Crack profiles in applied moment double
cantilever beam tests
C.H. Hsueh, E.Y. Sun, P.F. Becher, K.P. Plucknett
(Oak Ridge National Laboratory)
In-situ
observations of crack propagation in an applied moment double cantilever
beam specimen were used previously to obtain the R-curve behavior of
ceramic composites. To predict the R-curve using constitutive models,
knowledge of the crack profile is required to derive the bridging
stress distribution along the crack length and to analyze the toughening
effect. To predict the crack profile in an applied moment double
cantilever beam test, both the deformation of the crack surface due to the
bending moment and the movement of the crack surface due to the rigid
body motion of the loading fixture need to be considered. The analytical
solution for the crack profile is derived in the present study. The
predicted crack profiles agree well with experimental measurements.
Order No.:
JA809-027 © 1998 MRS
Go to September 1998 Table of Contents
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