Experimental Investigation on Fatigue Crack Propagation Under Mixed Mode Loading on Aluminum Alloy AA3033

Authors

  • Hichem MEBARKI Center of Research in Mechanics (CRM) , BP N73B, Freres Ferrad, Ain El Bey, Constantine 25021, Algeria https://orcid.org/0009-0001-1615-2493
  • Hamida FEKIRINI Laboratory of Mechanics and Physical Materials (LMPM), Faculty of Technology – Department of Mechanical Engi-neering, University Djillali Liabes of Sidi Bel Abbes, B.P. 89, Cité Ben M’Hidi, Sidi Bel Abbes 22000, Algeria https://orcid.org/0000-0001-6013-9977
  • Mohamed BENGUEDIAB Laboratory of Material and Reactive Systems (LMRS) Faculty of Technology, Department of Mechanical Engineering, University Djillali Liabes of Sidi Bel Abbes, B.P 89 Cité Ben M’Hidi, Sidi Bel- Abbes 22000, Algeria https://orcid.org/0000-0003-1523-2798
  • Abdelkader LOUSDAD Laboratory of Mechanics of Structures and Solids (LMSS), Faculty of Technology, Department of Mechanical Engineering, University Djillali Liabes of Sidi Bel Abbes, B.P 89 Cité Ben M’Hidi, Sidi Bel- Abbes 22000, Algeria https://orcid.org/0000-0001-5430-1798

DOI:

https://doi.org/10.5755/j02.mech.39182

Keywords:

CTS Specimen, mixed mode fatigue crack growth, Arcan device, fatigue life

Abstract

The phenomenon of fatigue-crack propagation is a permanent concern for designers, manufactures and users in order to ensure the integrity of structures subjected to cyclical stresses during their operational service. The concept of damage tolerance (DT) is the most commonly used for the design of structures with the prediction of fatigue life crack propagation. Most researchers have focused on studying fatigue crack propagation under mode I loading conditions. However, these structures in service are often subject to complex constraints and combined stresses that can generate local loadings in mixed modes I, II and mode III. In this regard this paper presents a study of fatigue crack propagation in mixed mode (I+II) using CTS (compact-tension-Shear) specimens for three loading angles (45°, 60°, and 90°) respectively.  The mixed-mode fatigue crack propagation tests were carried out in modes I and II using the CTS specimen and Arcan loading device specially designed and constructed by our laboratory based on the Richards principle. The experimental results show that the loading angle has a significant effect on the crack growth rate and consequently on the fatigue life prediction of mechanical structure under fatigue loading.

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Published

2025-07-06

Issue

Vol. 31 No. 3 (2025)

Section

MECHANICS OF SOLID BODIES

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Copyright (c) 2025 Mechanics

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This work is licensed under a Creative Commons Attribution 4.0 International License.