Dynamic pin shear force 2

[LeonhardEuler]

How do I calculate the strength of a pin that will have a dynamic force on it from an object falling at several feet. Is using the simple formula of f=mv^2 adequate, or do I need to consider kinetic energy and impulse? Thanks

 

[WARose]

One additional thing you might consider is some sort localized deformation (i.e. contact stress). If you get a little, you might be able to justify less stiffness than you are using.

If not that, I'd look at your whole system (as suggested before) and ask yourself if a stiffness that high is really possible.

 

[LeonhardEuler]

I don't think there will be much deflection in the rest of the system except right at the pin hole. The pin is through vertical HSS tubes

 

[WARose]

By the way LE.....what is this thing? You mentioned 200 lbs falling something like 6 feet. This isn't fall protection is it? (The anchorage limit there (as per OSHA) is about 5000 lbs: people are too squishy to deliver much force.)

 

[LeonhardEuler]

Warose its not fall protection. It's proprietary info, but it is basically a steel object falling. Star for "people are too squishy" cause it made me laugh.

 

[WARose]

Thank you.