Crack tip opening displacement: Difference between revisions

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Revision as of 09:32, 14 August 2019

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{{Technical|date=April 2013}}

'''Crack tip opening displacement''' (CTOD) is the displacementdistance atbetween the originalopposite faces of a [[fracture|crack]] tip andat the 90° intercept position. The position behind the crack tip at which the distance is measured is arbitrary but commonly used is the point where two 45° lines starting at the crack tip intercept the crack faces.<ref>{{cite book |last1=Suresh |first1=S. |date=2004 |title=Fatigue of Materials |publisher=Cambridge University Press |isbn=978-0-521-57046-6}}</ref>

[[Fracture mechanics#Linear elastic fracture mechanics|LEFM]] (Linear elastic [[fracture mechanics]]) is not valid. This assumption was proven when a unique relationship between CTOD and the [[J integral]] was established.{{sfn|Anderson|2005}}

== Relationship between K and CTOD ==