Scales of metal fatigue cracking
| Autor: | A. A. Shanyavsky |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Fatigue cracking
Materials science Effective stress Fatigue testing Surfaces and Interfaces Condensed Matter Physics Rotation Shear (sheet metal) Metal Stress (mechanics) Mechanics of Materials visual_art visual_art.visual_art_medium Forensic engineering General Materials Science Composite material Stress concentration |
| Zdroj: | Physical Mesomechanics. 18:163-173 |
| ISSN: | 1990-5424 1029-9599 |
| Popis: | A new paradigm is proposed for considering metal fatigue cracking based on the principles of synergetics and physical mesomechanics. Fatigue cracking is described as a three-stage process. Metal evolution is studied with stress growth from the micro- (ultrahigh cycle fatigue) to meso- (high cycle fatigue) and then macroscale (low cycle fatigue). The notion of two effective stress concentration factors on the metal surface and in its bulk is introduced; their variation pattern with stress growth is discussed. In the general case, the propagation of through-the-thickness cracks is shown to also occur in three stages—on the micro- (shear), meso- (rotation with the formation of triangular fatigue striations) and macroscale (rotation plus shear which lead to the formation of fatigue striations of complex shape), consecutively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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