A plasticity-corrected stress intensity factor for fatigue crack growth in ductile materials under cyclic compression |
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| Affiliation: | 1. Industrial Technology Center of Saga, 114 Yae-mizo, Nabeshima-machi, Saga 849-0932, Japan;2. Department of Mechanical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan;3. Research Center for Hydrogen Industrial Use and Storage (HYDROGENIUS), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan;4. Kobe Material Testing Laboratory Company Limited, 47-13 Niijima, Harima-cho, Kako-gun, Hyogo 675-0155, Japan;1. George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, 771 Ferst Drive, N.W., Atlanta, GA 30332, USA;2. School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, N.W., Atlanta, GA 30332, USA;1. Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, PR China;2. State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang, 050043, China;1. Department of Civil-Environmental Engineering and Architecture, University of Parma, Parco Area delle Scienze 181/A, I 43124 Parma, Italy;2. Department of Industrial Engineering, University of Parma, Parco Area delle Scienze 181/A, I 43124 Parma, Italy;3. Construction Technologies Institute - Italian National Research Council (ITC-CNR), Via Lombardia 49, I 20098 San Giuliano Milanese, Milano, Italy |
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| Abstract: | For prediction of the fatigue crack growth (FCG) behavior under cyclic compression, a plasticity-corrected stress intensity factor (PC-SIF) range ΔKpc is proposed on the basis of plastic zone toughening theory. The FCG behaviors in cyclic compression, and the effects of load ratio, preloading and mean load, are well predicted by this new mechanical driving force parameter. Comparisons with experimental data showed that the proposed PC-SIF range ΔKpc is an effective single mechanical parameter capable of describing the FCG behavior under different cyclic compressive loading conditions. |
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| Keywords: | Fatigue crack growth Plastic zone Stress intensity factor Cyclic compression |
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