Monday, August 3, 2009

Preload Bolt Design Calculator Under Dynamic Loading

Bolt joint is one of the well known joining method in assembling of parts.

Quite often bot joint fails due to inappropriate practices and wrong load calculation. In most cases, the bolt tends to fail because not having enough pre-load while assembling it(loosened nut).

Pre-loading of bolt is important to reduce cyclic stresses, prevent pressure leakage, prevent joint separation or increase over all system stiffness.

Preload bolt design calculator 

As you can see in the above image, terms explained for bolt preload under dynamic condition is explained.

Preload bolt calculator dynamic loading

Fig: Preload Bolt Design calculator under dynamic loading


The calculator is really simple to use, inputs are straight forward. Enter the inputs like bolt thread size (metric) then define the initial stress, clamping force etc.,

Also you can check Tutorial of pre-load bolt design,Bolt Strength calculator  and why is it important.