In materials science, fatigue is the initiation and propagation of cracks in a material due to cyclic loading. Once a fatigue crack has initiated, it grows a small amount with each loading cycle, typically producing striations on some parts of the fracture surface.

Fatigue is a slow cycle-number-dependent irreversible process of plastic deformation when a material is under cyclic loading. It is a progressive and localized type of structural damage. Fatigue is caused by stress levels less than the ultimate tensile strength or …

Department of Materials Science and Engineering Massachusetts Institute of Technology Cambridge, MA 02139 May 1, 2001 ... 1H.W.Hayden,W.G.Mo att,andJ.Wul ,The Structure and Properties of Materials, Vol.III,JohnWiley &Sons,1965. 2A Guide for Fatigue Testing and the Statistical Analysis of Fatigue Data, ASTMSTP-91-A,1963. 3.

2023年9月1日 · The subjects are multidisciplinary and divided into several topics including: (i) fatigue and fracture of additively manufactured materials, (ii) microstructure, micro-scale effects, and mechanical properties, (iii) surrogate approaches applied to mechanical properties relevant to fatigue and fracture, (iv) probabilistic modeling for fatigue ...

2023年10月18日 · Fatigue failure of parts and components can be categorized to high cyclic, low-cycle fatigue, extremely low cycle fatigue, corrosion fatigue, and thermal fatigue. Here the features and parameters that control each process are discussed:

2022年9月1日 · We discerned the physical origins of fatigue strength in a large set of face-centered cubic, hexagonal close-packed, and body-centered cubic metallic materials by considering cyclic deformation processes at nanometer resolution over large volumes of individual materials at the earliest stages of cycling.

This lecture outlines the fatigue behavior of materials, focusing on the stress-life (S-N) and strain-life methods to characterize the fatigue response of metals. It explores the mechanisms of crack propagation stages, the influence of strain amplitude in fatigue cycles, and the significance of local plastic strains at notches.

2023年9月11日 · Have you ever wondered why materials fail under repeated stress, even when the stress levels seem manageable? This article dives into the six critical factors affecting the fatigue properties of materials.

2023年1月5日 · Fatigue test data is used for curve fitting a degradation evolution function using stress, strain, or energy as a variable. Unified mechanics theory (UMT), on the other hand, unifies the...

2024年11月11日 · What is Material Fatigue Strength? How do fatigue strength and fatigue limit differ in material science? How can engineers enhance the fatigue strength of structural components? What are common signs of fatigue failure in materials? How does environmental exposure affect the fatigue strength of materials?