| 岩石试件尺寸效应的塑性剪切应变梯度模型 |
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| 引用本文： | 王学滨,潘一山,宋维源.岩石试件尺寸效应的塑性剪切应变梯度模型[J].岩土工程学报,2001,23(6):711-713. |
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| 作者姓名： | 王学滨 潘一山 宋维源 |
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| 作者单位： | 辽宁工程技术大学力学系；辽宁工程技术大学力学系 辽宁阜新123000；辽宁阜新123000； |
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| 摘 要： | 利用剪切应变梯度塑性理论 ,假设剪切带内部的岩石为剪切破坏 ,建立了单轴受压岩石试件尺寸效应的塑性剪切应变梯度模型 ,并模拟了剪切带倾角、参数k1和k2 对单轴受压岩石试件软化段应力 -应变关系的影响规律。局部化是尺寸效应的原因。
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| 关 键 词： | 单轴压缩 梯度塑性理论 剪切破坏 剪切应变 尺寸效应 应变局部化 |
| 文章编号： | 1000-4548(2001)06-0711-03 |
| 修稿时间： | 2001年3月22日 |
The model of plastic shear strain gradient on size effect in uniaxial compression of rock specimen |
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| WANG Xuebin,PAN Yishan,SONG Weiyuan.The model of plastic shear strain gradient on size effect in uniaxial compression of rock specimen[J].Chinese Journal of Geotechnical Engineering,2001,23(6):711-713. |
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| Authors: | WANG Xuebin PAN Yishan SONG Weiyuan |
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| Affiliation: | Dept. of Mechanics and Engineering Sciences Liaoning Technical Unive rsity Fuxin 123000 China |
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| Abstract: | Based upon shear strain gradient plastic theo ry of rock deformation localization,it is assumed that the failure pattern of ro ck in the shear bands is shear failure.A model of plastic shear strain gradient is obtained.Under the con dition of uniaxial compression of rock specimen,the inclination of shear band,p arameter k_1 and k_2 have an influence on the relationship of stress a nd strain in t he strain softening stage.The influence has been modeled.The results show that t he proposed model can be used in a wide range and the theoretical re sults are in a good agreement with many experimental results.Localization is th e reason for size effect. |
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| Keywords: | uniaxial compression strain gradient plastic theory shearing failure shear strain size effect localization |
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