巨視的にみた単結晶氷試験片の破断面様相に及ぼす結晶軸方位の影響

概要

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The effect of the direction of the crystal axis (C-axis) on macrofractography of single-crystal ice specimens was investigated by means of the SEN bending test at -10℃. The loading rate K^^._I was about 200 kPa√<m>/s, Four types of single-crystal ice specimens, in which the C-axis direction of the crystal was placed at an angle θ of 0°, 45°(I), 45°(II) and 90°, respectively, to the notch plane, were used. The edge notch was made by pressing the edge of a razor blade on the bottom of the saw-cut slot. A macroreplica was made on one side of the fracture surface, using dental impression material. The C-axis direction was measured from the surface of the other side by the etch pit method. Macroreplicas clearly showed that the aspects of fracture surfaces were affected by the C-axis direction and that the fracture surface contained many traces of crack extension along the basal plane {0001} or the prismatic plane {101^^-0}.
一般社団法人日本機械学会の論文
1991-05-25