Latest revision as of 10:45, 27 November 2025

Abstract

Mechanical failures have caused significant damage and financial losses. However, compared to the vast number of successful designs for mechanical components and structures, mechanical failures are relatively rare. Mechanical failures involve a highly complex interaction between time, load, and the environment, with the environment comprising two factors: temperature and corrosion. The load can be uniform, steady, variable, uniaxial, or multiaxial. Undesirable effects of cyclic loads lead to crack initiation and growth, ultimately resulting in component failure. In this study, the focus is on increasing the life of components under cyclic loading by investigating crack behavior and development in the presence of stop holes. The investigation was conducted on aluminum 7075. Initially, the arrangement of circular holes in the standard CT sample was obtained using Design Expert software to assess this effect. By performing simulations in Abaqus software, the life of each sample was determined. In the next stage, based on these results, the samples are subjected to examination in the presence of key-shaped notches.OPEN ACCESS Received: 22/03/2025 Accepted: 27/05/2025 Published: 27/11/2025

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