材料
Online ISSN : 1880-7488
Print ISSN : 0514-5163
ISSN-L : 0514-5163
ダブルトーション法による岩石内のクラック進展現象の異方性に関する実験的研究
佐野 修
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ジャーナル フリー

1988 年 37 巻 413 号 p. 152-158

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A subcritical crack growth due to stress corrosion has been identified as a source of time-dependent fracture of rocks in brittle fields. The stress corrosion cracking was investigated in humid air by using the double-torsion technique for three rocks of different origin, Murata basalt, Oshima granite and Ogino tuff. The subcritical crack growth was found to be strongly dependent on the directions of crack opening and crack propagation. The maximum growth rate was higher by several orders of magnitude than the minimum one for the same rock. The anisotropy in the crack propagation was controlled by microcracks for Oshima granite and by the fabric for other rocks.

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