Constraints and forces oh hook

[jigruss01]

Hello,

I’m trying to analyze this part, but I’m having trouble properly constraining it and applying the loads.

I’ve tried several combinations of constraints and force placements, but I’m not getting results that accurately reflect the real behavior of the part.

The hook hangs from a chain and supports a load on the curved section.

Any guidance would be greatly appreciated.

Thanks in advance!

[CCarreiras]

Hi!

I believe you need better boundary conditions where the loads and support act the hook

For that, you can split some faces to have only the area where the loads will be applied.
This will get more realistic boundary conditions.
Do that also in fix area(where the hook contact the chain).

Example:

[JDMather]

@jigruss01 

If you still can't figure it out after reading @CCarreiras reply, can you Attach the *.ipt file here?

[jigruss01]

I understand splitting the face to better represent the interaction, but what kind of boundary condition would you apply to the hook portion?

[jigruss01]

Here´s the ipt.

[CCarreiras · Accepted solution]

In real conditions, when you load something in the hook, it will bounce in the centers direction, right?

So, fix the upper contact area between the hook and the chain, and then apply the load in the axis between centers direction.
I believe this is a good approximation to the real conditions.

Anyway, the results will be closed for both cases what you got and what i got.

Notes:
You can add the gravity force, but in this case will not change much... is negligible.
Don't confuse loads with constraints... you don't have any load (moment or other load) in the top hook, is just supported (fixed) by the chain in that angle (between centers).

[jigruss01]

Makes sense—thanks!

Initially, I tried applying the force vertically, but that didn't seem right since the boundary condition was introducing an unrealistic moment on the hook, resulting in higher stresses than expected.

Using your approach, the stresses are much lower and there's almost no loading at the transitions between the hook and the handle, which aligns better with reality.