Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 07, 2017 - October 09, 2017
Wooden materials and biodegradable polymers have attracted much attention as promising materials to achieve carbon neutrality and biodegradability. To ensure the quality of wooden materials, nondestructive evaluation techniques need to be developed. On the other hand, the films and fibers made of poly-L-lactic acid, as one of biodegradable polymers, are expected to be employed in the human-machine interface devices and surgery instruments. For safe operation of applications using these materials, the thermoelectroelastic field inside the material must be elucidated. From a mesoscopic viewpoint, both materials are considered to have D∞ symmetry, which is characterized by an infinite rotation axis and a two-fold rotation axis perpendicular to it. In this study, we analyze the thermoelectroelastic field in a body with D∞ symmetry. As an example, we treat a semi-infinite body subjected to a combined load of the surface shear and temperature fluctuation. Following the summary of the analytical method derived by us, the elastic, piezoelastic, and thermoelastic displacement potential functions are obtained by applying that analytical method and the Fourier transform techniques, and the thermoelectroelastic field quantities are explicitly formulated. By numerical calculation, the field quantities are investigated qualitatively and quantitatively. As a result, the importance of thermal considerations in the sensor applications using D∞ bodies.
