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Fatigue has traditionally been associated with the failure of metal components which led to the term metal fatigue. In the nineteenth century, the sudden failing of metal railway axles was thought to be caused by the metal crystallising because of the brittle appearance of the fracture surface, but this has since been disproved. [1]
Metal fatigue, weakened condition induced in metal parts of machines, vehicles, or structures by repeated stresses or loadings, ultimately resulting in fracture under a stress much weaker than that necessary to cause fracture in a single application. Though the term dates back to the 19th century.
- The Editors of Encyclopaedia Britannica
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Metal fatigue is the common name used to describe the unexpected failure of metal parts by progressive fracturing while in service. Metal fatigue is directly related to the number of stress cycles undergone by a part and the level of stress imposed on the part. Studies have shown that infinite life for a metal part is possible if the local ...
- Mike Sondalini
- What is fatigue? Fatigue refers to the decline in the structural performance of materials, particularly metals, when subjected to cyclic stress or strain, ultimately leading to failure.
- Types of fatigue 1. Impact fatigue. It refers to fatigue caused by repeated impact loads. When the number of impacts, N, is less than 500 to 1000, the parts can become damaged and the fracture form of the parts will be similar to that of a single impact.
- Fatigue life. When a material or mechanical component fails, the total life usually consists of three parts: 1. Crack initiation life. A significant number of engineering studies have demonstrated that the crack initiation life of mechanical components accounts for a large portion, even up to 90%, of the total fatigue life during actual service.
- Fatigue form of metal materials. Fatigue of metal materials mainly includes the following: General Plastic Deformation; Low-Cycle Fatigue Plastic Deformation;
Metal fatigue is a critical concept in the field of material science and engineering, representing a type of failure unique to metals and alloys under specific conditions. It occurs as a result of repeated, fluctuating stresses that are often, surprisingly, lower than the strength the material would typically withstand.
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fatigue, in engineering, manifestation of progressive fracture in a solid under cyclic loading as in the case of a metal strip that ruptures after repeated bending back and forth. Fatigue fracture begins with one or several cracks on the surface that spread inward in the course of repeated application of forces until complete rupture suddenly occurs when the small unaffected portion is too ...
