Force Acting on Connecting Rod Solution

STEP 0: Pre-Calculation Summary
Formula Used
Force on Connecting Rod = Force on Piston Head/cos(Inclination of Connecting Rod with Line of Stroke)
Pcr = P/cos(φ)
This formula uses 1 Functions, 3 Variables
Functions Used
cos - Cosine of an angle is the ratio of the side adjacent to the angle to the hypotenuse of the triangle., cos(Angle)
Variables Used
Force on Connecting Rod - (Measured in Newton) - Force on connecting rod is the force acting on the connecting rod of an IC Engine during operation.
Force on Piston Head - (Measured in Newton) - Force on piston head is the force due to the combustion of gases onto the top of a piston head.
Inclination of Connecting Rod with Line of Stroke - (Measured in Radian) - Inclination of connecting rod with line of stroke is the angle of inclination of the connecting rod with the line of stroke of the piston.
STEP 1: Convert Input(s) to Base Unit
Force on Piston Head: 18500 Newton --> 18500 Newton No Conversion Required
Inclination of Connecting Rod with Line of Stroke: 15.5 Degree --> 0.27052603405907 Radian (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Pcr = P/cos(φ) --> 18500/cos(0.27052603405907)
Evaluating ... ...
Pcr = 19198.2309591813
STEP 3: Convert Result to Output's Unit
19198.2309591813 Newton --> No Conversion Required
FINAL ANSWER
19198.2309591813 19198.23 Newton <-- Force on Connecting Rod
(Calculation completed in 00.004 seconds)

Credits

Created by Saurabh Patil
Shri Govindram Seksaria Institute of Technology and Science (SGSITS ), Indore
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11 Buckling in Connecting Rod Calculators

Critical Buckling Load on Connecting Rod by Rankine Formula
Go Critical buckling load on connecting rod = Compressive Yield Stress*Cross Sectional Area of Connecting Rod/(1+Constant used in Buckling Load Formula*(Length of Connecting Rod/Radius of Gyration of I Section about XX Axis)^2)
Whipping Stress in Connecting Rod of I Cross Section
Go Whipping Stress = Mass of Connecting Rod*Angular Velocity of Crank^2*Crank Radius of Engine*Length of the connecting rod*4.593/(1000*Thickness of Flange and Web of I Section^3)
Critical Buckling Load on Steel Connecting Rod given Thickness of Flange or Web of Connecting Rod
Go Critical buckling load on connecting rod = (261393*Compressive Yield Stress*Thickness of Flange and Web of I Section^4)/(23763*Thickness of Flange and Web of I Section^2+Length of Connecting Rod)
Maximum Force Acting on Connecting Rod given Maximum Gas Pressure
Go Force on Connecting Rod = pi*Inner Diameter of Engine Cylinder^2*Maximum pressure in engine cylinder/4
Force Acting on Connecting Rod
Go Force on Connecting Rod = Force on Piston Head/cos(Inclination of Connecting Rod with Line of Stroke)
Area Moment of Inertia for Connecting Rod Cross Section
Go Area moment of Inertia for Connecting Rod = Cross Sectional Area of Connecting Rod*Radius of Gyration for Connecting Rod^2
Critical Buckling Load on Connecting Rod Considering Factor of Safety
Go Critical buckling load on connecting rod = Force on Connecting Rod*Factor of Safety for Connecting Rod
Radius of Gyration of I Cross Section about yy Axis
Go Radius of Gyration of I Section about YY Axis = 0.996*Thickness of Flange and Web of I Section
Radius of Gyration of I Cross Section about xx Axis
Go Radius of Gyration of I Section about XX Axis = 1.78*Thickness of Flange and Web of I Section
Height of Cross Section of Connecting Rod at Middle Section
Go Height of Connecting Rod at Mid Section = 5*Thickness of Flange and Web of I Section
Width of I Cross Section of Connecting Rod
Go Width of Connecting Rod = 4*Thickness of Flange and Web of I Section

Force Acting on Connecting Rod Formula

Force on Connecting Rod = Force on Piston Head/cos(Inclination of Connecting Rod with Line of Stroke)
Pcr = P/cos(φ)

Forces on Connecting Rod

During each rotation of the crankshaft, the connecting rod is often subject to large and repetitive forces: shear forces due to the angle between the piston and the crankpin, compression forces as the piston moves downwards, and tensile forces as the piston move upwards. These forces are proportional to the engine speed (RPM) squared.

Failure of Connecting Rod

Failure of a connecting rod often called "throwing a rod", is one of the most common causes of catastrophic engine failure in cars, frequently driving the broken rod through the side of the crankcase and thereby rendering the engine irreparable. Common causes of connecting rod failure are tensile failure from high engine speeds, the impact force when the piston hits a valve (due to a valvetrain problem), rod bearing failure (usually due to a lubrication problem), or incorrect installation of the connecting rod.

How to Calculate Force Acting on Connecting Rod?

Force Acting on Connecting Rod calculator uses Force on Connecting Rod = Force on Piston Head/cos(Inclination of Connecting Rod with Line of Stroke) to calculate the Force on Connecting Rod, Force acting on connecting rod is the force that is transferred from the piston to the connecting rod. Force on Connecting Rod is denoted by Pcr symbol.

How to calculate Force Acting on Connecting Rod using this online calculator? To use this online calculator for Force Acting on Connecting Rod, enter Force on Piston Head (P) & Inclination of Connecting Rod with Line of Stroke (φ) and hit the calculate button. Here is how the Force Acting on Connecting Rod calculation can be explained with given input values -> 19198.23 = 18500/cos(0.27052603405907).

FAQ

What is Force Acting on Connecting Rod?
Force acting on connecting rod is the force that is transferred from the piston to the connecting rod and is represented as Pcr = P/cos(φ) or Force on Connecting Rod = Force on Piston Head/cos(Inclination of Connecting Rod with Line of Stroke). Force on piston head is the force due to the combustion of gases onto the top of a piston head & Inclination of connecting rod with line of stroke is the angle of inclination of the connecting rod with the line of stroke of the piston.
How to calculate Force Acting on Connecting Rod?
Force acting on connecting rod is the force that is transferred from the piston to the connecting rod is calculated using Force on Connecting Rod = Force on Piston Head/cos(Inclination of Connecting Rod with Line of Stroke). To calculate Force Acting on Connecting Rod, you need Force on Piston Head (P) & Inclination of Connecting Rod with Line of Stroke (φ). With our tool, you need to enter the respective value for Force on Piston Head & Inclination of Connecting Rod with Line of Stroke 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 Force on Connecting Rod?
In this formula, Force on Connecting Rod uses Force on Piston Head & Inclination of Connecting Rod with Line of Stroke. We can use 1 other way(s) to calculate the same, which is/are as follows -
  • Force on Connecting Rod = pi*Inner Diameter of Engine Cylinder^2*Maximum pressure in engine cylinder/4
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