集中力作用下多铁性板状复合材料的断裂分析.

The fracture mechanics model was established for the interfacial fracture problem of a multiferroic composite plate under concentrated force on the outer face. The Fourier integral transform and Green ’ s functions were employed to obtain the Cauchy-type singular integral e­quations, which were further discretized into algebraic equations through the Labatto-Cheby- shev collocation. The algebraic equations were numerically solved to determine the stress inten­sity factor (SIF). Analysis of the numerical results indicates that, the thickness of the piezoe­lectric layer, the crack length and the concentrated force location are 3 major factors to influ­ence the stress intensity factor at the crack tip. The effects of physical and geometric parame­ters on the stress intensity factor in this model provide theoretical references for the anti-frac­ture optimal design of related composite materials in engineering. [ABSTRACT FROM AUTHOR]