長棒を用いたレーザ誘起衝撃応力の測定 : 歯質の窩洞形成時に生じる衝撃応力(機械要素,潤滑,設計,生産加工,生産システムなど)

概要

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In this paper, a measurement of the impulse stress induced by a laser irradiation on the extracted human enamel was proposed. The dynamic load induced in the specimen by using elastic wave propagation in the long bar made of aluminum alloy was measured. The human enamel was grinded with the grain of # 600, and fixed on the edge of the long bar. The titanium dioxide powder whose average diameter is 1 urn was applied to the enamel surface so as to absorb the irradiation laser beam effectively. The laser induced stress intensity was evaluated from the dynamic strain measured by small semiconductor strain gauges attached on the long bar. As a result, the impulse stress induced on the human enamel increased with increasing the laser energy, and related to the volume of the prepared cavity. The laser induced stress for the removal of the unit volume of human enamel was 0.03 Pa/mm<sup>3</sup>.
社団法人日本機械学会の論文
2009-10-25