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== Relation with other crack tip parameters ==
=== K and CTOD ===
CTOD can be expressed in terms of stress intensity factor <math>K</math> as: <ref name=":1">{{cite book |first=T. L. |last=Anderson |title=Fracture Mechanics: Fundamentals and Applications |edition=Third |url={{google books |plainurl=y |id=MxrtsC-ZooQC}}|date=24 June 2005|publisher=CRC Press|isbn=978-0-8493-1656-2 |pages=104–105}}</ref>
:<math>\delta_\text{t} = \frac{4}{\pi}\frac{K^2}{m\sigma_\text{y} E} </math>
where <math>\sigma_\text{y}</math> is the yield strength, <math>E</math> is Young's modulus and <math>m=1</math> for [[plane stress]] and <math>m=2</math> for [[plane strain]].
=== G and CTOD ===
CTOD can be related to the energy release rate G as: <ref name=":1" />
<math>\delta_t= \frac{4}{\pi} \frac{G}{\sigma_{y}}</math>
=== J-integral and CTOD ===
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