水浸式シングアラウンド法による固体材料の超音波速度に対する応力効果と力学的異方性

概要

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Tensile stress is applied to the specimens of polymethyl methacrylate (PMMA) and polystyrene (PS), using a mechanical device composed of screws and a lever, and its effect to the ultrasonic velocity is observed by water immersion ultrasonic sing-around method for both compressional wave and shear wave. The incidence angle is set to be zero for the compressional wave, or to be the angle appropriately above the critical angle of the compressional wave for the shear wave. Relative ultrasonic velocity variation (RUVV) due to applied stress is linear for all cases, and the effect of RUVV for the shear wave is larger than that for the compressional wave. Next, mechanical anisotropy of injected polypropylene (PP) plate and burned extruded porous machinable ceramic plate ane investigated by the similar inclined water immersion method. The relative ultrasonic velocity difference (RUVD) of the injected polypropylene plate ranges up to about 9%
社団法人日本音響学会の論文