SH 波对一维六方准晶中直裂纹的散射

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.