Numerical simulation of ultrasonic wave propagation in anisotropic and attenuative solid materials

• Published in: IEEE transactions on ultrasonics, ferroelectrics, and frequency control Vol. 38; no. 5; pp. 436 - 445
• Main Authors: You, Z., Lusk, M., Ludwig, R., Lord, W.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.09.1991; Institute of Electrical and Electronics Engineers
• Subjects: Acoustics; Aluminum; Anisotropic magnetoresistance; Attenuation; Damping; Elastodynamics; Exact sciences and technology; Finite element methods; Fundamental areas of phenomenology (including applications); Numerical simulation; Physics; Prediction algorithms; Tensile stress; Transducers; Ultrasonics, quantum acoustics, and physical effects of sound; Finite element method; Computer program; Anisotropic material; Transverse isotropy; Numerical simulation; Wave damping; Experimental study; Non destructive test; Axial symmetry; Ultrasound; Viscous damping
• ISSN: 0885-3010; 1525-8955
• DOI: 10.1109/58.84288

The axisymmetric elastodynamic finite element code developed is capable of predicting quantitatively accurate displacement fields for elastic wave propagation in isotropic and transversely isotropic materials. The numerical algorithm incorporates viscous damping by adding a time-dependent tensor to Hooke's law. Amplitude comparisons are made between the geometric attenuation in the far field and the corresponding finite element predictions to investigate the quality and validity of the code. Through-transmission experimental measurements made with a 1 MHz L-wave transducer attached to an aluminum sample support the code predictions. The algorithm successfully models geometric beam spreading dispersion and energy absorption due to viscous damping. This numerical model is a viable tool for the study of elastic wave propagation in nondestructive testing applications.< >