| 岩石单轴压缩应变梯度损伤模型局部化带宽 |
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| 引用本文： | 赵扬锋,潘一山.岩石单轴压缩应变梯度损伤模型局部化带宽[J].辽宁工程技术大学学报(自然科学版),2006,25(3):355-357. |
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| 作者姓名： | 赵扬锋 潘一山 |
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| 作者单位： | 辽宁工程技术大学,力学与工程科学系,辽宁,阜新,123000 |
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| 基金项目： | 国家自然科学基金重大项目资助(50490275)。 |
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| 摘 要： | 采用基于各向同性应变梯度损伤模型，在平衡方程中引入高阶应力项和损伤内变量，对单轴压缩作用下岩石变形局部化进行了研究，得到了单轴压缩作用下岩石变形局部化带宽度的一维解析解，给出了岩石试件局部化带的宽度公式，对岩石变形局部化带宽度与损伤内变量的关系进行了分析，为实验测定内部材料长度参数提供了理论依据。岩石试件局部化带的宽度不仅与材料的内部长度参数有关，而且还与损伤内变量（材料的脆塑性）有关。对于塑性材料，局部化带宽度就大；对于脆性材料，局部化带宽度就小。
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| 关 键 词： | 单轴压缩 局部化 应变梯度损伤模型 高阶应力 |
| 文章编号： | 1008-0562(2006)03-0355-03 |
| 修稿时间： | 2004年7月12日 |
Width of localization band of strain-gradient-enhanced damage model for rock on uniaxial compression |
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| ZHAO Yang-feng,PAN Yi-shan.Width of localization band of strain-gradient-enhanced damage model for rock on uniaxial compression[J].Journal of Liaoning Technical University (Natural Science Edition),2006,25(3):355-357. |
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| Authors: | ZHAO Yang-feng PAN Yi-shan |
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| Abstract: | Based on isotropic strain-gradient-enhanced damage model, high-order stress and inner variable of damage are introduced by equilibrium equation; localization of deformation for rock on uniaxial compression is studied. The one-dimensional analytical solution of width of localization band is established, the formula of width of localization band is given, the relation of width of localization band and inner variable of damage is analyzed. The theoretical foundation for measuring the internal length of rock on the experiment is given. The width of localization band is related to not only the internal length of rock but also to inner variable of damage (material brittle-plastic). As to plastic material, the width of localization band is large; as to fragile material, the width of localization band is small. |
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| Keywords: | uniaxial compression localization strain-gradient-enhanced damage model high-order stress |
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