Author： Congyue W.
Publisher： Springer Publishing Company
ISSN： 0929-189X
Source： Applied Composite Materials, Vol.3, Iss.1, 1996-01, pp. : 43-64
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Abstract
An analytical model based on the shear-lag theory has been developed to predict the failure behavior of unidirectional composites with a center surface notch under uniaxial tensile load. A delay effect on two split faces touching each other is taken account in the analytical model. The equations obtained by the analytical model are solved using a variational technique - the principle of minimum potential energy (PMPE). Combining the fracture criterion of energy release rate with the experimental data gathered from tests, we have numerically predicted longitudinal split initiation and split growth. The predicted results are in agreement witht the experimental results. The prodicted results and experimental results both apparently show two regions - the first stable split growth and the second rapid split growth.
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