Bending moment at central plane of crank web of centre crankshaft at TDC position Calculator

✖Vertical Reaction at Bearing 1 due to Crankpin Force is the vertical reaction force acting on the 1st bearing of the crankshaft because of the force acting onto the crankpin.ⓘ Vertical Reaction at Bearing 1 [R_v1]			+10% -10%
✖Centre Crankshaft Bearing1 Gap from CrankPinCentre is the distance between the 1st bearing of a centre crankshaft and the line of action of force on the crank pin.ⓘ Centre Crankshaft Bearing1 Gap from CrankPinCentre [b₁]			+10% -10%
✖Length of Crank Pin is the size of the crankpin from one end to the other and tells how long is the crankpin.ⓘ Length of Crank Pin [l_c]			+10% -10%
✖Thickness of Crank Web is defined as the thickness of the crank web (the portion of a crank between the crankpin and the shaft) measured parallel to the crankpin longitudinal axis.ⓘ Thickness of Crank Web [t]			+10% -10%

✖Bending Moment at Central Plane of Crank Web is the reaction induced in the central plane of the crank web when an external force or moment is applied to the crank web causing it to bend.ⓘ Bending moment at central plane of crank web of centre crankshaft at TDC position [M_b]

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Bending moment at central plane of crank web of centre crankshaft at TDC position Solution

STEP 0: Pre-Calculation Summary

Formula Used

Bending Moment at Central Plane of Crank Web = Vertical Reaction at Bearing 1*(Centre Crankshaft Bearing1 Gap from CrankPinCentre-Length of Crank Pin/2-Thickness of Crank Web/2)
M_b = R_v1*(b₁-l_c/2-t/2)
This formula uses 5 Variables

Variables Used

Bending Moment at Central Plane of Crank Web - (Measured in Newton Meter) - Bending Moment at Central Plane of Crank Web is the reaction induced in the central plane of the crank web when an external force or moment is applied to the crank web causing it to bend.
Vertical Reaction at Bearing 1 - (Measured in Newton) - Vertical Reaction at Bearing 1 due to Crankpin Force is the vertical reaction force acting on the 1st bearing of the crankshaft because of the force acting onto the crankpin.
Centre Crankshaft Bearing1 Gap from CrankPinCentre - (Measured in Meter) - Centre Crankshaft Bearing1 Gap from CrankPinCentre is the distance between the 1st bearing of a centre crankshaft and the line of action of force on the crank pin.
Length of Crank Pin - (Measured in Meter) - Length of Crank Pin is the size of the crankpin from one end to the other and tells how long is the crankpin.
Thickness of Crank Web - (Measured in Meter) - Thickness of Crank Web is defined as the thickness of the crank web (the portion of a crank between the crankpin and the shaft) measured parallel to the crankpin longitudinal axis.

STEP 1: Convert Input(s) to Base Unit

Vertical Reaction at Bearing 1: 10725 Newton --> 10725 Newton No Conversion Required
Centre Crankshaft Bearing1 Gap from CrankPinCentre: 90 Millimeter --> 0.09 Meter (Check conversion here)
Length of Crank Pin: 43 Millimeter --> 0.043 Meter (Check conversion here)
Thickness of Crank Web: 40 Millimeter --> 0.04 Meter (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

M_b = R_v1*(b₁-l_c/2-t/2) --> 10725*(0.09-0.043/2-0.04/2)

Evaluating ... ...

M_b = 520.1625

STEP 3: Convert Result to Output's Unit

520.1625 Newton Meter --> No Conversion Required

FINAL ANSWER

520.1625 Newton Meter <-- Bending Moment at Central Plane of Crank Web

(Calculation completed in 00.093 seconds)

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Home » Physics » IC Engine » Design of IC Engine Components » Crankshaft » Design of Centre Crankshaft » Mechanical » Design of Crank Web at Top Dead Centre Position » Bending moment at central plane of crank web of centre crankshaft at TDC position

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< Design of Crank Web at Top Dead Centre Position Calculators

Width of crank web of centre crankshaft at TDC position given compressive stress

LaTeX Go Width of Crank Web = (Vertical Reaction at Bearing 1)/(Compressive Stress in Crank Web Central Plane*Thickness of Crank Web)

Direct compressive stress in central plane of crank web of centre crankshaft at TDC position

LaTeX Go Compressive Stress in Crank Web Central Plane = Vertical Reaction at Bearing 1/(Width of Crank Web*Thickness of Crank Web)

Thickness of crank web of centre crankshaft at TDC position given diameter of crank pin

LaTeX Go Thickness of Crank Web = 0.7*Diameter of Crank Pin

Width of crank web of centre crankshaft at TDC position given diameter of crank pin

LaTeX Go Width of Crank Web = 1.14*Diameter of Crank Pin

Bending moment at central plane of crank web of centre crankshaft at TDC position Formula

LaTeX Go

Faults of Crankshaft

1. Worn Journals
It usually occurs when there is not enough oil pressure available. If the crankshaft makes contact with the journal bearing surfaces, it gradually increases clearance and worsens the oil pressure. If not taken care of it, worn journals can cause serious problems for the engine. This destroys the bearings and causes heavy damage to the engine.
2. Fatigue
This occurs when the constant force on the crankshaft leads to breakage. This issue usually occurs on the fillet where the journal and web are involved. A smooth surface of the fillet is necessary to avoid weak spots that cause fatigue cracks. The cracks can be inspected using Magna-fluxing on the crankshaft.

How to Calculate Bending moment at central plane of crank web of centre crankshaft at TDC position?

Bending moment at central plane of crank web of centre crankshaft at TDC position calculator uses Bending Moment at Central Plane of Crank Web = Vertical Reaction at Bearing 1*(Centre Crankshaft Bearing1 Gap from CrankPinCentre-Length of Crank Pin/2-Thickness of Crank Web/2) to calculate the Bending Moment at Central Plane of Crank Web, Bending moment at central plane of crank web of centre crankshaft at TDC position is the amount of bending moment onto the crank web due to the reaction force onto the bearings, designed for when the crank is at the top dead center position and subjected to maximum bending moment and no torsional moment. Bending Moment at Central Plane of Crank Web is denoted by M_b symbol.

How to calculate Bending moment at central plane of crank web of centre crankshaft at TDC position using this online calculator? To use this online calculator for Bending moment at central plane of crank web of centre crankshaft at TDC position, enter Vertical Reaction at Bearing 1 (R_v1), Centre Crankshaft Bearing1 Gap from CrankPinCentre (b₁), Length of Crank Pin (l_c) & Thickness of Crank Web (t) and hit the calculate button. Here is how the Bending moment at central plane of crank web of centre crankshaft at TDC position calculation can be explained with given input values -> 5.2E+8 = 10725*(0.09-0.043/2-0.04/2).

FAQ

What is Bending moment at central plane of crank web of centre crankshaft at TDC position?

Bending moment at central plane of crank web of centre crankshaft at TDC position is the amount of bending moment onto the crank web due to the reaction force onto the bearings, designed for when the crank is at the top dead center position and subjected to maximum bending moment and no torsional moment and is represented as M_b = R_v1*(b₁-l_c/2-t/2) or Bending Moment at Central Plane of Crank Web = Vertical Reaction at Bearing 1*(Centre Crankshaft Bearing1 Gap from CrankPinCentre-Length of Crank Pin/2-Thickness of Crank Web/2). Vertical Reaction at Bearing 1 due to Crankpin Force is the vertical reaction force acting on the 1st bearing of the crankshaft because of the force acting onto the crankpin, Centre Crankshaft Bearing1 Gap from CrankPinCentre is the distance between the 1st bearing of a centre crankshaft and the line of action of force on the crank pin, Length of Crank Pin is the size of the crankpin from one end to the other and tells how long is the crankpin & Thickness of Crank Web is defined as the thickness of the crank web (the portion of a crank between the crankpin and the shaft) measured parallel to the crankpin longitudinal axis.

How to calculate Bending moment at central plane of crank web of centre crankshaft at TDC position?

Bending moment at central plane of crank web of centre crankshaft at TDC position is the amount of bending moment onto the crank web due to the reaction force onto the bearings, designed for when the crank is at the top dead center position and subjected to maximum bending moment and no torsional moment is calculated using Bending Moment at Central Plane of Crank Web = Vertical Reaction at Bearing 1*(Centre Crankshaft Bearing1 Gap from CrankPinCentre-Length of Crank Pin/2-Thickness of Crank Web/2). To calculate Bending moment at central plane of crank web of centre crankshaft at TDC position, you need Vertical Reaction at Bearing 1 (R_v1), Centre Crankshaft Bearing1 Gap from CrankPinCentre (b₁), Length of Crank Pin (l_c) & Thickness of Crank Web (t). With our tool, you need to enter the respective value for Vertical Reaction at Bearing 1, Centre Crankshaft Bearing1 Gap from CrankPinCentre, Length of Crank Pin & Thickness of Crank Web 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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