Development of new V(z) curve technique for soft materials

Chiaki Miyasaka; Koichi Komaki; Bernhard R. Tittmann

doi:10.1117/12.385490

13 May 2000 Development of new V(z) curve technique for soft materials

Chiaki Miyasaka, Koichi Komaki, Bernhard R. Tittmann

Proceedings Volume 3993, Nondestructive Evaluation of Aging Materials and Composites IV; (2000) https://doi.org/10.1117/12.385490
Event: SPIE's 5th Annual International Symposium on Nondestructive Evaluation and Health Monitoring of Aging Infrastructure, 2000, Newport Beach, CA, United States

Abstract

The present article reports a technique to characterize small portions in the order of a few micron of a soft anisotropic material. The heart muscle was selected for specimen as an example of the soft material. The heart muscle was cut by a microtome and coated on a substrate. The thickness of the specimen was substantially 3 micrometer. For the substrate, fused quartz was used because its elastic properties are known and stable. The spherical acoustic lens was used to determine the position for the measurement. Considering the anisotropy of the specimen, the cylindrical lens was used to measure velocities of the Rayleigh waves propagating within the specimen. The frequency of 400 MHz was used for both the visualization and the measurement. The generation of the Rayleigh waves in the above conditions was confirmed by numerical calculations based on the wave propagation theory for layered media. As a result, the variation of the velocities representing the anisotropy of elastic properties were obtained and found to be about 7%.

Citation Download Citation

Chiaki Miyasaka, Koichi Komaki, and Bernhard R. Tittmann "Development of new V(z) curve technique for soft materials", Proc. SPIE 3993, Nondestructive Evaluation of Aging Materials and Composites IV, (13 May 2000); https://doi.org/10.1117/12.385490

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