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Repulsive interaction between coplanar cracks in the double–cantilever geometry

Published online by Cambridge University Press:  31 January 2011

Kai-tak Wan ,
Brian R. Lawn  and
Roger G. Horn
Kai-tak Wan
Affiliation:
Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742
Brian R. Lawn
Affiliation:
Ceramics Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
Roger G. Horn
Affiliation:
Ceramics Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
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Abstract

Experiments on thin mica sheets are used to demonstrate that coplanar cracks in double-cantilever beam specimens do not universally attract each other, as conventionally portrayed, but, at long range, actually repel. An elasticity analysis explains the repulsion in terms of a compression zone, ≍0.35 times the beam half-thickness ahead of the crack tip, generated by bending moments from the cantilever arms on the remaining specimen section.

Type
Articles
Information
Journal of Materials Research , Volume 7 , Issue 6 , June 1992 , pp. 1584 - 1588
Copyright
Copyright © Materials Research Society 1992

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