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Pre Load in Bolt given Elongation of Bolt Formula

GoPre Load in Bolt given Amount of Compression in Parts Joined by Bolt Formula

GoPre Load in Bolt given Wrench Torque Formula

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Pre Load in Bolt is the tension created in a bolt when it is tightened. Check FAQs

P i = ẟ b \cdot k b'

P_i - Pre Load in Bolt?ẟ_b - Elongation of Bolt?k_b' - Stiffness of Bolt?

Pre Load in Bolt given Elongation of Bolt Example

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Here is how the Pre Load in Bolt given Elongation of Bolt equation looks like with Values.

Here is how the Pre Load in Bolt given Elongation of Bolt equation looks like with Units.

Here is how the Pre Load in Bolt given Elongation of Bolt equation looks like.

15850 = 0.05 \cdot 317000

15850N = 0.05mm \cdot 317000N/mm

15850 = 0.05 \cdot 317000

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Pre Load in Bolt given Elongation of Bolt Solution

Follow our step by step solution on how to calculate Pre Load in Bolt given Elongation of Bolt?

FIRST Step Consider the formula

P i = ẟ b \cdot k b'

Next Step Substitute values of Variables

∴

P i = 0.05mm \cdot 317000N/mm

Next Step Convert Units

∴

P i = 5E-5m \cdot 3.2E+8N/m

Next Step Prepare to Evaluate

∴

P i = 5E-5 \cdot 3.2E+8

LAST Step Evaluate

∴

P i = 15850N

Pre Load in Bolt given Elongation of Bolt Formula Elements

Variables

Pre Load in Bolt

Pre Load in Bolt is the tension created in a bolt when it is tightened.

Symbol: P_i

Measurement: ForceUnit: N

Note: Value should be greater than 0.

Formulas to find Pre Load in Bolt

Elongation of Bolt

Elongation of Bolt is the difference between the measurement in readings taken before and after tightening a bolt.

Symbol: ẟ_b

Measurement: LengthUnit: mm

Note: Value should be greater than 0.

Formulas to find Elongation of Bolt

Stiffness of Bolt

The Stiffness of Boltt is the extent to which the bolt resists deformation in response to an applied force.

Symbol: k_b'

Measurement: Stiffness ConstantUnit: N/mm

Note: Value should be greater than 0.

Formulas to find Stiffness of Bolt

Other Formulas to find Pre Load in Bolt

Go Pre Load in Bolt given Amount of Compression in Parts Joined by Bolt

P i = δ c \cdot k

Go Pre Load in Bolt given Wrench Torque

P i = \frac{M t}{0.2 \cdot d}

Other formulas in Load and Strength Characteristics category

Go Tensile Force on Bolt given Maximum Tensile Stress in Bolt

P tb = σt max \cdot \frac{π}{4} \cdot {d c}^{2}

Go Tensile Force on Bolt in Tension

P tb = \frac{π}{4} \cdot {d c}^{2} \cdot \frac{S yt}{f s}

Go Tensile Force on Bolt in Shear

P tb = π \cdot d c \cdot h \cdot \frac{S sy}{f s}

Go Stiffness of Bolt given Thickness of Parts Joined by Bolt

k b' = \frac{π \cdot d^{2} \cdot E}{4 \cdot l}

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

Pre Load in Bolt given Elongation of Bolt evaluator uses Pre Load in Bolt = Elongation of Bolt*Stiffness of Bolt to evaluate 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 evaluate Pre Load in Bolt given Elongation of Bolt using this online evaluator? To use this online evaluator 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.

FAQs on Pre Load in Bolt given Elongation of Bolt

What is the formula to find Pre Load in Bolt given Elongation of Bolt?

The formula of Pre Load in Bolt given Elongation of Bolt is expressed as Pre Load in Bolt = Elongation of Bolt*Stiffness of Bolt. Here is an example- 15850 = 5E-05*317000000.

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

With Elongation of Bolt (ẟ_b) & Stiffness of Bolt (k_b') we can find Pre Load in Bolt given Elongation of Bolt using the formula - Pre Load in Bolt = Elongation of Bolt*Stiffness of Bolt.

What are the other ways to Calculate Pre Load in Bolt?

Here are the different ways to Calculate Pre Load in Bolt-

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)

Can the Pre Load in Bolt given Elongation of Bolt be negative?

No, the Pre Load in Bolt given Elongation of Bolt, measured in Force cannot be negative.

Which unit is used to measure Pre Load in Bolt given Elongation of Bolt?

Pre Load in Bolt given Elongation of Bolt is usually measured using the Newton[N] for Force. Exanewton[N], Meganewton[N], Kilonewton[N] are the few other units in which Pre Load in Bolt given Elongation of Bolt can be measured.

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Pre Load in Bolt given Elongation of Bolt Formula

​GoPre Load in Bolt given Amount of Compression in Parts Joined by Bolt Formula

​GoPre Load in Bolt given Wrench Torque Formula

Pre Load in Bolt given Elongation of Bolt Example

Pre Load in Bolt given Elongation of Bolt Solution

Pre Load in Bolt given Elongation of Bolt Formula Elements

Other Formulas to find Pre Load in Bolt

Other formulas in Load and Strength Characteristics category

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

FAQs on Pre Load in Bolt given Elongation of Bolt

Variable Name

GoPre Load in Bolt given Amount of Compression in Parts Joined by Bolt Formula

GoPre Load in Bolt given Wrench Torque Formula