| 煤体变形局部化的梯度塑性理论研究 |
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| 引用本文： | 宋义敏,董 平,潘一山.煤体变形局部化的梯度塑性理论研究[J].华北航天工业学院学报,2001(4). |
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| 作者姓名： | 宋义敏 董 平 潘一山 |
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| 作者单位： | 华北航天工业学院建筑工程系
(宋义敏，董 平)，辽宁工程技术大学力学与工程科学系(潘一山) |
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| 摘 要： | 摘 要 本文采用白光数字散斑相关方法对煤在单轴压缩下变形破坏进行研究，定量的测出了煤的变形局部化带宽度。并通过应变梯度塑性理论，在屈服函数中引入应变梯度二阶项。采用Drucker－Prager准则解析得出了煤试件的变形局部化带宽度公式并根据试验确定煤的材料内部长度。
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| 关 键 词： | 变形局部化 梯度塑性 白光数字散斑 内部长度参数 |
Study of The Theory of Deformation - Failur Localization For Coal |
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| Song Yimin,Dong Ping Construction Engineering.Study of The Theory of Deformation - Failur Localization For Coal[J].Journal of North China Institute of Astronautic Engineering,2001(4). |
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| Authors: | Song Yimin Dong Ping Construction Engineering |
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| Abstract: | Abstract This paper studies the deformation - failure of coal by means of white light digital speckle correlation method to measure the localization band width of coal deformation quantitatively. According to the gradient plasticity theory, we introduced two- class strain gradient into yield function, derived from the formula of deformation localization band width by using Drucker - Prager yield criterion and gave the internal length of coal. |
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| Keywords: | Localization change Gradient plasticity White light digital speckle Internal length |
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