This article reviews micromechanical models developed for fatigue cracking in fiber reinforced metal matrix composites under mechanical and thermal loads. Emphases is placed on the formulae and design charts that can quantify the fatigue crack growth and fiber fracture. The composite is taken to be linear elastic, with unidirectional aligned fibers. Interfacial debonding is assumed to occur readily, allowing fibers to slide relative to the matrix resisted by a uniform shear stress. The fibers therefore bridge any matrix crack which develops. The crack bridging traction law includes the effect of thermal expansion mismatch between the fiber and the matrix and a temperature dependence of the frictional shear stress. Predictions are made of the crack tip stress intensities, matrix fatigue crack growth and maximum fiber stresses under mechanical or thermomechanical loads. For composites under thermomechanical load, both in-phase and out-of-phase fatigue are modeled. The implications for life prediction for fiber reinforced metal matrix composites are discussed.
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ASME 1995 International Gas Turbine and Aeroengine Congress and Exposition
June 5–8, 1995
Houston, Texas, USA
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-7882-8
Article Contents
PROCEEDINGS PAPER
Fatigue Cracking in Fiber-Reinforced Metal Matrix Composites Under Mechanical and Thermal Loads Free
G. Bao,
G. Bao
The Johns Hopkins University, Baltimore, MD
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R. M. McMeeking
R. M. McMeeking
University of California, Santa Barbara, CA
Search for other works by this author on:
G. Bao
The Johns Hopkins University, Baltimore, MD
R. M. McMeeking
University of California, Santa Barbara, CA
Paper No:
95-GT-315, V005T14A027; 31 pages
Published Online:
February 16, 2015
Citation
Bao, G, & McMeeking, RM. "Fatigue Cracking in Fiber-Reinforced Metal Matrix Composites Under Mechanical and Thermal Loads." Proceedings of the ASME 1995 International Gas Turbine and Aeroengine Congress and Exposition. Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award. Houston, Texas, USA. June 5–8, 1995. V005T14A027. ASME. https://doi.org/10.1115/95-GT-315
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