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I have a question on the stress analysis that has to do with a design that will be using a shoulder bolt. The bolts will be the primary loading points at either end of a vertically loaded swivel.
The mounting hole for the bolt will be called out at 0.3750" (+.0015/-.0010) as to have a close fit with the bolt.
Bolt Specs:
Nominal Shoulder Diameter: 3/8"
Length of Shoulder: 1.25"
Bolts spans a gap of 0.65"
Minimum tensile strength: 126,000 psi (416 stainless hardened to 26-32 RC)
A 3,000 lb maximum load will be centrally located on the bolt shoulder and will be considered to be acting at a single point as this would be the scenario producing the greatest stress on the bolt shoulder.
My question is this: When doing my stress analysis for the loading conditions I have looked at the double shear stress that will occur, but is the span (0.65") small enough in relation to the bolt diameter (0.375") that the instance of stress due to bending would or would not have to be looked at? When I do consider the stress due to bending the fact that I am loading the bolt to 3,000 lbs (not to mention the 11,250 lb test loading that will occur!) creates a Moment of around 500 lb*in - combined with a very small Section Modulus (1/1000 degree) makes the stress go through the roof.
I feel as though I am not looking at this problem properly and would like some direction or an example of how to go about this analysis.
Any direction would be greatly appreciated.
I have a question on the stress analysis that has to do with a design that will be using a shoulder bolt. The bolts will be the primary loading points at either end of a vertically loaded swivel.
The mounting hole for the bolt will be called out at 0.3750" (+.0015/-.0010) as to have a close fit with the bolt.
Bolt Specs:
Nominal Shoulder Diameter: 3/8"
Length of Shoulder: 1.25"
Bolts spans a gap of 0.65"
Minimum tensile strength: 126,000 psi (416 stainless hardened to 26-32 RC)
A 3,000 lb maximum load will be centrally located on the bolt shoulder and will be considered to be acting at a single point as this would be the scenario producing the greatest stress on the bolt shoulder.
My question is this: When doing my stress analysis for the loading conditions I have looked at the double shear stress that will occur, but is the span (0.65") small enough in relation to the bolt diameter (0.375") that the instance of stress due to bending would or would not have to be looked at? When I do consider the stress due to bending the fact that I am loading the bolt to 3,000 lbs (not to mention the 11,250 lb test loading that will occur!) creates a Moment of around 500 lb*in - combined with a very small Section Modulus (1/1000 degree) makes the stress go through the roof.
I feel as though I am not looking at this problem properly and would like some direction or an example of how to go about this analysis.
Any direction would be greatly appreciated.