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Bending Moment at Bearing1 of Crankshaft is the moment acting on the 1st bearing of the crankshaft which tends to bend it when a force acts on it. Check FAQs
Mb=Pp⋅((0.75⋅lc)+(t)+(0.5⋅l1))
Mb - Bending Moment at Bearing1 of Crankshaft?Pp - Force on Crank Pin?lc - Length of Crank Pin?t - Thickness of Crank Web?l1 - Length of Bearing1 of Crankshaft?

Bending moment at bearing 1 of side crankshaft at TDC position Example

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Here is how the Bending moment at bearing 1 of side crankshaft at TDC position equation looks like with Values.

Here is how the Bending moment at bearing 1 of side crankshaft at TDC position equation looks like with Units.

Here is how the Bending moment at bearing 1 of side crankshaft at TDC position equation looks like.

649999.9837Edit=1950Edit⋅((0.75⋅381.1111Edit)+(40Edit)+(0.5⋅15Edit))
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Bending moment at bearing 1 of side crankshaft at TDC position Solution

Follow our step by step solution on how to calculate Bending moment at bearing 1 of side crankshaft at TDC position?

FIRST Step Consider the formula
Mb=Pp⋅((0.75⋅lc)+(t)+(0.5⋅l1))
Next Step Substitute values of Variables
∴ Mb=1950N⋅((0.75⋅381.1111mm)+(40mm)+(0.5⋅15mm))
Next Step Convert Units
∴ Mb=1950N⋅((0.75⋅0.3811m)+(0.04m)+(0.5⋅0.015m))
Next Step Prepare to Evaluate
∴ Mb=1950⋅((0.75⋅0.3811)+(0.04)+(0.5⋅0.015))
Next Step Evaluate
∴Mb=649.99998375N*m
Next Step Convert to Output's Unit
∴Mb=649999.98375N*mm
LAST Step Rounding Answer
∴Mb=649999.9837N*mm

Bending moment at bearing 1 of side crankshaft at TDC position Formula Elements

Variables
Bending Moment at Bearing1 of Crankshaft
Bending Moment at Bearing1 of Crankshaft is the moment acting on the 1st bearing of the crankshaft which tends to bend it when a force acts on it.
Symbol: Mb
Measurement: TorqueUnit: N*mm
Note: Value should be greater than 0.
Formulas to find Bending Moment at Bearing1 of CrankshaftOpen Variable
Force on Crank Pin
Force on Crank Pin is the force acting onto the crankpin used in the assembly of the crank, and the connecting rod.
Symbol: Pp
Measurement: ForceUnit: N
Note: Value should be greater than 0.
Formulas to find Force on Crank PinOpen Variable
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.
Formulas to find Length of Crank PinOpen Variable
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.
Formulas to find Thickness of Crank WebOpen Variable
Length of Bearing1 of Crankshaft
Length of Bearing1 of Crankshaft is the length of the 1st bearing of a crankshaft and this bearing supports the crankshaft.
Symbol: l1
Measurement: LengthUnit: mm
Note: Value should be greater than 0.
Formulas to find Length of Bearing1 of CrankshaftOpen Variable

Other Formulas to find Bending Moment at Bearing1 of Crankshaft

​Go Bending moment in shaft at bearing1 of side crankshaft at TDC position
Mb=σb⋅π⋅d1332

Other formulas in Design of Bearing at Top Dead Centre Position category

​Go Overhang Distance of piston force from Bearing 1 of side crankshaft at TDC position
b=Rv⋅cPp
​Go Length of Bearing 1 of Side Crankshaft at TDC Position given Bending Moment at Bearing
l1=(MbPp)-(0.75⋅lc)-(t)0.5
​Go Minimum thickness of crankweb given crankpin diameter
tmin=0.45⋅dcp
​Go Maximum thickness of crankweb given crankpin diameter
tpin=0.75⋅dcp

How to Evaluate Bending moment at bearing 1 of side crankshaft at TDC position?

Bending moment at bearing 1 of side crankshaft at TDC position evaluator uses Bending Moment at Bearing1 of Crankshaft = Force on Crank Pin*((0.75*Length of Crank Pin)+(Thickness of Crank Web)+(0.5*Length of Bearing1 of Crankshaft)) to evaluate the Bending Moment at Bearing1 of Crankshaft, The bending moment at bearing 1 of side crankshaft at TDC position is the bending moment in the 1st bearing of the side crankshaft at the TDC position, due to the reaction forces acting on this bearing. Bending Moment at Bearing1 of Crankshaft is denoted by Mb symbol.

How to evaluate Bending moment at bearing 1 of side crankshaft at TDC position using this online evaluator? To use this online evaluator for Bending moment at bearing 1 of side crankshaft at TDC position, enter Force on Crank Pin (Pp), Length of Crank Pin (lc), Thickness of Crank Web (t) & Length of Bearing1 of Crankshaft (l1) and hit the calculate button.

FAQs on Bending moment at bearing 1 of side crankshaft at TDC position

What is the formula to find Bending moment at bearing 1 of side crankshaft at TDC position?
The formula of Bending moment at bearing 1 of side crankshaft at TDC position is expressed as Bending Moment at Bearing1 of Crankshaft = Force on Crank Pin*((0.75*Length of Crank Pin)+(Thickness of Crank Web)+(0.5*Length of Bearing1 of Crankshaft)). Here is an example- 6.5E+8 = 1950*((0.75*0.3811111)+(0.04)+(0.5*0.015)).
How to calculate Bending moment at bearing 1 of side crankshaft at TDC position?
With Force on Crank Pin (Pp), Length of Crank Pin (lc), Thickness of Crank Web (t) & Length of Bearing1 of Crankshaft (l1) we can find Bending moment at bearing 1 of side crankshaft at TDC position using the formula - Bending Moment at Bearing1 of Crankshaft = Force on Crank Pin*((0.75*Length of Crank Pin)+(Thickness of Crank Web)+(0.5*Length of Bearing1 of Crankshaft)).
What are the other ways to Calculate Bending Moment at Bearing1 of Crankshaft?
Here are the different ways to Calculate Bending Moment at Bearing1 of Crankshaft-
  • Bending Moment at Bearing1 of Crankshaft=(Bending Stress at Bearing1 of Crankshaft*pi*Diameter of Journal or Shaft at Bearing 1^3)/32OpenImg
Can the Bending moment at bearing 1 of side crankshaft at TDC position be negative?
No, the Bending moment at bearing 1 of side crankshaft at TDC position, measured in Torque cannot be negative.
Which unit is used to measure Bending moment at bearing 1 of side crankshaft at TDC position?
Bending moment at bearing 1 of side crankshaft at TDC position is usually measured using the Newton Millimeter[N*mm] for Torque. Newton Meter[N*mm], Newton Centimeter[N*mm], Kilonewton Meter[N*mm] are the few other units in which Bending moment at bearing 1 of side crankshaft at TDC position can be measured.
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