Patent ID: 7454297
Filing Date: 2008-11-18
Classification: G07C

Abstract:
1. A method for determining the remaining fatigue life of a component that experiences a cyclic stress/strain, comprising: monitoring stress/strain of said component and generating a plurality of stress/strain amplitude range values over a plurality of full stress/strain cycles and half stress strain cycles affecting said component; using a clock and generating said full and half stress/stain cycles for each clock cycle of the clock; processing the stress/strain amplitude range values together with known fatigue information regarding said component to determine fractions of fatigue life of said component expended as a result of each said full stress/strain cycle and each said half stress/strain cycle; and using said fractions of fatigue life of said component that have been expended during said full and half stress/strain cycles to maintain a record of remaining fatigue life of said component.