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Published in:
2006 | OriginalPaper | Chapter
Singular Stress Fields Situations in Mode-II and Mixed-Mode Loaded Cracks
Authors : Daniel Fernández-Zúñiga, Jörg F. Kalthoff, Antonio Blázquez, Alfonso Fernández-Canteli
Published in: Fracture of Nano and Engineering Materials and Structures
Publisher: Springer Netherlands
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The stress fields at initiation of a kinked (daughter) crack starting from a (mother) crack subjected to mode-II loading conditions and the influence of these stress fields on the instability condition is investigated. In the literature, often the stress distribution along the prospective propagation direction of the daughter crack (before the daughter crack is actually formed), is considered and postulated to be the actual driving force for the crack formation [
1
,
2
]. Special emphasis is given in this paper to the changes the stress fields experience in the transition phase from
before
to
after
the kinked daughter crack is initiated; in addition, the situation is studied for growing lengths of the daughter crack, from very small crack lengths approaching zero till medium sized crack lengths. It is found that, the conventional consideration of the stress distribution along the prospective path of the daughter crack represents a pseudo-mode-I stress distribution.