6533b7d4fe1ef96bd1261c89
RESEARCH PRODUCT
Comparison of Variance and Damage Indicator Methods for Prediction of the Fracture Plane Orientation in Multiaxial Fatigue
W. BędkowskiJean-louis RobertE. MachaBastien Webersubject
Stress (mechanics)Equivalent stressVariance methodAmplitudeMaterials scienceShear (geology)business.industryStructural engineeringFracture planeLinear combinationbusinessStress intensity factordescription
ABSTRACT Two methods that enable prediction of the fracture plane orientation are presented and compared in this paper. The first one is a statistical approach, which is based on the variance of an equivalent stress. It is assumed that the fracture plane is the one where the variance of a linear combination of the shear and normal stresses acting on this plane is maximum. The second one uses the so-called damage indicator of a multiaxial fatigue criterion, which is based on the research of the critical plane. The formulation of the criterion involves shear and normal stress amplitudes and mean normal stress. The fracture plane is the critical plane; That is to say the one where the damage indicator is the highest. A comparison of the two methods against experimental results is made for biaxial cyclic and random stress states.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1999-01-01 |