A Zener-Stroh crack is formed by coalescing a dislocation pileup and therefore is a net dislocation loaded crack. In this paper, the interaction between a Zener-Stroch crack and surrounding cylindrical fibers in a fiber-reinforced composite material has been investigated. The crack is located in the matrix and near a fiber, while the influence of other fibers on the crack is considered through the three-phase composite cylinder model. Using the solution of stress field for a single dislocation in a three-phase cylinder as the Green's function, the crack is represented by a continuous distribution of dislocations. A set of singular integral equations are thus formulated and solved numerically. The stress intensity factor (SIF) on the crack tip due to crack-inclusions interaction is calculated. The results show that the volume concentration of fibers has non-negligible influence on the SIF of the crack. (C) 2000 Elsevier Science Ltd. All rights reserved.
机构:
East China Univ Sci & Technol, Sch Mech & Power Engn, 130 Meilong Rd, Shanghai 200237, Peoples R ChinaEast China Univ Sci & Technol, Sch Mech & Power Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China
Wang, Xu
Schiavone, Peter
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机构:
Univ Alberta, Dept Mech Engn, 10 203 Donadeo Innovat Ctr Engn, Edmonton, AB T6G 1H9, CanadaEast China Univ Sci & Technol, Sch Mech & Power Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China