Mode II fatigue crack growth behavior and mode II fracture toughness of 7050 aluminium alloy in two orientations

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2013

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Yurtoğlu, M. Ender

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Fatigue crack growth behavior of AA7050 T7451 aluminum alloy under mode II loading condition in two orientations was investigated. Compact shear specimens were prepared in TL and LT directions. A loading frame for mode II type of loading was manufactured. Using the loading frame and the specimen, KIIC values and mode II fatigue crack growth rates were calculated. Fractographic analysis of the fracture surfaces of both mode II fracture toughness test specimens and mode II fatigue crack growth test specimens were done to examine the effects of mode II load. KIIC values were measured between 1.3 and 1.5 times the KIC values for this alloy. As for mode II fatigue crack growth rates, TL orientation shows the highest mode II fatigue crack growth resistance.

Subject Keywords

Fracture mechanics., Deformations (Mechanics)., Strains and stresses., Shear (Mechanics)., Aluminum alloys.

URI

http://etd.lib.metu.edu.tr/upload/12615581/index.pdf
https://hdl.handle.net/11511/22323

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

M. E. Yurtoğlu, “Mode II fatigue crack growth behavior and mode II fracture toughness of 7050 aluminium alloy in two orientations,” M.S. - Master of Science, Middle East Technical University, 2013.