Fracture mechanics approach for a partially debonded cylindrical fibre

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• 作者：Roberto Brighenti ; Andrea Carpinteri ; Daniela Scorza
• 关键词：A. Fibres ; B. Debonding ; B. Fracture ; Stress-intensity factor
• 刊名：Composites Part B: Engineering
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：53
• 期：Complete
• 页码：169-178
• 全文大小：1787 K

文摘

The mechanical behaviour of the fibre-reinforced composites depends on the properties of the matrix, the fibres and their reciprocal bonding. Degrading effects occurring in such materials under service - such as matrix-fibre detaching (debonding), fibre breaking, matrix cracking - must be taken into account in the safety assessments. In the present paper, the fibre-matrix debonding phenomenon at the fibre-matrix interface is examined through fracture mechanics concepts, since a geometric discontinuity arises at the edge of the debonded zone (between two dissimilar materials) producing a stress singularity. The mixed mode stress-intensity factors are determined, and the effects of the geometrical and mechanical parameters related to matrix and fibres are discussed.