Fatigue Crack Growth Behavior in Al-7075 Under In-Plane Biaxial Loading with Mixed-Mode Overloads

Abhay Kumar Singh, Siddhant Datta, Aditi Chattopadhyay, Nam Phan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Fatigue crack behavior in cruciform specimens of Al 7075-T6 under in-plane biaxial loading with mix-mode overloads is investigated. Tests were performed to characterize the fatigue behavior at four different levels of mode-mixity, and for each value of mode-mixity, overloads were applied at three different crack lengths as crack propagated under biaxial tensile loading. A significant change in the fatigue life and the crack growth behavior of the specimen was observed with change in mode-mixity of the applied overload. Although there was an increase in fatigue life for all the cases of mix-mode overloads, the maximum increase was observed for the pure shear overload and the minimum increase was observed for tensile dominant overload. When the shear component in the mix-mode overload was comparable but higher than the tensile component, an increase in mode-mixity value did not always show the increase in the fatigue life of the specimen, which indicates that the increase in fatigue life is not only governed by the combined effect of shear and tensile component of loading but also it is impacted differently by shear and tensile loading.

Original languageEnglish (US)
Title of host publicationTMS 2020 149th Annual Meeting and Exhibition Supplemental Proceedings
EditorsZhiwei Peng, Jiann-Yang Hwang, Jerome Downey, Dean Gregurek, Baojun Zhao, Onuralp Yucel, Ender Keskinkilic, Tao Jiang, Jesse White, Morsi Mahmoud
PublisherSpringer
Pages1465-1478
Number of pages14
ISBN (Print)9783030362959
DOIs
StatePublished - Jan 1 2020
Externally publishedYes
Event149th Annual Meeting and Exhibition of the Minerals, Metals and Materials Society, TMS 2020 - San Diego, United States
Duration: Feb 23 2020Feb 27 2020

Publication series

NameMinerals, Metals and Materials Series
ISSN (Print)2367-1181
ISSN (Electronic)2367-1696

Conference

Conference149th Annual Meeting and Exhibition of the Minerals, Metals and Materials Society, TMS 2020
CountryUnited States
CitySan Diego
Period2/23/202/27/20

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Keywords

  • Biaxial fatigue
  • Crack acceleration
  • Crack propagation
  • Crack retardation
  • Mix-mode overload

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy Engineering and Power Technology
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

Singh, A. K., Datta, S., Chattopadhyay, A., & Phan, N. (2020). Fatigue Crack Growth Behavior in Al-7075 Under In-Plane Biaxial Loading with Mixed-Mode Overloads. In Z. Peng, J-Y. Hwang, J. Downey, D. Gregurek, B. Zhao, O. Yucel, E. Keskinkilic, T. Jiang, J. White, & M. Mahmoud (Eds.), TMS 2020 149th Annual Meeting and Exhibition Supplemental Proceedings (pp. 1465-1478). (Minerals, Metals and Materials Series). Springer. https://doi.org/10.1007/978-3-030-36296-6_136