一维六方压电准晶双材料界面共线裂纹问题  

Research on Interfacial Collinear Cracks Between 1D Hexagonal Piezoelectric Quasicrystal Bimaterials

作　　者：卢绍楠 赵雪芬[2] 马园园 LU Shaonan;ZHAO Xuefen;MA Yuanyuan(School of Mathematics and Statistics,Ningxia University,Yinchuan 750021,P.R.China;Xinhua College,Ningxia University,Yinchuan 750021,P.R.China)

机构地区：[1]宁夏大学数学统计学院,银川750021 [2]宁夏大学新华学院,银川750021

出　　处：《应用数学和力学》2023年第7期809-824,共16页Applied Mathematics and Mechanics

基　　金：国家自然科学基金项目(12062021);宁夏自然科学基金项目(2022AAC03013)。

摘　　要：利用复变函数理论中的解析延拓、奇性主部分析和推广的Liouville定理,求解了一维六方压电准晶双材料在集中载荷作用下界面共线裂纹反平面弹性问题.导出了含有一条和两条有限长界面裂纹的封闭解,同时给出了裂纹尖端场强度因子(包含声子场和相位子场应力强度因子和电位移强度因子)的表达式.数值算例分析了外荷载与耦合系数之比对裂纹尖端场强度因子变化规律的影响.从数值结果中可以看出,当裂纹长度增加时,裂纹尖端场强度因子随之增加;应力强度因子随双材料耦合系数之比的增大而增大,电位移强度因子几乎不变;不同载荷作用下,裂纹尖端场强度因子随着裂纹长度改变时的变化趋势也不尽相同.研究结果可为压电准晶双材料的设计和制备提供一定的理论参考.By means of the analytic continuation,the singularity principal part analysis and the extended Liouville theorem in the complex function theory,the anti-plane elastic problem of interfacial collinear cracks between 1D hexagonal piezoelectric quasicrystal bimaterials under concentrated loads,was addressed.The closed solutions for biomaterial interface containing 1 and 2 finite-length cracks under concentrated loads were derived.At the same time,the crack tip field intensity factors(including the phonon field,the phason field stress intensity factors and the electric displacement intensity factor) were given.The effects of the ratio of the external load to the coupling coefficient on the intensity factor variation of the crack tip field were analyzed by numerical examples.The numerical results show that,the intensity factor of the crack tip field increases with the crack length and with the ratio of coupling coefficients,while the electric displacement intensity factor keeps almost unchanged.The field intensity factor of the crack tip varies with the crack length in different styles under different loads.The research results provide a theoretical reference for the design and preparation of piezoelectric quasicrystals.

关 键 词：一维六方压电准晶双材料 界面共线裂纹 复变函数方法 场强度因子 

分 类 号：O343.8[理学—固体力学]