和田助教 の論文が Japanese Journal of Applied Physics に掲載

粉末床溶融法で造形された金属材料の超音波工具向け異方性弾性特性推定に関する和田助教の論文が  Japanese Journal of Applied Physics に掲載されました。

Yuji Wada, Kentaro Nakamura. Anisotropic elastic property estimation of powder-bed-fusion-printed metal for ultrasonic tools, Japanese Journal of Applied Physics, vol.65, 04SP07, (2026).

Metal three-dimensional printers utilizing powder bed fusion (PBF) hold promise for the development of novel ultrasonic transducers with complex
geometries especially designed by topology optimization. Since the printed metal components exhibit anisotropy, an anisotropic elasticity tensor is
required for finite element analysis and optimization. In this study, we fabricate test pieces of SUS316L stainless steel, which is commonly used in
PBF and ultrasonic transducers. We estimate all elements of the stiffness tensor by utilizing the mechanical resonant characteristics of the test
pieces. Anisotropic Young’s moduli and resonance quality factors are measured using a laser Doppler velocimeter for the longitudinal vibration
mode that is noncontact-driven via electromagnetic acoustic transduction. Poisson’s ratios and shear moduli are estimated using a point excitation
source driving the longitudinal and torsional modes, respectively. The obtained anisotropic elasticity tensor is verified using the bending vibration
frequency and the vibration distribution of the PBF-fabricated ultrasonic tool.