Calculating Shear Stress In Bolts

shear stress
A shear stress, denoted (tau), is defined as a stress which is applied parallel or tangential to a face of a material, as opposed to a normal stress which is applied perpendicularly.
A tangential force divided by the area (FORCE/AREA) on which it is applied. The shear stress is equal to the viscosity multiplied by the shear rate (measured in units of pressure, i.e., MPa or psi). At the die lips under usual production conditions, the shear stress may reach values of 0.
Stress acting parallel to an imaginary plane cut through an object.

calculating
Acting in a scheming and ruthlessly determined way
used of persons; "the most calculating and selfish men in the community"
(calculatingly) in a calculating manner; "he looked at her calculatingly"
(calculate) make a mathematical calculation or computation

bolts
A roll of fabric, originally as a measure
(bolt) thunderbolt: a discharge of lightning accompanied by thunder
(bolt) move or jump suddenly; "She bolted from her seat"
(bolt) rigidly: in a rigid manner; "the body was rigidly erect"; "he sat bolt upright"