Core Diameter of Bolts of Big End Cap of Connecting Rod Calculator

✖Inertia force on bolts of connecting rod is the force acting on the bolts of the connecting rod and cap joint due to the force on the piston head and its reciprocation.ⓘ Inertia Force on Bolts of Connecting Rod [P_i]			+10% -10%
✖Permissible Tensile Stress is the yield strength divided by the factor of safety or the amount of stress that the part can handle without failure.ⓘ Permissible Tensile Stress [σ_t]			+10% -10%

✖Core Diameter of Big End Bolt is defined as the smallest diameter of the thread of the bolt at the big end of the connecting rod.ⓘ Core Diameter of Bolts of Big End Cap of Connecting Rod [d_c]

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Formula

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Core Diameter of Bolts of Big End Cap of Connecting Rod

Formula

`"d"_{"c"} = sqrt(2*"P"_{"i"}/(pi*"σ"_{"t"}))`

Example

`"7.522528mm"=sqrt(2*"8000N"/(pi*"90N/mm²"))`

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Core Diameter of Bolts of Big End Cap of Connecting Rod Solution

STEP 0: Pre-Calculation Summary

Formula Used

Core Diameter of Big End Bolt = sqrt(2*Inertia Force on Bolts of Connecting Rod/(pi*Permissible Tensile Stress))
d_c = sqrt(2*P_i/(pi*σ_t))
This formula uses 1 Constants, 1 Functions, 3 Variables

Constants Used

pi - Archimedes' constant Value Taken As 3.14159265358979323846264338327950288

Functions Used

sqrt - A square root function is a function that takes a non-negative number as an input and returns the square root of the given input number., sqrt(Number)

Variables Used

Core Diameter of Big End Bolt - (Measured in Meter) - Core Diameter of Big End Bolt is defined as the smallest diameter of the thread of the bolt at the big end of the connecting rod.
Inertia Force on Bolts of Connecting Rod - (Measured in Newton) - Inertia force on bolts of connecting rod is the force acting on the bolts of the connecting rod and cap joint due to the force on the piston head and its reciprocation.
Permissible Tensile Stress - (Measured in Pascal) - Permissible Tensile Stress is the yield strength divided by the factor of safety or the amount of stress that the part can handle without failure.

STEP 1: Convert Input(s) to Base Unit

Inertia Force on Bolts of Connecting Rod: 8000 Newton --> 8000 Newton No Conversion Required
Permissible Tensile Stress: 90 Newton per Square Millimeter --> 90000000 Pascal (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

d_c = sqrt(2*P_i/(pi*σ_t)) --> sqrt(2*8000/(pi*90000000))

Evaluating ... ...

d_c = 0.00752252778063675

STEP 3: Convert Result to Output's Unit

0.00752252778063675 Meter -->7.52252778063675 Millimeter (Check conversion here)

FINAL ANSWER

7.52252778063675 ≈ 7.522528 Millimeter <-- Core Diameter of Big End Bolt

(Calculation completed in 00.004 seconds)

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Home » Physics » IC Engine » Design of IC Engine Components » Connecting Rod » Big End Cap and Bolt » Core Diameter of Bolts of Big End Cap of Connecting Rod

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Created by Saurabh Patil

Shri Govindram Seksaria Institute of Technology and Science (SGSITS ), Indore

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< 11 Big End Cap and Bolt Calculators

Inertia Force on Bolts of Connecting Rod

Go Inertia Force on Bolts of Connecting Rod = Mass of Reciprocating Parts in Engine Cylinder*Angular Velocity of Crank^2*Crank Radius of Engine*(cos(Crank Angle)+cos(2*Crank Angle)/Ratio of Length of Connecting Rod to Crank Length)

Maximum Inertia Force on Bolts of Connecting Rod

Go Max Inertia Force on Bolts of Connecting Rod = Mass of Reciprocating Parts in Engine Cylinder*Angular Velocity of Crank^2*Crank Radius of Engine*(1+1/Ratio of Length of Connecting Rod to Crank Length)

Thickness of Big End Cap of Connecting Rod given Bending Stress in Cap

Go Thickness of Big End Cap = sqrt(Inertia Force on Bolts of Connecting Rod*Span Length of Big End Cap/(Width of Big End Cap*Bending Stress in Big end of Connecting Rod))

Maximum Bending Moment on Connecting Rod

Go Bending moment on connecting rod = Mass of Connecting Rod*Angular Velocity of Crank^2*Crank Radius of Engine*Length of the Connecting Rod/(9*sqrt(3))

Width of Big End Cap of Connecting Rod given Bending Stress in Cap

Go Width of Big End Cap = Inertia Force on Bolts of Connecting Rod*Span Length of Big End Cap/(Thickness of Big End Cap^2*Bending Stress in Big end of Connecting Rod)

Maximum Bending Stress in Big End Cap of Connecting Rod

Go Bending Stress in Big end of Connecting Rod = Inertia Force on Bolts of Connecting Rod*Span Length of Big End Cap/(Thickness of Big End Cap^2*Width of Big End Cap)

Core Diameter of Bolts of Big End Cap of Connecting Rod

Go Core Diameter of Big End Bolt = sqrt(2*Inertia Force on Bolts of Connecting Rod/(pi*Permissible Tensile Stress))

Mass of Connecting Rod

Go Mass of Connecting Rod = Cross Sectional Area of Connecting Rod*Density of connecting rod material*Length of the Connecting Rod

Span Length of Big End Cap of Connecting Rod

Go Span Length of Big End Cap = Density of connecting rod material+2*Thickness of Bush+Nominal Bolt Diameter+0.003

Maximum Inertia Force on Bolts of Connecting Rod given Permissible Tensile Stress of Bolts

Go Inertia Force on Bolts of Connecting Rod = pi*Core Diameter of Big End Bolt^2*Permissible Tensile Stress/2

Bending Moment on Big End Cap of Connecting Rod

Go Bending Moment on Big End of Connecting Rod = Inertia Force on Bolts of Connecting Rod*Span Length of Big End Cap/6

Core Diameter of Bolts of Big End Cap of Connecting Rod Formula

Core Diameter of Big End Bolt = sqrt(2*Inertia Force on Bolts of Connecting Rod/(pi*Permissible Tensile Stress))
d_c = sqrt(2*P_i/(pi*σ_t))

Thread types on threaded fasteners

Threads on both metric and UTS fasteners are also categorized as coarse, fine, or extra-fine. UTS thread types are typically labeled UNC (Unified Coarse), UNF (Unified Fine), or (Unified Extra Fine (UNEF). There is no difference in manufacturing quality between coarse, fine, and extra-fine thread types, but there are differences in how they are employed.
Coarse threads are thicker and more durable than fine-threaded hardware. Coarse-threaded fasteners can also be installed more quickly. For instance, a 3/4-10 UNC requires 10 rotations to install 1 inch of the bolt shaft, while a 3/4-16 UNF would require 16 rotations.
Fine and extra-fine threads can be examined together. Their smaller pitches and greater TPI equate to better tensile strength, and a larger minor diameter provides better shear strength. Smaller thread helix angles also provide superior resistance to vibration in fine-threaded fasteners, a very important consideration.

How to Calculate Core Diameter of Bolts of Big End Cap of Connecting Rod?

Core Diameter of Bolts of Big End Cap of Connecting Rod calculator uses Core Diameter of Big End Bolt = sqrt(2*Inertia Force on Bolts of Connecting Rod/(pi*Permissible Tensile Stress)) to calculate the Core Diameter of Big End Bolt, Core diameter of bolts of big end cap of connecting rod is the minor diameter of the bolts used for fastening the big end cap to the connecting rod. Core Diameter of Big End Bolt is denoted by d_c symbol.

How to calculate Core Diameter of Bolts of Big End Cap of Connecting Rod using this online calculator? To use this online calculator for Core Diameter of Bolts of Big End Cap of Connecting Rod, enter Inertia Force on Bolts of Connecting Rod (P_i) & Permissible Tensile Stress (σ_t) and hit the calculate button. Here is how the Core Diameter of Bolts of Big End Cap of Connecting Rod calculation can be explained with given input values -> 7522.528 = sqrt(2*8000/(pi*90000000)).

FAQ

What is Core Diameter of Bolts of Big End Cap of Connecting Rod?

Core diameter of bolts of big end cap of connecting rod is the minor diameter of the bolts used for fastening the big end cap to the connecting rod and is represented as d_c = sqrt(2*P_i/(pi*σ_t)) or Core Diameter of Big End Bolt = sqrt(2*Inertia Force on Bolts of Connecting Rod/(pi*Permissible Tensile Stress)). Inertia force on bolts of connecting rod is the force acting on the bolts of the connecting rod and cap joint due to the force on the piston head and its reciprocation & Permissible Tensile Stress is the yield strength divided by the factor of safety or the amount of stress that the part can handle without failure.

How to calculate Core Diameter of Bolts of Big End Cap of Connecting Rod?

Core diameter of bolts of big end cap of connecting rod is the minor diameter of the bolts used for fastening the big end cap to the connecting rod is calculated using Core Diameter of Big End Bolt = sqrt(2*Inertia Force on Bolts of Connecting Rod/(pi*Permissible Tensile Stress)). To calculate Core Diameter of Bolts of Big End Cap of Connecting Rod, you need Inertia Force on Bolts of Connecting Rod (P_i) & Permissible Tensile Stress (σ_t). With our tool, you need to enter the respective value for Inertia Force on Bolts of Connecting Rod & Permissible Tensile Stress and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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