Beitrag in einem Tagungsband
Efficient simulation of crack growth in multiple-crack systems considering internal boundaries and interfaces



Details zur Publikation
Autor(inn)en:
Judt, P.; Ricoeur, A.
Herausgeber:
International Congress on Fracture
Verlag:
International Congress on Fracture
Verlagsort / Veröffentlichungsort:
Peking, China
Publikationsjahr:
2013
Seitenbereich:
1-10
Buchtitel:
Advances in Fracture Research. Proceedings of the 13th International Conference on Fracture

Zusammenfassung, Abstract


The paper presents numerical methods used for predicting crack paths in technical structures based on the theory of linear elastic fracture mechanics. To simulate crack growth, the FE-method is used in combination with a smart re-meshing algorithm. Different methods providing accurate crack loading parameters particularly for curved cracks such as the  J-integral or stress intensity factors (SIF) are presented. Path-independent contour integrals [12] are used to avoid special requirements concerning crack tip meshing and to enable efficient calculations for domains including interfaces and internal boundaries. The integration paths being finite and far from the crack tip, special attention has to be directed to the treatment of the crack face integral since the calculation of the coordinate J2 is challenging [5]. The same holds for the coordinate MII2 of the interaction integral related to a mode-II auxiliary loading.  In particular, the interaction of multiple cracks and internal boundaries and interfaces is investigated. Calculating the global J-integral, including all crack tips existing in a structure,  leads to the necessity of a separation procedure to determine the parts of J related to each single crack tip.




Schlagwörter
curved crack faces, fictitious crack faces, J-integral, M-integral, mixed-mode fracture


Autor(inn)en / Herausgeber(innen)

Zuletzt aktualisiert 2019-24-07 um 08:55