SH波对一维六方准晶中直裂纹的散射  

The scattering of SH wave on a linear crack in one-dimensional hexagonal quasicrystal

作　　者：赵雪芬[1,2] 李星[1,3] 

机构地区：[1]宁夏大学数学计算机学院,银川750021 [2]宁夏大学新华学院,银川750021 [3]宁夏师范学院,固原756000

出　　处：《计算力学学报》2015年第5期693-698,共6页Chinese Journal of Computational Mechanics

基　　金：国家自然科学基金(11362018);高等学校博士学科点专项科研基金(20116401110002)资助项目

摘　　要：分析了SH波对一维六方准晶中直裂纹的散射问题。利用积分变换技术,结合Copson方法,通过求解对偶积分方程,得到声子场和相位子场应力、位移及裂纹尖端动应力强度因子的解析表达式。通过数值算例讨论了裂纹长度、入射角和入射波频率对标准动应力强度因子的影响,此研究在工程材料应用中有一定的参考价值。The scattering of SH wave in one-dimensional hexagonal quasicrystal with a linear crack is studyed in the paper.By using the intergral transform technique and combining with Copson methods, through solving dual integral equations,the analytical expression of phonon field stresses,phason field stresses,phonon field displacements,phason field displacements and dynamic stress intensity factor at crack tip are obtained.Numerical examples are used to discuss the impact of the crack length,incident angle,incident wave frequencies on dynamic stress intensity factors.The research has certain value in en-gineering materials application.

关 键 词：SH 波散射 一维六方准晶 直裂纹 对偶积分方程 标准动应力强度因子 

分 类 号：O343[理学—固体力学]