In order to guarantee a fatigue lifetime with a conventional and low probability of failure, a probabilistic fatigue assessment diagram is proposed as a tool. The safe domain is limited by the fatigue failure assessment curve, which depends on material properties through Basquin’s exponent and the endurance limit of the material. From the double-truncated dis- tribution of the targeted maximum applied stress, it is possible to find the failure probability and its associated safety factor. An example of an aeronautical component made of TA6V ti- tanium alloy welded by laser and exhibiting an undercut at the weld toe is given.

A PROBABILISTIC FATIGUE ASSESSMENT DIAGRAM TO GET A GUARANTEED LIFETIME WITH A LOW PROBABILITY OF FAILURE

CASAVOLA, Caterina;PAPPALETTERE, Carmine;
2016-01-01

Abstract

In order to guarantee a fatigue lifetime with a conventional and low probability of failure, a probabilistic fatigue assessment diagram is proposed as a tool. The safe domain is limited by the fatigue failure assessment curve, which depends on material properties through Basquin’s exponent and the endurance limit of the material. From the double-truncated dis- tribution of the targeted maximum applied stress, it is possible to find the failure probability and its associated safety factor. An example of an aeronautical component made of TA6V ti- tanium alloy welded by laser and exhibiting an undercut at the weld toe is given.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/89430
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