0

I know how to calculate the bolt capacity for tension and shear, also how to check bolt bearing against different elelment such as steel or aluminum.

There is a hanging bolt by which a bar is hanging and the bolt subject to pure tension loads.

How can I calculate the force will make the bolt to fail the thread and come out of the nut?

enter image description here

Transistor
  • 12,108
  • 2
  • 22
  • 32
Ghilman Dilshad
  • 1

2 Answers2

0

Nuts are designed to grip the bolts with greater force than the bolt's tensile strength. So theoretically pull out tensile force T is, $$T_{bolt}=Area_{bolt}*\sigma_{y_{bolt}}$$

Depending on the application there are code factors applied.

Here is an AISC commentary article on bolt codes. source

kamran
  • 23,517
  • 2
  • 22
  • 42
0

Approximately the force in bolt $$ F = A \cdot \sigma, ~A= \pi d^2/4$$ Shear Load $$ F_s = \pi \cdot d \cdot L_{nut}$$ For nut to hold $$ F_s < F.$$

Narasimham
  • 287
  • 2
  • 9