Effects of Mixed Mode Loading Conditions on Fatigue Crack Growth Rate

Abstract:

The fatigue crack growth rate is the most important factor in predicting the life of a product when applying the damage tolerance design concept. Studies related to pure mode I for structures under fatigue loading have been actively conducted, while not many studies are conducted on the mixed mode. In this study, therefore, mixed mode fatigue crack growth experiments were designed using the Compact-Tension-Shear (CTS) specimens and the loading devices, proposed by Richard. Furthermore, the finite element analysis was used in determining the stress intensity factors of CTS specimen. As the results, the fatigue crack growth rate using the equivalent stress intensity factors proposed by previous researchers was lower than that of pure mode I at the initial stage of crack growth when the load angle increases.

• Periodical: Key Engineering Materials (Volume 814)
• Pages: 176-181
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.814.176
• Online since: July 2019
• Authors: Sang Hyun Hong, Sang Deok Kim, Jae Hoon Kim*
• Keywords: CTS Specimen, Fatigue Crack Growth Rate, Mixed Mode

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