Spies Martin
Fraunhofer-Institut Zerstörungsfreie Prüfverfahren (IZFP), Universität Saarbrücken, Geb. 37, 66123 Saarbrücken, Germany.
Ultrasonics. 2004 Apr;42(1-9):213-9. doi: 10.1016/j.ultras.2004.01.012.
Many modern structural materials exhibit anisotropic elastic behavior leading to complicated wave propagation phenomena. To ensure the reliability of ultrasonic nondestructive testing techniques, these material properties as well as the influence of microstructural inhomogeneities and the effects of interfaces on ultrasonic wave propagation have to be taken into account. In this respect, mathematical modeling provides an efficient method of assisting analysis. Two computationally efficient analytical approaches--a Gaussian beam and a point source superposition technique--are presented, which are well-suited for performing ultrasonic wave propagation and scattering simulations for anisotropic media. Results for homogeneous as well as inhomogeneous anisotropic media like composites and weld material are presented.
许多现代结构材料呈现出各向异性的弹性行为，导致复杂的波传播现象。为确保超声无损检测技术的可靠性，必须考虑这些材料特性以及微观结构不均匀性的影响和界面在超声波传播方面的作用。在这方面，数学建模提供了一种有效的辅助分析方法。本文提出了两种计算效率高的分析方法——高斯束法和点源叠加技术，它们非常适合于对各向异性介质进行超声波传播和散射模拟。文中给出了均质和非均质各向异性介质（如复合材料和焊接材料）的模拟结果。
