| 摘要 |
A method is provided for performing fatigue evaluation of a fatigue prone location of a tangible structure by converting multi-axial loading data of the fatigue prone location of the tangible structure to a set of equivalent constant amplitude loading data for the tangible structure. According to the method, a multi-axial load locus representing the tangible structure is generated. Time-dependent interior turning points R and any corresponding projected turning point R* art identified along the loading path from the point of origin P to the point of termination Q. Half cycles in the loading path are counted by referring to the interior and projected turning points R, R* along the loading path and to the point of origin P and the point of termination Q on the load locus. A stress range &Dgr;&sgr;e, loading path length L, and virtual path length for each of the counted half cycles are determined. Additional stress ranges &Dgr;&sgr;e, loading path lengths L, and virtual path lengths are determined recursively for half cycles counted in additional loading paths on the load locus. A system is also provided for performing fatigue evaluation. Methods are also provided for counting and displaying the number of load cycles represented in multi-axial loading data of a fatigue prone location of the tangible structure. Additional embodiments are disclosed and claimed. |
