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Home  >  Journal list  >  Journal of the Society of Materials Science, Japan  >  Vol.55  No.9 (2006)  >  pp.831-836

Journal of the Society of Materials Science, Japan
<<Previous article Vol.55  No.9 (2006)   pp.831 - 836 Next article>>

Characterization of Interlaminar Shear Strength of a Unidirectional Carbon/Epoxy Laminated Composite : Effect of Deformation Rate

Takashi YOKOYAMA1) and Kenji NAKAI1)
1) Dept. of Mech. Eng., Okayama Univ. of Sci.


The interlaminar shear strength (ILSS) of a unidirectional carbon/epoxy (T700/2521) laminated composite under impact loading is determined using the conventional split Hopkinson pressure bar. Double-notch shear (DNS) specimens with lateral constraint from a supporting jig are used in the static and impact interlaminar compressive shear tests. Short-beam shear specimens are also used under static 3-point bending. Finite element analyses are performed to determine the shear stress and normal stress distributions on the expected failure plane in the DNS specimen using the MSC/NASTRAN package. The effects of deformation rate at failure on the ILSS and failure mode are investigated. It is observed that the ILSS is independent of the deformation rate at failure up to nearly 1.5m/s. The validity of the test results is confirmed by microscopic examinations of both static and impact failure surfaces for the DNS specimens.


Keyword:
Deformation rate, Double-notch shear specimen, Failure mode, FEM, Hopkinson bar, Impact loading, Interlaminar shear strength, SEM observation, Short-beam shear specimen, Unidirectional CFRP

Received: December 20, 2005
Published online: September 15, 2006
Copyright (c) 2006 by The Society of Materials Science, Japan

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