Compression Spring EN 13906-1

Zhejiang Stellar Global Co., Ltd.

Compression Spring EN 13906-1 calculates basic quantities of a compression spring according to EN 13906-1 and performs static and dynamic check

USE:
  1. Insert data related to material and geometry
  2. Insert load data
  3. Spring static check, aimed to avoid plastic deformation > 2%
  4. Spring dynamic check, aimed to avoid fatigue failure

REMARKS:
Remarkable results are highlighted in yellow

MATERIAL
E [MPa] Modulus of elasticity  
G [MPa] Shear modulus of elasticity  
ρ [kg/dm3] Density  
Rm [MPa] Tensile Strength, ultimate  
τk0(τk1) [MPa] Torsional fatigue load limit (alternate)  
Kind of material  
GEOMETRY
D [mm] Mean diameter  
n Number of active coils  
d [mm] Wire diameter  
L0 [mm] Free length  
g [mm] Initial distance beetween coils  
Lc ~ [mm] Solid height  
λ "Slimness" ratio (L0/D)  
w Spring index (D/d)  
De [mm] Outer diameter  
R [N/mm] Stiffness  
FLc [N] Solid height load  
Fe [Hz] Resonant frequency  
RQ(s) [N/mm] Shear stiffness (approximate)  
INSTABILITY
ν Support quality ratio  
Fk [N] Instability ratio > No instability  
SOLID LENGTH CHECK  
τc zul [Mpa] Acceptable stress  
τspbl [Mpa] Solid heigth stress  
R [N/mm] Safety ratio  
Demax [mm] Maximum outer diameter at solid length  
LOAD DEFINITION
Define using:       
so [mm] Preload  
Fo [N] Preload  
Fmax [N] Maximum load  
Fmin [N] Minimum load  
Fmax Actual maximum load  
Fmin Actual minimum load  
smax [mm] Actual maximum deflection  
smin [mm] Actual minimum deflection  
Δs [mm] Stroke  
ξ(s) Relative deflection (smax/L0)  

Spring behaviour
Deflection (mm)
Legenda:
———
Load curve
▲
Minimum load
◆
Maximum load
●
Solid length


FATIGUE CHECK
Ks Curvature ratio
τmax [Mpa] Maximum torsional stress
τmin [Mpa] Minimum torsional stress
Kw Wahl correction factor
τk2 [Mpa] Maximum torsional stress (corrected)
τk1 = τkU [Mpa] Minimum torsional stress (corrected)
τkh [Mpa] Stress amplitude
Unlimited fatigue check


Fatigue check
τ minimum (Mpa)
Legenda:
———
Constant load
—▲—
Spring behaviour line
—◆—
Unlimited fatigue limit
  ●
Current value