Solid Edge Engineering Reference
Design And Calculation Report

Compression Spring

GENERAL INFORMATION
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Date Created: 2010/12/16 04:30:50 PM
Generated by: Dan
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STRENGTH VALIDATION: Pass

Standard: ISO

INPUT DESIGN CONDITIONS
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DESIGN INPUT PARAMETERS

SPRING DIMENSIONS
(d) Wire Diameter: 1.60 mm 
Active Coils: 4 
(Do) Outside Diameter: 17.00 mm 
(Lo) Unloaded Length: 32.00 mm 
(Lp) Length at Preload: 28.00 mm 
(Df) Required Deflection: 15.00 mm 

SPRING PARAMETERS
Select Assembly Dimensions Input: Length at Preload 
Safety Factor: 1 
Coil Direction: Left 
Coiling Process: Cold Coiled 
Spring Ends: Closed and Ground 

MATERIAL PROPERTIES USED FOR CALCULATIONS
Material: Stainless Steel Wire - Grade 3 
Modulus of Rigidity: 71000 MPa
Density: 7800 Kg/m^3

MATERIAL PROPERTIES APPLIED TO THE MODEL

DESIGN INPUT OPTIONS
Loading Type: Based on Static Loading 
Buckle check for Guided Mounting: Yes 
Design Criteria: Find Loads for given Spring Parameters 
Diameter Selection: Specify Outer Diameter 
Spring Dimensions: Find Spring Index based on Wire and Spring Diameter 
Dimension Limits: Not applicable 
Diameter Constraints: Not applicable 
Deflection Constraints: Not applicable 


CALCULATE RESULTS
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OUTPUT DESIGN PARAMETERS
Spring Index: 9.625 
(Dm) Mean Diameter: 15.40 mm 
(Di) Inside Diameter: 13.80 mm 
(Lf) Length at Applied Load: 13.00 mm 
(Fp) Preload: 15925.245 mN 
(Ff) Applied Load: 75644.915 mN 

STRENGTH VALIDATION
(P) Pitch of Unloaded Spring: 7.60 mm 
Deflection at Preload: 4.00 mm 
Total Deflection: 19.00 mm 
Spring Constant: 3.981 
Wahl's Stress Factor: 1.151 
Shear Stress at Preload: 175471.557 kPa 
Shear Stress at Applied Load: 833489.896 kPa 
Tensile Strength: 1720000.000 kPa 
Permissible Shear Stress: 860000.000 kPa 
(Ls) Solid Length: 12.43 mm 
Space between Active Coils: 6.00 mm 
Buckle Check - Guide Required ?: No 


END OF REPORT