A Finite Element Analysis of a Crack Penetrating or Deflecting into an Interface in a Thin Laminate

Document type: Journal Articles
Article type: Original article
Peer reviewed: Yes
Full text:
Author(s): Sharon Kao-Walter, Per Ståhle, S.H. Chen
Title: A Finite Element Analysis of a Crack Penetrating or Deflecting into an Interface in a Thin Laminate
Journal: Key Engineering Materials
Year: 2006
Volume: 312
Pagination: 173-178
ISSN: 1013-9826
Publisher: Trans. Tech. Publications
City: Switzerland
ISI number: 000237329600029
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Mechanical Engineering (Sektionen för teknik – avd. för maskinteknik)
School of Engineering S- 371 79 Karlskrona
+46 455 38 50 00
http://www.bth.se/ing/
Authors e-mail: Sharon.kao-walter@bth.se, per.stahle@ts.mah.se, chenshaohua72@hotmail.com
Language: English
Abstract: The crack tip driving force of a crack growing from a pre-crack that is perpendicular to and terminating at an interface between two materials is investigated using a linear fracture mechanics theory. The analysis is performed both for a crack penetrating the interface, growing straight ahead, and for a crack deflecting into the interface. The results from finite element calculations are compared with asymptotic solutions for infinitesimally small crack extensions. The solution is found to be accurate even for fairly large amounts of crack growth. Further, by comparing the crack tip driving force of the deflected crack with that of the penetrating crack, it is shown how to control the path of the crack by choosing the adhesion of the interface relative to the material toughness.
Subject: Mechanical Engineering\General
Mechanical Engineering\Structural Mechanics
Keywords: Interface, crack tip driving force, adhesion, deflecting, penetrating.
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