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Example calculation

Stiffness and strength of a spring ring washer

calculated after the thin plates theory

This calculation is only a simplified estimation, and does not replace a detailed design calculation.

Input data

 Outside diameter of washer  mm
 Inside diameter of washer  mm
 Washer thickness  mm
 Elastic modulus of washer  MPa
 Poisson's ratio   
 Axial force  kN
 Bolt diameter  mm
 Bolt length  mm
 Elastic modulus of bolt  MPa


 Spring washer stiffness  kN/mm
 Maximum stress in the washer  MPa
 Fictitious elastic modulus of bolt:
     one spring washer per bolt  MPa
     two spring washers per bolt  MPa
© Lau Engineering Solutions GmbH