Fatigue Fracture Topography


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Fatigue Fracture Topography
Fatigue Fracture TopographyConsider a material which has a certain yield strength, obtained from testing a cylinder of this material in a simple tensile test. Thus if a cylindrical sample of this material is loaded to an axial stress two-thirds of the yield strength, then plastic deformation and fracture are not expected to occur. However, if the axial load is cycled between zero and this two-thirds value, after sufficient cycles fracture may occur. This is called a fatigue fracture. Since most structural and machine components operate under alternating loading, fatigue failures are relatively common, and being able to recognize them from the fracture-surface topography is important.In fatigue fractures the loading level is usually macroscopically below that req…
Citation
Charlie R. Brooks; Ashok Choudhury: Failure Analysis of Engineering Materials. Fatigue Fracture Topography, Chapter (McGraw-Hill Professional, 2002), AccessEngineering Export