6533b7d7fe1ef96bd1268d49

RESEARCH PRODUCT

Fatigue fracture plane under Multiaxial Random Loadings - prediction by variance of equivalent stress based on the maximum shear and normal stresses

E. MachaW. Bȩdkowski

subject

Variance methodMaterials sciencebusiness.industryMechanical EngineeringStructural engineeringFracture planeCondensed Matter PhysicsComputer Science::RoboticsEquivalent stressShear (geology)Mechanics of MaterialsGeneral Materials SciencebusinessStress intensity factorStress concentration

description

It is assumed that the plane in which the maximum variance of the equivalent stress appears is critical for a material and the fatigue fracture should be expected in this plane. The equivalent stress is calculated according to the fatigue criterion of maximum shear and normal stresses in the fracture plane. It was demonstrated that for each stationary random stress state there is one or more critical planes where the fatigue fracture plane can be expected. The variance method together with the discussed fatigue criterion give good results for three analysed types of carbon steels under multiaxial cyclic loadings.

https://doi.org/10.1002/mawe.19920230305