Comparative research on the accumulative damage rules under multiaxial block loading spectrum for 2024-T4 aluminum alloy

• Published in: International journal of fatigue Vol. 48; pp. 257 - 265
• Main Authors: Xia, Tian-xiang, Yao, Wei-xing
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.03.2013; Elsevier
• Subjects: 2024-T4 aluminum alloy; Accumulative damage rule; Aluminum base alloys; Amplitudes; Applied sciences; Block loading; Damage; Damage accumulation; Exact sciences and technology; Fatigue; Fatigue (materials); Fatigue tests; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; Multi-block loading spectrum; Multiaxial fatigue; Random block loading spectrum; Spectra; Multi-block loading spectrum; Random block loading spectrum; Multiaxial fatigue; Accumulative damage rule; 2024-T4 aluminum alloy; Aluminium base alloys; Random load; Mechanical properties; Fatigue; Multiaxial load
• ISSN: 0142-1123; 1879-3452
• DOI: 10.1016/j.ijfatigue.2012.11.004

► Multiaxial multi-block loading and random block loading tests are carried out. ► Five common used accumulative damage models are used to process testing results. ► These models’ capabilities under multiaxial loading are analyzed in detail. ► These models’ capabilities under multiaxial loading are compared with each other. ► These models’ properties under multiaxial loading are summarized. Different multiaxial multi-block loading and random block loading spectra were used to conduct variable amplitude fatigue tests on 2024-T4 aluminum alloy. These spectra were derived from 16 kinds of constant amplitude multiaxial loadings. Five accumulative damage models were introduced and the critical damages given by these models were compared with the experimental results. It is demonstrated that Palmgren–Miner-Law and Shamsaei’s approach both led to good coincidences with the experimental results, Manson’s damage curve approach (DCA) and Morrow’s rule were not suitable for both multiaxial multi-block loading and random block loading spectra, while Carpinteri’s model was inapplicable to 2024-T4 aluminum alloy.