Multilayered piezomagnetic/piezoelectric composites with periodic interfacial cracks subject to in-plane loading

作者：Tian, Wenxiang^*; Zhong, Zheng; Li, Yaochen

来源：Smart Materials and Structures, 2016, 25(1): 015029.

DOI：10.1088/0964-1726/25/1/015029

• multiferroic composite
• interfacial crack
• periodic crack
• stress intensity factor

A two-dimensional fracture problem of periodically distributed interfacial cracks in multilayered piezomagnetic/piezoelectric composites is studied under in-plane magnetic or electric loading. The magnetic permittivity of the piezoelectric material and the dielectric constant of the piezomagnetic material are considered. A system of singular integral equations of the second kind with a. Cauchy kernel is obtained by means of Fourier transform and further solved by using Jacobi polynomials. The problem is solved in the. real domain by constructing real fundamental solutions. The primary interfacial fracture mechanic. parameters, such as the stress intensity factors (SIFs), the electric displacement intensity factors (EDIFs), the magnetic induction. intensity factors (MIIFs) and the energy release rates (ERRs) are then obtained. It is found that a magnetic or electric loading normal to the crack surfaces can lead to a mixture of mode I and mode II type stress singularities at the crack tips. Numerical results show that increasing the thickness of the active layer will favor the crack initiation. Inversely, increasing the thickness of the passive layer will retard the crack initiation. Furthermore, the results indicate that the crack initiation can be inhibited by adjusting the direction of the applied magnetic or electric loading.

• 出版日期2016-1
• 单位同济大学