Pre Load in Bolt given Elongation of Bolt Calculator

✖Elongation of Bolt is the difference between the measurement in readings taken before and after tightening a bolt.ⓘ Elongation of Bolt [ẟ_b]			+10% -10%
✖The Stiffness of Boltt is the extent to which the bolt resists deformation in response to an applied force.ⓘ Stiffness of Bolt [k_b']			+10% -10%

✖Pre Load in Bolt is the tension created in a bolt when it is tightened.ⓘ Pre Load in Bolt given Elongation of Bolt [P_i]

⎘ Copy

👎

Formula

LaTeX

Reset

👍

Download Load and Strength Characteristics Formulas PDF PDF Image

Pre Load in Bolt given Elongation of Bolt Solution

STEP 0: Pre-Calculation Summary

Formula Used

Pre Load in Bolt = Elongation of Bolt*Stiffness of Bolt
P_i = ẟ_b*k_b'
This formula uses 3 Variables

Variables Used

Pre Load in Bolt - (Measured in Newton) - Pre Load in Bolt is the tension created in a bolt when it is tightened.
Elongation of Bolt - (Measured in Meter) - Elongation of Bolt is the difference between the measurement in readings taken before and after tightening a bolt.
Stiffness of Bolt - (Measured in Newton per Meter) - The Stiffness of Boltt is the extent to which the bolt resists deformation in response to an applied force.

STEP 1: Convert Input(s) to Base Unit

Elongation of Bolt: 0.05 Millimeter --> 5E-05 Meter (Check conversion here)
Stiffness of Bolt: 317000 Newton per Millimeter --> 317000000 Newton per Meter (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

P_i = ẟ_b*k_b' --> 5E-05*317000000

Evaluating ... ...

P_i = 15850

STEP 3: Convert Result to Output's Unit

15850 Newton --> No Conversion Required

FINAL ANSWER

15850 Newton <-- Pre Load in Bolt

(Calculation completed in 00.004 seconds)

You are here -

Home » Physics » Design of Machine Elements » Design of Coupling » Threaded Bolted Joints » Mechanical » Load and Strength Characteristics » Pre Load in Bolt given Elongation of Bolt

Credits

Created by Parul Keshav

National Institute of Technology (NIT), Srinagar

Parul Keshav has created this Calculator and 300+ more calculators!

Verified by Kethavath Srinath

Osmania University (OU), Hyderabad

Kethavath Srinath has verified this Calculator and 1200+ more calculators!

< Load and Strength Characteristics Calculators

Tensile Force on Bolt in Shear

LaTeX Go Tensile Force in Bolt = pi*Core Diameter of Bolt*Height of Nut*Shear Yield Strength of Bolt/Factor of Safety of Bolted Joint

Stiffness of Bolt given Thickness of Parts Joined by Bolt

LaTeX Go Stiffness of Bolt = (pi*Nominal Bolt Diameter^2*Modulus of Elasticity of Bolt)/(4*Total Thickness of Parts Held Together by Bolt)

Tensile Force on Bolt in Tension

LaTeX Go Tensile Force in Bolt = pi/4*Core Diameter of Bolt^2*Tensile Yield Strength of Bolt/Factor of Safety of Bolted Joint

Tensile Force on Bolt given Maximum Tensile Stress in Bolt

LaTeX Go Tensile Force in Bolt = Maximum Tensile Stress in Bolt*pi/4*Core Diameter of Bolt^2

Pre Load in Bolt given Elongation of Bolt Formula

LaTeX Go

Pre Load in Bolt = Elongation of Bolt*Stiffness of Bolt
P_i = ẟ_b*k_b'

What is the difference between Elongation and Compression?

Deformation is the change in the shape or dimensions of a body under the application of load, whereas Elongation is the change in length of the body under the application of load. So elongation is a form of deformation, but deformation needs not just be elongation alone.

How to Calculate Pre Load in Bolt given Elongation of Bolt?

Pre Load in Bolt given Elongation of Bolt calculator uses Pre Load in Bolt = Elongation of Bolt*Stiffness of Bolt to calculate the Pre Load in Bolt, Pre load in Bolt given Elongation of Bolt is defined as the tension created in a fastener when it is tightened. This tensile force in the bolt creates a compressive force in the bolted joint known as clamp force. For practical purposes, the clamping force in an unloaded bolted joint is assumed to be equal to and opposite to the preload. Pre Load in Bolt is denoted by P_i symbol.

How to calculate Pre Load in Bolt given Elongation of Bolt using this online calculator? To use this online calculator for Pre Load in Bolt given Elongation of Bolt, enter Elongation of Bolt (ẟ_b) & Stiffness of Bolt (k_b') and hit the calculate button. Here is how the Pre Load in Bolt given Elongation of Bolt calculation can be explained with given input values -> 15850 = 5E-05*317000000.

FAQ

What is Pre Load in Bolt given Elongation of Bolt?

Pre load in Bolt given Elongation of Bolt is defined as the tension created in a fastener when it is tightened. This tensile force in the bolt creates a compressive force in the bolted joint known as clamp force. For practical purposes, the clamping force in an unloaded bolted joint is assumed to be equal to and opposite to the preload and is represented as P_i = ẟ_b*k_b' or Pre Load in Bolt = Elongation of Bolt*Stiffness of Bolt. Elongation of Bolt is the difference between the measurement in readings taken before and after tightening a bolt & The Stiffness of Boltt is the extent to which the bolt resists deformation in response to an applied force.

How to calculate Pre Load in Bolt given Elongation of Bolt?

Pre load in Bolt given Elongation of Bolt is defined as the tension created in a fastener when it is tightened. This tensile force in the bolt creates a compressive force in the bolted joint known as clamp force. For practical purposes, the clamping force in an unloaded bolted joint is assumed to be equal to and opposite to the preload is calculated using Pre Load in Bolt = Elongation of Bolt*Stiffness of Bolt. To calculate Pre Load in Bolt given Elongation of Bolt, you need Elongation of Bolt (ẟ_b) & Stiffness of Bolt (k_b'). With our tool, you need to enter the respective value for Elongation of Bolt & Stiffness of Bolt and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Pre Load in Bolt?

In this formula, Pre Load in Bolt uses Elongation of Bolt & Stiffness of Bolt. We can use 2 other way(s) to calculate the same, which is/are as follows -

Pre Load in Bolt = Amount of Compression of Bolted Joint*Combined Stiffness of Bolt
Pre Load in Bolt = Wrench Torque for Bolt Tightening/(0.2*Nominal Bolt Diameter)

Home

FREE PDFs

🔍 Search