-Ben
Stress Test
-Ben
Define "nonlinear" in this case? Do you mean grain structure?David Anderson wrote:
keep in mind that nylon is a nonlinear material so the results for a linear static anlaysis are not really valid.
non-hookean, in layman's terms sounds like the force of the elasticity is harder to predict?David Anderson wrote:
first, plastics have nonlinear mechanical properties and thus are non hookean which means stress is NOT proportional to strain and modulus of elasticity E is not constant.
in a nonlinear material world, such as you have, using FEA, we cannot predict stress and deflections in this manner and have to solve them iteratively using nonlinear solvers.
second, because this material is a plastic, it will most likely undergo large deflections compared to a material made of metal of similar size and shape and these large deflections must be accounted for by using a geometric nonlinear solver.
for repeatable results, the staking process, be it hot or cold needs to be well controlled, probably better than "smashed"
sorry for the long reply...guess i got a little carried away.
Express has Nylon 6/10 but no 6/6, don't know the diff
restrained all the edges of the backing
Force load tested the boss to 35 lbs in sheer straight down.
Looks like a FOS of about 10, so is says it's safe to 350 lbs. (but that seems a little high)
The pic is with it loaded to 15 x the 35 lbs, you can see the red where the boss is starting to sheer off.