Stress Concentration


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Stress Concentration
Stress ConcentrationSo far we have considered geometries with constant cross-sectional areas. Machine components, however, are usually not so simple; even at the surface there are irregularities from machining. Consider a cylinder of a cross-sectional area of 20 in2 (129 cm2) loaded axially with 2000 lb (8900 N). If the load is applied uniformly, then each unit of area has the same load on it. For simplicity we can think of each square inch supporting 100 lb (445 N) to give a normal stress of 100 lb/in2 (689,000 Pa). Also the lines centered on each square inch can be considered to be a line of force (or stress line), as depicted in Fig. 2.15
Citation
Charlie R. Brooks; Ashok Choudhury: Failure Analysis of Engineering Materials. Stress Concentration, Chapter (McGraw-Hill Professional, 2002), AccessEngineering Export