner rods are not coupled with the forces. Making a contact pair seem to not solve the problem - in fact it crashes and will not solve.
Any suggestions / assistance would be greatly appreciated.
Thanks,
Maine_Guy
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1 Reply Last Post Jul 21, 2010, 5:16 a.m. EDT
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Posted:
1 decade ago
Hi
You have a few possible approaches (probably only one will easily converge)
1) simplest: you say that your nylon plate is "welded" to the steel wires, you use "Form union" for the geometry closure, no pairs, but normal continuity on the bondary conditions. You fix the wire ends (by the way why do you fix the nylon ends and not the wire ends, one nylon plate end should be fixed) and load the plate surface. Then solve (you could also add gravity as a "body load" with F[N/m^3]=g_const*solid.rho)
2) you say the the nylon plate slide freely along the wires, then you would need either contact pairs (with probably convergence issues) or you could imagine some identity pairs and free the tangental couplings via week constrintsa or specific boundary equations
I would have stared with 1) ,even if the case 2) is more fun, but more complex to validate and then to solve
--
Good luck
Ivar
You have a few possible approaches (probably only one will easily converge)
1) simplest: you say that your nylon plate is "welded" to the steel wires, you use "Form union" for the geometry closure, no pairs, but normal continuity on the bondary conditions. You fix the wire ends (by the way why do you fix the nylon ends and not the wire ends, one nylon plate end should be fixed) and load the plate surface. Then solve (you could also add gravity as a "body load" with F[N/m^3]=g_const*solid.rho)
2) you say the the nylon plate slide freely along the wires, then you would need either contact pairs (with probably convergence issues) or you could imagine some identity pairs and free the tangental couplings via week constrintsa or specific boundary equations
I would have stared with 1) ,even if the case 2) is more fun, but more complex to validate and then to solve
--
Good luck
Ivar