Odd shear design part.
Odd shear design part.
(OP)
Howdy,
As seen in the attached picture, I have a rod with two "ears" that will support a normal load on the green face, by making contact with the transparent collar on the red faces.

I have calculated out the shear force, based upon the shear area created by the arc*length of the ear. Most everyone around here seems to think that this is enough. I am worried about the Height of the ears (major Radius of the ear)-(shaft radius). I Don't want to be broaching out the collar.
Background info.
Force normal to green face is a 24,000 lb impact strike.
Safety factor of 2.5 or better required.
in current config the shear force to fail the ears is sitting at 70,600 lb.
Both materials are a type of steel with a yield in hardened state of no less than 90ksi.
...but that doesn't tell me how tall they need to be.
Any ideas for some sound formulas I can throw at this?
As seen in the attached picture, I have a rod with two "ears" that will support a normal load on the green face, by making contact with the transparent collar on the red faces.

I have calculated out the shear force, based upon the shear area created by the arc*length of the ear. Most everyone around here seems to think that this is enough. I am worried about the Height of the ears (major Radius of the ear)-(shaft radius). I Don't want to be broaching out the collar.
Background info.
Force normal to green face is a 24,000 lb impact strike.
Safety factor of 2.5 or better required.
in current config the shear force to fail the ears is sitting at 70,600 lb.
Both materials are a type of steel with a yield in hardened state of no less than 90ksi.
...but that doesn't tell me how tall they need to be.
Any ideas for some sound formulas I can throw at this?





RE: Odd shear design part.
Calculate the ear/collar contact area.
Evaluate the interface stress against the material strength. Face compression. Projected shear area through the collar.
Ted
RE: Odd shear design part.
I have a nasty excel sheet for calculating the ear collar contact area to back up the solid model.... should be able to project the profile without hassle and check it with the model.
The arcs will remain constant, and by adding length, that will add to the perimeter of the shear profile in the collar giving a positive correlation between increase in length and increased shear resistance.
That sounds like it's a real good step in the right direction! Thanks!
Will check out face compression, but I already calculated the flex of the ears to be a little less than .002"... I'm hoping that will be the weaker of the two.
Thanks!
RE: Odd shear design part.
RE: Odd shear design part.
Cheers
Greg Locock
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RE: Odd shear design part.
Ted
RE: Odd shear design part.
RE: Odd shear design part.
Tobalcane
"If you avoid failure, you also avoid success."
RE: Odd shear design part.
@Twoballcane
here is a link to what I have been working with...
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RE: Odd shear design part.