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RESEARCH PRODUCT
Influence of correlations between stresses on calculated fatigue life of machine elements
Tadeusz ŁAgodasubject
EngineeringAggregate (composite)Covariance matrixbusiness.industryCauchy stress tensorMechanical EngineeringBiaxial tensile testStructural engineeringWeldingCovarianceIndustrial and Manufacturing Engineeringlaw.inventionStress (mechanics)Mechanics of MaterialslawModeling and SimulationGeneral Materials SciencebusinessVibration fatiguedescription
The correlation between components of the random stress tensor and its influence on the calculated fatigue life of machine elements were analysed. Three covariance matrices of components of biaxial stress state were considered. They were determined from measurements of strains in an element of a vibrating screen for aggregate, in the back wall of a bus, and in a welded element of excavator fittings. Calculations were made according to four criteria of multiaxial random fatigue. Cycles were counted with the rainflow method, and damage was cumulated with the Palmgren-Miner hypothesis. It was found that convariances of random stress state components strongly influence the calculated fatigue life.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1996-11-01 | International Journal of Fatigue |