Yuji Tanabe

J024024 Effects of Clinical Experiences on Eye Movements of Nurses

[No.13-1] 日本機械学会 2013 年度年次大会講演論文集 〔2013.9.8-11,岡山〕 J024024 看護師の臨床経験が眼球運動に及ぼす影響 川合 功,坂本 信, 定方 美恵子, 西方 真弓,小林 公一,小浦方 格, 笠井 美香子,井越 寿美子, 佐藤 富貴子, 西原 亜矢子,田邊 裕治 Effects of Clinical Experiences on Eye Movements of Nurses Ko KAWAI, Makoto SAKAMOTO, Mieko SADAKATA, Mayumi NISHIKATA, Koichi KOBAYASHI, Itaru KOURAKATA, Mikako KASAI, Sumiko IKOSHI, Fukiko SATO, Ayako NISHIHARA, Yuji TANABE *1 Graduate School of Science and Technology, Niigata University, 2-8050 Ikarashi, Niigata, 950-2181, Japan

The onset of crack growth in aluminium alloy due to impact tension.

The purpose of this paper is to confirm the effect of specimen length and the microstructure on the onset of precrack growth when an impact load is imposed on it. Impact, impact under static pretension and static tensile experiments were carried out using high strength aluminium alloy at 288 K and 77 K. The effect of specimen length on the critical condition for crack growth was discussed, based on the static stress intensity factor (K1)pre and the impact fracture stress σcd defined by the onset of crack growth. A linear relation between (K1)pre and Df which was a summation of (K1)pre and σcd√(πa), where a was a precrack length, could be seen and this relation was independent of specimen length and temperature. Microstructural aspects near the crack tip region were also observed on the fracture surfaces. The results of microscopic deformation measured by the X-ray micro beam diffraction method and the dislocation distribution observed by TEM showed that they were almost the same at the same temperature and were independent of loading type and specimen length. Comparing above results with our previous ones for steel specimens, it is concluded that the effect of specimen length on crack growth is negligiable in the case of impact fracture when the microscopic deformation behavior at a crack tip is insensitive to a rapid stress rise, which depends on specimen length.