SEDL / STP / STP1263-EB / STP16456S

Analysis of the Thermo-Mechanical Fatigue Response of Metal Matrix Composite Laminates with Interfacial Normal and Shear Failure

Robertson, DD
Assistant Professor and Professor & Head, Air Force Institute of Technology, Wright-Patterson AFB, OH

Mall, S
Assistant Professor and Professor & Head, Air Force Institute of Technology, Wright-Patterson AFB, OH

Pages: 16    Published: Jan 1996

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Abstract

In this study, an analysis of the thermo-mechanical fatigue (TMF) behavior of titanium-based metal matrix composites (MMCs) is accomplished by employing a modified method of cells micromechanics model coupled with a fiber/matrix interfacial failure scheme and the Bodner-Partom unified constitutive theory. Interfacial failure is based on a probabilistic failure criterion which considers the equivalent interfacial compliance to be a function of the interfacial stress. In this approach, the effects of both normal and shear failure of the interface have been included. MMC laminates with angle-ply and quasi-isotropic layups are analyzed for monotonic, cyclic, and thermo-mechanical fatigue loads, and where it is appropriate, comparisons with experimental data are made.