In this study, mixed-mode fatigue tests are conducted using surface-cracked specimens. Slant surface-cracked specimens are prepared with crack angles of 15 deg, 30 deg, 45 deg, and 60 deg. It is shown that a “factory roof” fracture is formed at the deepest point of the surface crack due to ΔKIII and causes the crack growth rate to decrease. Additionally, fatigue crack growth is simulated using the superposition finite element method (FEM) with crack growth criteria. It is shown that conventional crack growth criteria are not applicable to factory roof fractures. Finally, a modified criterion for the prediction of crack growth rate is proposed, fatigue crack growth simulation is conducted using this criterion, and the results are compared with experimental results.
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e-mail: wada@rs.suwa.tus.ac.jp
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October 2012
Research-Article
Effect of KIII on Fatigue Crack Growth Behavior
Yoshitaka Wada,
e-mail: wada@rs.suwa.tus.ac.jp
Yoshitaka Wada
Tokyo University of Science
,Suwa, 5000-1 Toyohira, Chino
,Nagano 391-0292
, Japan
e-mail: wada@rs.suwa.tus.ac.jp
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Chikako Ohdama
Chikako Ohdama
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Masanori Kikuchi
Yoshitaka Wada
Tokyo University of Science
,Suwa, 5000-1 Toyohira, Chino
,Nagano 391-0292
, Japan
e-mail: wada@rs.suwa.tus.ac.jp
Chikako Ohdama
Contributed by the Materials Division of ASME for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received September 5, 2011; final manuscript received June 14, 2012; published online August 24, 2012. Assoc. Editor: Jefferey Kysar.
J. Eng. Mater. Technol. Oct 2012, 134(4): 041009 (6 pages)
Published Online: August 24, 2012
Article history
Received:
September 5, 2011
Revision Received:
June 14, 2012
Citation
Kikuchi, M., Wada, Y., and Ohdama, C. (August 24, 2012). "Effect of KIII on Fatigue Crack Growth Behavior." ASME. J. Eng. Mater. Technol. October 2012; 134(4): 041009. https://doi.org/10.1115/1.4006978
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