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

Sharon Kao-Walter; Per Ståhle; Shao Hua Chen

doi:10.4028/www.scientific.net/KEM.312.173

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 312A Finite Element Analysis of a Crack Penetrating...

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

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.

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Periodical:

Key Engineering Materials (Volume 312)

Pages:

173-178

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.312.173

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Online since:

June 2006

Authors:

Sharon Kao-Walter, Per Ståhle, Shao Hua Chen

Keywords:

Adhesion, Crack Tip Driving Force, Deflecting, Interface, Penetrating

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