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Bending Stress in Crankweb is the bending stress in the crank web due to the bending moment acting onto the crank web. Check FAQs
σw=6Rv1(b1-lc2-t2)wt2
σw - Bending Stress in Crankweb?Rv1 - Vertical Reaction at Bearing 1?b1 - Centre Crankshaft Bearing1 Gap from CrankPinCentre?lc - Length of Crank Pin?t - Thickness of Crank Web?w - Width of Crank Web?

Bending stress at central plane of crank web of centre crankshaft at TDC position Example

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Here is how the Bending stress at central plane of crank web of centre crankshaft at TDC position equation looks like with Values.

Here is how the Bending stress at central plane of crank web of centre crankshaft at TDC position equation looks like with Units.

Here is how the Bending stress at central plane of crank web of centre crankshaft at TDC position equation looks like.

30.0094Edit=610725Edit(90Edit-43Edit2-40Edit2)65Edit40Edit2
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Bending stress at central plane of crank web of centre crankshaft at TDC position Solution

Follow our step by step solution on how to calculate Bending stress at central plane of crank web of centre crankshaft at TDC position?

FIRST Step Consider the formula
σw=6Rv1(b1-lc2-t2)wt2
Next Step Substitute values of Variables
σw=610725N(90mm-43mm2-40mm2)65mm40mm2
Next Step Convert Units
σw=610725N(0.09m-0.043m2-0.04m2)0.065m0.04m2
Next Step Prepare to Evaluate
σw=610725(0.09-0.0432-0.042)0.0650.042
Next Step Evaluate
σw=30009375Pa
Next Step Convert to Output's Unit
σw=30.009375N/mm²
LAST Step Rounding Answer
σw=30.0094N/mm²

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

Variables
Bending Stress in Crankweb
Bending Stress in Crankweb is the bending stress in the crank web due to the bending moment acting onto the crank web.
Symbol: σw
Measurement: StressUnit: N/mm²
Note: Value should be greater than 0.
Vertical Reaction at Bearing 1
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.
Symbol: Rv1
Measurement: ForceUnit: N
Note: Value should be greater than 0.
Centre Crankshaft Bearing1 Gap from CrankPinCentre
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.
Symbol: b1
Measurement: LengthUnit: mm
Note: Value should be greater than 0.
Length of 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.
Symbol: lc
Measurement: LengthUnit: mm
Note: Value should be greater than 0.
Thickness of Crank Web
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.
Symbol: t
Measurement: LengthUnit: mm
Note: Value should be greater than 0.
Width of Crank Web
Width of Crank Web is defined as the width of the crank web (the portion of a crank between the crankpin and the shaft) measured perpendicular to the crankpin longitudinal axis.
Symbol: w
Measurement: LengthUnit: mm
Note: Value should be greater than 0.

Other Formulas to find Bending Stress in Crankweb

​Go Maximum Bending stress in crank web of centre crankshaft at TDC position given bending moment
σw=Mb6wt2

Other formulas in Design of Crank Web at Top Dead Centre Position category

​Go Width of crank web of centre crankshaft at TDC position given diameter of crank pin
w=1.14dc
​Go Thickness of crank web of centre crankshaft at TDC position given diameter of crank pin
t=0.7dc
​Go Direct compressive stress in central plane of crank web of centre crankshaft at TDC position
σc=Rv1wt
​Go Width of crank web of centre crankshaft at TDC position given compressive stress
w=Rv1σct

How to Evaluate Bending stress at central plane of crank web of centre crankshaft at TDC position?

Bending stress at central plane of crank web of centre crankshaft at TDC position evaluator uses Bending Stress in Crankweb = (6*Vertical Reaction at Bearing 1*(Centre Crankshaft Bearing1 Gap from CrankPinCentre-Length of Crank Pin/2-Thickness of Crank Web/2))/(Width of Crank Web*Thickness of Crank Web^2) to evaluate the Bending Stress in Crankweb, Bending stress at central plane of crank web of centre crankshaft at TDC position is the amount of bending stress generated into the central plane of the crank web, designed for when the crank is at the top dead center position and subjected to maximum bending moment and no torsional moment. Bending Stress in Crankweb is denoted by σw symbol.

How to evaluate Bending stress at central plane of crank web of centre crankshaft at TDC position using this online evaluator? To use this online evaluator for Bending stress at central plane of crank web of centre crankshaft at TDC position, enter Vertical Reaction at Bearing 1 (Rv1), Centre Crankshaft Bearing1 Gap from CrankPinCentre (b1), Length of Crank Pin (lc), Thickness of Crank Web (t) & Width of Crank Web (w) and hit the calculate button.

FAQs on Bending stress at central plane of crank web of centre crankshaft at TDC position

What is the formula to find Bending stress at central plane of crank web of centre crankshaft at TDC position?
The formula of Bending stress at central plane of crank web of centre crankshaft at TDC position is expressed as Bending Stress in Crankweb = (6*Vertical Reaction at Bearing 1*(Centre Crankshaft Bearing1 Gap from CrankPinCentre-Length of Crank Pin/2-Thickness of Crank Web/2))/(Width of Crank Web*Thickness of Crank Web^2). Here is an example- 3E-5 = (6*10725*(0.09-0.043/2-0.04/2))/(0.065*0.04^2).
How to calculate Bending stress at central plane of crank web of centre crankshaft at TDC position?
With Vertical Reaction at Bearing 1 (Rv1), Centre Crankshaft Bearing1 Gap from CrankPinCentre (b1), Length of Crank Pin (lc), Thickness of Crank Web (t) & Width of Crank Web (w) we can find Bending stress at central plane of crank web of centre crankshaft at TDC position using the formula - Bending Stress in Crankweb = (6*Vertical Reaction at Bearing 1*(Centre Crankshaft Bearing1 Gap from CrankPinCentre-Length of Crank Pin/2-Thickness of Crank Web/2))/(Width of Crank Web*Thickness of Crank Web^2).
What are the other ways to Calculate Bending Stress in Crankweb?
Here are the different ways to Calculate Bending Stress in Crankweb-
  • Bending Stress in Crankweb=(Bending Moment at Central Plane of Crank Web*6)/(Width of Crank Web*Thickness of Crank Web^2)OpenImg
Can the Bending stress at central plane of crank web of centre crankshaft at TDC position be negative?
No, the Bending stress at central plane of crank web of centre crankshaft at TDC position, measured in Stress cannot be negative.
Which unit is used to measure Bending stress at central plane of crank web of centre crankshaft at TDC position?
Bending stress at central plane of crank web of centre crankshaft at TDC position is usually measured using the Newton per Square Millimeter[N/mm²] for Stress. Pascal[N/mm²], Newton per Square Meter[N/mm²], Kilonewton per Square Meter[N/mm²] are the few other units in which Bending stress at central plane of crank web of centre crankshaft at TDC position can be measured.
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