TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

A New Multiaxial Fatigue Testing Method for Variable-Amplitude Loading and Stress Ratio

[+] Author and Article Information
Tommy J. George, M.-H. Herman Shen

Department of Aerospace Engineering and Aviation, The Ohio State University, Columbus, OH 43210

Theodore Nicholas, Charles J. Cross

Air Force Research Laboratory, Wright-Patterson AFB, OH 45433

J. Eng. Gas Turbines Power 128(4), 857-864 (Sep 18, 2006) (8 pages) doi:10.1115/1.1788687 History: Received October 01, 2002; Revised March 01, 2003; Online September 18, 2006
Copyright © 2006 by ASME
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Typical Goodman (or Haigh) diagram for Ti-6Al-4V for 107 cycles 3
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Biaxial specimen Winger3 dimensions
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FEM results for Alumwinger3 (0.125-in. thick 6061-T6)
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Microphotographs of microcracks in a 6061-T6 biaxial specimen
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Maximum load y-direction total strain
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Postyield y-direction total strain
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Postyield y-direction stress
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Postyield y-direction elastic strain
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Postyield y-direction plastic strain
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Diagram of strain gage placement
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Load–strain history for 6061-T6 specimen 2
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Total, elastic, plastic strains and residual stress
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Goodman diagram for 6061-T6 for 106 cycles from vibration-based test data
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FEM results for square steel plate geometry
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Photograph of cracked biaxial specimen Alumwinger3




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