Initial Preload in Bolt due to Tightening Solution

STEP 0: Pre-Calculation Summary
Formula Used
Initial preload in bolt due to tightening of nut = Resultant load on bolt-Change in External Load
Pi = Pb-ΔPi
This formula uses 3 Variables
Variables Used
Initial preload in bolt due to tightening of nut - (Measured in Newton) - The Initial preload in bolt due to tightening of nut is defined as the difference between the resultant load on the bolt and change in external load.
Resultant load on bolt - (Measured in Newton) - Resultant load on bolt is the total resultant force/load acting on the bolt after tightening the bolt.
Change in External Load - (Measured in Newton) - Change in External Load is the amount of variation in the externally applied force or load.
STEP 1: Convert Input(s) to Base Unit
Resultant load on bolt: 6755 Newton --> 6755 Newton No Conversion Required
Change in External Load: 5905 Newton --> 5905 Newton No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Pi = Pb-ΔPi --> 6755-5905
Evaluating ... ...
Pi = 850
STEP 3: Convert Result to Output's Unit
850 Newton --> No Conversion Required
FINAL ANSWER
850 Newton <-- Initial preload in bolt due to tightening of nut
(Calculation completed in 00.004 seconds)

Credits

Created by Vaibhav Malani
National Institute of Technology (NIT), Tiruchirapalli
Vaibhav Malani has created this Calculator and 600+ more calculators!
Verified by Rajat Vishwakarma
University Institute of Technology RGPV (UIT - RGPV), Bhopal
Rajat Vishwakarma has verified this Calculator and 400+ more calculators!

17 Structural Response and Force Analysis Calculators

Change in external load on bolt given external load and stiffness of boad
Go Change in External Load = External Force on Bolt*(Stiffness of Threaded Bolt/(Stiffness of Threaded Bolt+Combined Stiffness of Gasket and Parts))
Tensile Stress Area of Threaded fastener
Go Tensile stress area of threaded fastener = (pi/4)*(((Pitch Diameter of External Thread+Minor Diameter of External Thread)/2)^2)
Shear Stress at Core Diameter of Threaded Fastener given Tensile Force
Go Shear stress in bolt = Tensile Force on Bolt/(pi*Core Diameter of Threaded Bolt*Height of nut)
Tensile Force acting on Bolt given Shear Stress
Go Tensile Force on Bolt = (pi*Shear stress in bolt*Core Diameter of Threaded Bolt*Height of nut)
Tensile Force acting on Bolt
Go Tensile Force on Bolt = (pi*Shear stress in bolt*Core Diameter of Threaded Bolt*Height of nut)
Tensile Stress in Core Cross-Section of Bolt given Tensile Force and Core Diameter
Go Tensile stress in bolt = Tensile Force on Bolt/((pi/4)*(Core Diameter of Threaded Bolt^2))
Tensile Force acting on Bolt given Tensile Stress
Go Tensile Force on Bolt = Tensile stress in bolt*pi*(Core Diameter of Threaded Bolt^2)/4
Change in Load on Bolt given Resultant Load and Initial Preload in Bolt
Go Change in External Load = Resultant load on bolt-Initial preload in bolt due to tightening of nut
Initial Preload in Bolt due to Tightening
Go Initial preload in bolt due to tightening of nut = Resultant load on bolt-Change in External Load
Resultant Load on Bolt
Go Resultant load on bolt = Initial preload in bolt due to tightening of nut+Change in External Load
Shear Stress at Core Diameter of Threaded Fasteners given Tensile Yield Strength
Go Shear stress in bolt = Tensile yield strength of bolt/(2*Factor of Safety for Bolt)
Tensile Stress in Core Cross-Section of Bolt given Tensile Yield Strength
Go Tensile stress in bolt = Tensile yield strength of bolt/Factor of Safety for Bolt
Tensile Yield Strength of Bolt
Go Tensile yield strength of bolt = Factor of Safety for Bolt*Tensile stress in bolt
Shear Stress at Core Diameter given Shear Yield Strength of Threaded Fastener
Go Shear stress in bolt = Shear yield strength of bolt/Factor of Safety for Bolt
Primary Shear Force on each Bolt
Go Primary shear load on bolt = External Force on Bolt/Number of Bolts in Joint
External Force on Bolt
Go External Force on Bolt = Number of Bolts in Joint*Primary shear load on bolt
Ultimate Tensile Strength of Bolt
Go Ultimate tensile strength of bolt = 2*Endurance limit of rotating beam bolt specimen

Initial Preload in Bolt due to Tightening Formula

Initial preload in bolt due to tightening of nut = Resultant load on bolt-Change in External Load
Pi = Pb-ΔPi

What is a fastener?

A fastener or fastening is a hardware device that mechanically joins or affixes two or more objects together. In general, fasteners are used to create non-permanent joints; that is, joints that can be removed or dismantled without damaging the joining components.

How to Calculate Initial Preload in Bolt due to Tightening?

Initial Preload in Bolt due to Tightening calculator uses Initial preload in bolt due to tightening of nut = Resultant load on bolt-Change in External Load to calculate the Initial preload in bolt due to tightening of nut, The Initial Preload in Bolt due to Tightening is encountered when we generally apply torque via wrench to bolt or nut to generate required tightening load. This tightening load is called preload. Preload is defined as tension created in fastener when it is tightened. Initial preload in bolt due to tightening of nut is denoted by Pi symbol.

How to calculate Initial Preload in Bolt due to Tightening using this online calculator? To use this online calculator for Initial Preload in Bolt due to Tightening, enter Resultant load on bolt (Pb) & Change in External Load (ΔPi) and hit the calculate button. Here is how the Initial Preload in Bolt due to Tightening calculation can be explained with given input values -> 850 = 6755-5905.

FAQ

What is Initial Preload in Bolt due to Tightening?
The Initial Preload in Bolt due to Tightening is encountered when we generally apply torque via wrench to bolt or nut to generate required tightening load. This tightening load is called preload. Preload is defined as tension created in fastener when it is tightened and is represented as Pi = Pb-ΔPi or Initial preload in bolt due to tightening of nut = Resultant load on bolt-Change in External Load. Resultant load on bolt is the total resultant force/load acting on the bolt after tightening the bolt & Change in External Load is the amount of variation in the externally applied force or load.
How to calculate Initial Preload in Bolt due to Tightening?
The Initial Preload in Bolt due to Tightening is encountered when we generally apply torque via wrench to bolt or nut to generate required tightening load. This tightening load is called preload. Preload is defined as tension created in fastener when it is tightened is calculated using Initial preload in bolt due to tightening of nut = Resultant load on bolt-Change in External Load. To calculate Initial Preload in Bolt due to Tightening, you need Resultant load on bolt (Pb) & Change in External Load (ΔPi). With our tool, you need to enter the respective value for Resultant load on bolt & Change in External Load and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
Let Others Know
Facebook
Twitter
Reddit
LinkedIn
Email
WhatsApp
Copied!