Equivalent energy-based critical plane fatigue damage parameter for multiaxial LCF under variable amplitude loading. (February 2020)

• Record Type: Journal Article
• Authors: Xue, Long; Shang, De-Guang; Li, Dao-Hang; Li, Luo-Jin; Liu, Xiao-Dong; Chen, Hong
• Is Part Of: International journal of fatigue. Volume 131(2020)
• Publication Date: 2020-02
• Subjects: Multiaxial fatigue -- Life assessment -- Variable amplitude loading -- Critical plane; Materials -- Fatigue -- Periodicals; Materials -- Fatigue; Periodicals; 620.1122
• DOI: 10.1016/j.ijfatigue.2019.105350
• Languages: English
• ISSNs: 0142-1123

Abstract

Highlights: An equivalent energy-based critical plane damage parameter is proposed. No other additional material constants are needed for the proposed method. Non-proportional cycle hardening and mean stress can be reflected more perfectly. The method shows great potential under multiaxial random fatigue loading. Abstract: Combining the concept of energy on the critical plane, a multiaxial fatigue damage parameter without any weight coefficient was proposed and the effects of non-proportional additional hardening and mean stress on fatigue damage can be reflected more perfectly using an equivalent form of shear strain energy. Furthermore, two sets of experimental data are employed to verify the proposed method, and the sensitiveness to fatigue life of the proposed equivalent stress correction factor is discussed as well. The results show that satisfactory and conservative assessments can be obtained by the proposed method, especially under multiaxial irregular loading with great randomness.