Pin Bending in Lugs
The following information should be used for sizing calculations ONLY! Any formal calculations MUST use values/standards from relevant company or engineering standards.
In our previous post about lugs we spoke about lugs being a great way to transmit mechanical load when used with a clevis pin. The following equations will allow us to size the correct size pin for this application.
Pin Bending Stress
As a conservative approach, the load on the pin can be assumed as uniformly distributed across its length for bending purposes.
The following approach will ensure that the pin is sufficiently stiff in order to counteract this type of failure.
Bending Moment in Pin
Bending Stress in Pin
Pin Shear Stress
To calculate the shear stress in the pin, we can take the applied load P and divided that by the pin cross sectional area. Note that the applied load P is shared across both outer lugs/plates, therefore can be divided by 2!
