岩石の引張疲労特性に関する研究
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概要
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In order to investigate the fatigue properties of rocks under cyclic stress, the fatigue test was carried out on four kinds of rocks : OGlNO tuff, KIMACHI sandstone, EMOCHI andesite and AKIYOSHI marble. The main results obtained in this study are summarized as follows : (1) The strain at the maximum stress increases gradually with the increasing cycles . There is no sign of approaching failure and the specimen failes abruptly. This behaviour may be explained by the failure form in tension where failure occurs normally in a direction perpendicular to the applied tensile stress. (2) The width of stress-strain hysteresis loop of rock under the cyclic tension has a tendency to narrow with the increasing cycles. (3) The S_r - N curves of OGlNO tuff, KIMACHI sandstone and EMOCHI andesite can be expressed by the experimental equation. As to the endurance limit of these rocks, the obtained values are about 69, 75 and 60% of tensile strength respectively. For AKIYOSHI marble, the S_r - N curve has not been presented clearly, and it is impossible to determine its experimental equation.
- 一般社団法人日本応用地質学会の論文
- 1991-06-10