Patent ID: 8155940
Filing Date: 2012-04-10
Classification: G06F

Abstract:
1. A computer-implemented method of predicting very high cycle fatigue strength for a cast aluminum-based metal alloy, said method comprising: providing a computer-based system comprising an input, an output, a central processing unit and memory; introducing program code into at least one of said input, memory and central processing unit from a computer-readable medium having a non-transitory form of said program code embodied therein; operating said program code such that calculations made thereby are performed by said central processing unit; selecting an alloy where at least one fatigue crack initiation site is presumed or determined to be present therein and where said alloy is generally not possessive of an identifiable endurance limit; inputting into said system a size of discontinuity or microstructure constituent representative of said at least one fatigue crack initiation site; inputting into said system a finite life fatigue strength that corresponds to said alloy; and calculating with said program code an infinite life fatigue strength and said very high cycle fatigue strength using a modified random fatigue limit model which comprises using the equation where a