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Extension Spring Calculator

Engineering Calculators | Extension Spring Equations

This calculator will calculate any of the values remaining by changing one of the variables then selecting the "calculate: button for the selected variable.

About Extension Spring Design: Most extension springs are wound with an initial tension.  This tension is the force that holds teh spring coils wound together.   The spring rate tends to be constant over the central 60 percent of the deflection range.  When designing for a particular spring, design for critical loads and rates to be within the central 60% deflection and load range. Standard and custom springs are available.  Exceeding manufactures maximum deflection almost always reduces usable spring life cycles.

Spring Initial Tension
(lbf)  Wound (TI)

 Spring Deflection
(in.)

Spring Constant (lbf/in)  K

Spring Tension Force
(lbf)  F

Solid Rectangular Beams Deflection Calculation
 
Length (Inches)
Width (Inches)
Height (Inches)
Force (Pounds)
Material
 
Deflection = (Inches)
Bending Stress = (PSI)
Formula:

MI for solid rectangle = ((Height3 * Width) / 12)
Deflection = (Length3 * Force) / (3 * E * MI)
Bending Stress = (Force * Length) / (MI / (0.5 * Height))


Where,
MI = Moment of Inertia
E = Modulas of Elasticity in psi

Calculation of Solid Rectangular Beam Deflection is made easier. Free Online Mechanical Engineering Calculators.
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