| A criterion for crack initiation and propagation in intact rocks under creep condition |
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| 作者姓名： | 陈有亮 孙钧 |
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| 作者单位： | [1]DepartmentofCivilEagineering,ShanghaiUniversity,Shanghai200072 [2]DepartmentofGeotechnkalEngineering,TongjiUniversity,Shanghai200092,China |
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| 基金项目： | SupportedbytheNationalNaturalScienceFoundationofChina (5 0 2 790 18,59809005)andtheNaturalScienceFoundationofShanghai(0 2ZF14 0 3 6) |
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| 摘 要： | This paper presents a study on the criterion of crack initiation and propagation under creep conditions, which were investigated using specimens collected from outcropped sandstone rock formations. Beam specimens under three points bending were used in this investigation. The experimental result shows that due to creep deformation, rock crack will inevitably initiate and propagate after a time interval of sustained loading under a load of K1, which is less than fracture toughness KIC but not less than a constant marked as KIC2. KIC2 indicates the ability of rock to resist crack initiation and propagation under creep conditions and it is defined as creep fracture toughness.
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| 关 键 词： | 地质现象 爆裂 沙岩 传播 岩石构成 |
A criterion for crack initiation and propagation in intact rocks under creep condition |
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| CHEN You liang ,SUN Jun.A criterion for crack initiation and propagation in intact rocks under creep condition[J].Journal of Coal Science & Engineering(China),2003,9(2):1-4. |
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| Authors: | CHEN You liang SUN Jun |
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| Affiliation: | CHEN You liang 1,SUN Jun 2 |
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| Abstract: | This paper presents a study on the criterion of crack initiation and propagation under creep conditions, which were investigated using specimens collected from outcropped sandstone rock formations. Beam specimens under three points bending were used in this investigation. The experimental result shows that due to creep deformation, rock crack will inevitably initiate and propagate after a time interval of sustained loading under a load of K I , which is less than fracture toughness K IC but not less than a constant marked as K IC2 . K IC2 indicates the ability of rock to resist crack initiation and propagation under creep conditions and it is defined as creep fracture toughness. |
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| Keywords: | crack initiation and propagation sandstone creep |
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