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Mechanics Of Crack Bridging Under Dynamic Loads

Published online by Cambridge University Press:  21 March 2011

N. Sridhar ,
B.N. Cox ,
C.L. Dunn  and
I.J. Beyerlein
N. Sridhar
Affiliation:
Rockwell Science Center, 1049 Camino Dos Rios, Thousand Oaks, CA, U.S.A
B.N. Cox
Affiliation:
Rockwell Science Center, 1049 Camino Dos Rios, Thousand Oaks, CA, U.S.A
C.L. Dunn
Affiliation:
Massachusetts Institute of Technology, Cambridge, MA, U.S.A
I.J. Beyerlein
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM, U.S.A
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Abstract

A bridging law for fiber reinforced composites under dynamic crack propagation conditions has been derived. Inertial effects in the mechanism of fibre pullout during dynamic propagation of a bridged crack are critically examined for the first time. By reposing simple shear lag models of pullout as problems of dynamic wave propagation, the effect of the frictional coupling between the fibres and the matrix is accounted for in a fairly straightforward way. The solutions yield the time-dependent relationship between the crack opening displacement and the bridging traction. Engineering criteria and the role of material and geometrical parameters for significant inertial effects are identified.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 653: Symposium Z – Multiscale Modeling of Materials-2000 , 2000 , Z2.5.1
Copyright
Copyright © Materials Research Society 2001

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References

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