| 岩石三点弯曲圆梁断裂韧度KIC的测试研究 |
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| 引用本文： | 王启智,鲜学福.岩石三点弯曲圆梁断裂韧度KIC的测试研究[J].重庆大学学报(自然科学版),1992,15(5):101-106. |
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| 作者姓名： | 王启智 鲜学福 |
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| 作者单位： | 重庆大学资源及环境工程系
(王启智)，重庆大学资源及环境工程系(鲜学福) |
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| 摘 要： | 用两种3点弯曲圆梁(分别具有人字形切槽和直切槽)测定了一种重庆灰岩的断裂韧度K。测试结果表明:前者比后者在防止过载,避免裂纹扩展偏斜,考虑非线性修正等方面有若干优点,但测试值的尺寸效应尚有待解决。
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| 关 键 词： | 岩石 断裂韧度 三点变曲圆梁 测试 |
AN INVESTIGATION FOR TESTING ROCK FRACTURE TOUGHNESS WTH THREE-POINT BEND ROUND BARS |
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| Wang Qizhi Xian Xuefu.AN INVESTIGATION FOR TESTING ROCK FRACTURE TOUGHNESS WTH THREE-POINT BEND ROUND BARS[J].Journal of Chongqing University(Natural Science Edition),1992,15(5):101-106. |
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| Authors: | Wang Qizhi Xian Xuefu |
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| Institution: | Wang Qizhi Xian Xuefu |
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| Abstract: | Chevron-notched and straight-through-notched three-point bend round bars are used to test fracture toughness K of a Chongqing limestone. The results show that the former specimen has some advantages over the latter in the aspects of preventing overload,avoiding deviation of crack growth from notch plane and considering nonlinear correction in calculation,etc. However,the size effects of test values are to be solved. |
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| Keywords: | rock fracture toughness three-point bend round bar chevron notch straight-through notch Stable crack growth size effects |
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