Bolt Pull Out Force Calculator

Bolt Pull Out Force Calculator:

Enter the values of bolt’s diameter, D_(m), engaged length of the bolt L_(m) and material’s shear strength, MF_(Pa) to determine the value of bolt pull out force, F_po(N).

Enter Diameter :		m
Enter Length of the Bolt :		m
Enter Materials Shear Strength :		Pa
Result – Bolt Pull Out Force :		N

Bolt Pull Out Force Calculator:

The bolt pull out force is a measure of the force required to pull a bolt out of its host material, essentially evaluating the bolt’s anchoring strength in that material.

Bolt Pull Out Force, F_po(N) in Newtons is determined by multiplying the bolt’s diameter, D_(m) in metres by Pi, the engaged length of the bolt L_(m) in metres and the material’s shear strength, MF_(Pa) in Pascals.

Bolt Pull Out Force, F_po(N) = D_(m) * pi * L_(m) * MF_(Pa)

F_po(N) = bolt pull out force in Newtons, N.

D_(m) = diameter in metres, m.

L_(m) = length of the bolt in metres, m.

MF_(Pa) = materials shear strength in Pascals, Pa.

Bolt Pull Out Force Calculation:

1.Calculate the pull out force for a bolt with a diameter of 0.01m, engaged in a material for 0.05m, with the material’s shear strength being 400 MPa.

Given: D_(m) = 0.01m, L_(m) = 0.05, MF_(Pa) = 400MPA.

Bolt Pull Out Force, F_po(N) = D_(m) * pi * L_(m) * MF_(Pa)

F_po(N) = 0.01 * 3.14 * 0.05 * 400 * 10⁶

F_po(N) = 628000.00N.

2.Suppose you need to determine the shear strength of the material from which a bolt was pulled out. The pull out force was measured as 10,000N. The bolt has a diameter of 0.01 metres and was engaged in the material for a length of 0.05 metres.

Given: D_(m) = 0.01m, L_(m) = 0.05, F_po(N) = 10,000N.

Bolt Pull Out Force, F_po(N) = D_(m) * pi * L_(m) * MF_(Pa)

MF_(Pa) =  F_po(N) / D_(m) * pi * L_(m)

MF_(Pa) = 10,000 / 0.01 * 3.14 * 0.05

MF_(Pa) = 6,369,426.752Pa.