A study of the in situ transverse tensile lamina strength and the classical solution of the opening mode crack in a 0/90/0 laminate |
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Authors: | Fan Fuqun Dong Wanlin Wang Jianxiang |
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Institution: | (1) South China University of Technology, China;(2) Chengdu University of Science and Technology, Chengdu, China |
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Abstract: | In this paper, the classical solution of the opening mode crack in the 90° layer of 0/90/0 laminates has been determined by
means of Fourier transformations and the procedure of Copson for a pair of dual integral equations. The fracture behavior
and the in situ transverse strength of the 90° layer have been quantitatively studied in graphite/epoxy laminates, based on
the solution obtained above.
The results show that the stress intensity factor of this kind of laminates, which is different from that of a single unidirectional
90° layer, decreases with the increase in thicknessb, or modulusE
L orG
LT of the 0° layer and also decreases with the decrease in the thickness of the 90° layer. So the lamination effect manifests
itself and thein situ transverse strength of the 90° layer is thereby enchanced. The theoretical calculations agree with the experimental data
presented by D.L. Flaggs.
Supported by National Natural Science Fundation of China. |
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Keywords: | in situ transverse tensile lamina strength hybrid effect lamination effect synergic effect classical solution fracture behavior of laminated composites statistical fracture mechanics analysis |
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