Recovery Point Shape (1 Viewer)

[yohavos]

This is a potentially dumb and/or vague question, but here goes:

All things being equal, is one of these shapes better than the other, or does it matter? I'm thinking strength for pulls, ability to be bashed against things, etc. Let's say they're mounted either horizontally or vertically (the "point" being forward or down).

To be clear, I'm not asking about the particular clevis mounts in either of these pictures, but the different shapes (angle cuts vs. round).

Thank you!

 

[2mbb]

To me the "weakest" point is most likely going to the be weld joint, or what ever it is being welded to (ie thickness of the bumper). If this is true, the one with the greatest length for welding would probably be the strongest. Stronger still, I though would be a solid piece that extends through the bumper to the frame rail. Then weld the bumper to recover point. This way the recover pull is being applied directly to the frame and the strength of the bumper is taken out of the equation (mostly, I guess).

 

[canman]

I went with ascetics, and chose the one on the bottom right. Strength will depend on mat'l properties, and weld size, length etc. All that being equal the "strength", I think, it will depend on the amount of mat'l between the outer shackle hole and the outside surface based on a line drawn from the centre of the shackle hole parallel to the direction of force. Forces on the weld joint will be dependent on the geometry of the shape, meaning the greater the distance the shackle hole is from the mounting surface, the greater the "moment" will be on welded joint if the force is in any direction other than horizontal.

 

[LINUS]

From what my brain absorbed from crane rigging class at work, the lower pic right mount would be my bad actor #1.
The next worst would be the pair in the upper pic.
The most solid would be the mount in lower pic left.

The reasoning is that the weld is closest to the pick point - so most resisant to sideloading, and the weld footprint is greatest assuming you weld in the entire perimeter of all these mounts. Greater weld area = better dispursion of stress.

Really though, real world I'd just be positive in my welds than pick these designs apart - while I love what MIG does to allow the average guy to accomplish, you also can make a good looking weld with zero integrity.
A guy who normally welds some 1/8" wall box tube for toy mounts in his 40/60/80 won't know to bevel back & lay a hot root pass with buildup passes when he gets some plasma'ed 5/8" plates.