Patent ID: 8082114
Filing Date: 2011-12-20
Classification: G01N

Abstract:
1. A method for characterizing a fatigue strength of a part on a basis of the part's surface state, the method comprising: measuring, by a measuring device, geometric features which indicate a surface profile of a zone in which the fatigue strength of the part is to be determined, the surface profile indicating respective depths and dimensions of surface features across the zone of the part; recording, in a memory, geometric features which indicate the surface profile of the part that is acquired by the measuring device; applying, by a calculation unit including a processor, the geometric features to a calculation model so as to formulate an estimate of a mechanical stress field in the zone of the part, the mechanical stress field is estimated directly from the acquired surface profile without determining geometrical coefficients; and determining, in the calculation unit, from the estimate of the mechanical stress field at least one quantity characteristic of a fatigue behavior of the part.