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A MULTIAXIAL FATIGUE DAMAGE MODEL FOR ORTHOTROPIC MATERIALS UNDER PROPORTIONAL LOADING
Author(s) -
Lin Hong,
NayebHashemi H.,
Pelloux R. M.
Publication year - 1993
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.1993.tb00115.x
Subject(s) - orthotropic material , materials science , structural engineering , composite material , fatigue testing , principal stress , constant (computer programming) , principal axis theorem , finite element method , engineering , computer science , mathematics , geometry , shear stress , programming language
A new multiaxial fatigue damage model for orthotropic materials is proposed based on the strain vector. Six material constants are included in the model. These material constants represent the dependence of fatigue resistance on material orientation, and they can be obtained by conducting strain‐controlled uniaxial fatigue tests along the three principal orthotropic directions of an orthotropic material. The model can also be transformed in new coordinate systems to predict the fatigue lives of new material orientations. Biaxial low‐cycle fatigue tests are conducted to verify the model. The prediction of the model agrees with the experimental results reasonably well.