NEN EN 13906-2 : 2013
Current
The latest, up-to-date edition.
CYLINDRICAL HELICAL SPRINGS MADE FROM ROUND WIRE AND BAR - CALCULATION AND DESIGN - PART 2: EXTENSION SPRINGS
12-01-2013
Foreword
1 Scope
2 Normative references
3 Terms and definitions, symbols, units and abbreviated terms
3.1 Terms and definitions
3.2 Symbols, units and abbreviated terms
4 Theoretical extension spring diagram
5 Types of loading
5.1 Static and/or quasi-static loading
5.2 Dynamic loading
6 Stress correction factor k
7 Initial tension force F[o]
8 Material property values for the calculation of springs
9 Calculation formulae
9.1 Spring work
9.2 Spring Force
9.3 Spring deflection
9.4 Spring rate
9.5 Torsional stresses
9.6 Nominal diameter of wire or bar
9.7 Number of active coils
9.8 Total number of coils
9.9 Initial tension force
10 Permissible torsional stress under static or quasi-static
loading
10.1 Permissible torsional stress Tau[zul] for cold coiled
springs
10.2 Permissible torsional stress Tau[zul] for hot coiled
springs
10.3 Initial tension torsional stress Tau[o]
11 Calculation of extension springs for dynamic loading
Annex A (informative) Types of spring ends
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