Microstructural Parameters in the Theory of Critical Distances


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The work described below investigates, for the first time, the link between microstructural parameters such as grain size and the length constant L which is known as the critical distance. L is frequently used in the prediction of failure processes such as brittle fracture and fatigue, initiated at stress concentration features such as notches. Values of L were calculated using data from the literature on the effect of short cracks and notches in steels and ceramics. In some cases, simple relationships could be established between L and the grain size, or other microstructural features. Sometimes L was found to be much larger than anything in the microstructure and appeared to be related to the size of the damage zone at failure.



Materials Science Forum (Volumes 567-568)

Edited by:

Pavel Šandera




D. Taylor "Microstructural Parameters in the Theory of Critical Distances", Materials Science Forum, Vols. 567-568, pp. 23-28, 2008

Online since:

December 2007





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