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{{Language_sel|LANG=ger|ARTIKEL=Rissinitiierung}}
{{PSM_Infobox}}
<span style="font-size:1.2em;font-weight:bold;">Crack initiation</span>
__FORCETOC__

==Initiation of a crack==

Crack initiation is essentially the transition from a stationary [[Crack|crack]] to a moving crack. Starting from microdefects in the [[Material & Werkstoff|material]] volume, the resulting [[Fracture Mechanics|stress concentrations]] cause the fracture [[Strength|strength]] to be exceeded locally, thereby initiating a crack [1–2]. This is followed either by [[Crack Propagation|crack propagation]] or crack arrest. Crack initiation is often preceded by [[Crack Opening|crack blunting]] (see also: [[Fracture Mechanics|fracture mechanics]] and [[Crack Resistance (R) Curve|crack resistance curve]]).

[[Fracture Mechanical Testing|Fracture mechanics]] testing makes it possible to determine [[Material Value|characteristic values]] that can be used to characterise the material's resistance to crack initiation [3].

==See also==

* [[Crack]]
* [[Fracture Formation|Fracture formation]]
* [[Crack Propagation|Crack propagation]]
* [[Fracture]]
* [[Fracture Mechanics|Fracture mechanics]]
* [[Notch]]

'''References'''

{|
|-valign="top"
|[1]
|[[Blumenauer, Horst|Blumenauer, H.]], Pusch, G.: Technische Bruchmechanik. Deutscher Verlag für Grundstoffindustrie, Leipzig Stuttgart (1993) 3rd Edition, (ISBN 3-342-00659-5; see [[AMK-Büchersammlung|AMK-Library]] under A 29-3)
|-valign="top"
|[2]
|Anderson, T. L.: Fracture Mechanics; Fundamentals and Applications. CRC Press, Boca Raton (2005) 3rd Edition, (ISBN 978-0849342608; see [[AMK-Büchersammlung|AMK-Library]] under E 8-2); https://doi.org/10.1201/9781315370293
|-valign="top"
|[3]
|[[Grellmann, Wolfgang|Grellmann, W.]], [[Seidler, Sabine|Seidler, S.]] (Eds.): Polymer Testing. Carl Hanser, Munich (2022) 3rd Edition, pp. 236–239, (ISBN 978-1-56990-806-8; e-book 978-1-56990-807-5; see [[AMK-Büchersammlung|AMK-Library]] under A 22)
|}

[[Category:Fracture Mechanics]]
[[Category:Instrumented Impact Test]]

Crack Initiation - Revision history