Spring Index of Engine Valve Spring given Shear Stress, Maximum Force and Wire Diameter Formula

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Spring Index for Valve Spring is the ratio of the mean coil diameter of the spring to the diameter of the spring Wire. Check FAQs
C=πfsdw28KP
C - Spring Index for Valve Spring?fs - Shear Stress in Valve Spring?dw - Wire Diameter of Valve Spring?K - Wahl Factor of Valve Spring?P - Axial Force on Valve Spring?π - Archimedes' constant?

Spring Index of Engine Valve Spring given Shear Stress, Maximum Force and Wire Diameter Example

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With units
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Here is how the Spring Index of Engine Valve Spring given Shear Stress, Maximum Force and Wire Diameter equation looks like with Values.

Here is how the Spring Index of Engine Valve Spring given Shear Stress, Maximum Force and Wire Diameter equation looks like with Units.

Here is how the Spring Index of Engine Valve Spring given Shear Stress, Maximum Force and Wire Diameter equation looks like.

8.7347Edit=3.1416300Edit5.5Edit281.2Edit340Edit

Spring Index of Engine Valve Spring given Shear Stress, Maximum Force and Wire Diameter Solution

Follow our step by step solution on how to calculate Spring Index of Engine Valve Spring given Shear Stress, Maximum Force and Wire Diameter?

FIRST Step Consider the formula
C=πfsdw28KP
Next Step Substitute values of Variables
C=π300N/mm²5.5mm281.2340N
Next Step Substitute values of Constants
C=3.1416300N/mm²5.5mm281.2340N
Next Step Convert Units
C=3.14163E+8Pa0.0055m281.2340N
Next Step Prepare to Evaluate
C=3.14163E+80.0055281.2340
Next Step Evaluate
C=8.73466707454883
LAST Step Rounding Answer
C=8.7347

Spring Index of Engine Valve Spring given Shear Stress, Maximum Force and Wire Diameter Formula Elements

Variables
Constants
Spring Index for Valve Spring
Spring Index for Valve Spring is the ratio of the mean coil diameter of the spring to the diameter of the spring Wire.
Symbol: C
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Shear Stress in Valve Spring
Shear Stress in Valve Spring is the stress induced into the spring due to its compression and expansion.
Symbol: fs
Measurement: StressUnit: N/mm²
Note: Value should be greater than 0.
Wire Diameter of Valve Spring
Wire Diameter of Valve Spring is the diameter of the wire of a valve spring, which constitutes the coils of the spring.
Symbol: dw
Measurement: LengthUnit: mm
Note: Value should be greater than 0.
Wahl Factor of Valve Spring
Wahl Factor of Valve Spring is a stress factor used in order to take into account the effect of direct shear and change in coil curvature.
Symbol: K
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Axial Force on Valve Spring
Axial Force on Valve Spring is the force acting at the ends of spring trying to compress or expand it in the axial direction.
Symbol: P
Measurement: ForceUnit: N
Note: Value should be greater than 0.
Archimedes' constant
Archimedes' constant is a mathematical constant that represents the ratio of the circumference of a circle to its diameter.
Symbol: π
Value: 3.14159265358979323846264338327950288

Other formulas in Valve Spring category

​Go Diameter of Wire of Engine Valve Spring given Mean Coil Diameter
dw=D8
​Go Diameter of Wire of Engine Valve Spring given Torsional Shear Stress in Wire
dw=8KPCπfs
​Go Diameter of Wire of Engine Valve Spring
dw=8K((Pi+khmax)C)πfs
​Go Wahl Factor for Engine Valve Spring given Spring Index
K=πfsdw28C(Pi+khmax)

How to Evaluate Spring Index of Engine Valve Spring given Shear Stress, Maximum Force and Wire Diameter?

Spring Index of Engine Valve Spring given Shear Stress, Maximum Force and Wire Diameter evaluator uses Spring Index for Valve Spring = (pi*Shear Stress in Valve Spring*Wire Diameter of Valve Spring^2)/(8*Wahl Factor of Valve Spring*Axial Force on Valve Spring) to evaluate the Spring Index for Valve Spring, The Spring Index of engine valve spring given shear stress, maximum force and wire diameter is defined as the ratio of the mean coil diameter of the engine valve spring to the diameter of the spring wire. Spring Index for Valve Spring is denoted by C symbol.

How to evaluate Spring Index of Engine Valve Spring given Shear Stress, Maximum Force and Wire Diameter using this online evaluator? To use this online evaluator for Spring Index of Engine Valve Spring given Shear Stress, Maximum Force and Wire Diameter, enter Shear Stress in Valve Spring (fs), Wire Diameter of Valve Spring (dw), Wahl Factor of Valve Spring (K) & Axial Force on Valve Spring (P) and hit the calculate button.

FAQs on Spring Index of Engine Valve Spring given Shear Stress, Maximum Force and Wire Diameter

What is the formula to find Spring Index of Engine Valve Spring given Shear Stress, Maximum Force and Wire Diameter?
The formula of Spring Index of Engine Valve Spring given Shear Stress, Maximum Force and Wire Diameter is expressed as Spring Index for Valve Spring = (pi*Shear Stress in Valve Spring*Wire Diameter of Valve Spring^2)/(8*Wahl Factor of Valve Spring*Axial Force on Valve Spring). Here is an example- 8.734667 = (pi*300000000*0.0055^2)/(8*1.2*340).
How to calculate Spring Index of Engine Valve Spring given Shear Stress, Maximum Force and Wire Diameter?
With Shear Stress in Valve Spring (fs), Wire Diameter of Valve Spring (dw), Wahl Factor of Valve Spring (K) & Axial Force on Valve Spring (P) we can find Spring Index of Engine Valve Spring given Shear Stress, Maximum Force and Wire Diameter using the formula - Spring Index for Valve Spring = (pi*Shear Stress in Valve Spring*Wire Diameter of Valve Spring^2)/(8*Wahl Factor of Valve Spring*Axial Force on Valve Spring). This formula also uses Archimedes' constant .
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