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Method for non-destructive determination of fatigue limits and fracture toughness in components of various shapes

  • US 5,767,415 A
  • Filed: 06/25/1996
  • Issued: 06/16/1998
  • Est. Priority Date: 06/25/1996
  • Status: Expired due to Fees
First Claim
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1. A non-destructive method of determining a flexural fatigue limit for a component, the method comprising the steps of:

  • (a) measuring a micro-plastic deformation corresponding to each of a plurality of different known values of torsional stress applied to the component;

    (b) identifying a critical value of stress corresponding to a change in the relationship between stress and micro-plastic deformation; and

    (c) multiplying said critical value of stress by a torsional-to-flexural conversion coefficient.

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