| 真三轴应力状态下岩石损伤本构模型 |
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| 引用本文： | 张慧梅,谢祥妙,张蒙军,杨更社.真三轴应力状态下岩石损伤本构模型[J].力学与实践,2015,37(1):75-78. |
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| 作者姓名： | 张慧梅 谢祥妙 张蒙军 杨更社 |
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| 作者单位： | 1. 西安科技大学力学系, 西安 710054;
2. 西安科技大学建筑与土木工程学院, 西安 710054 |
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| 基金项目： | 国家自然科学基金(11172232,41272340);陕西省自然科学基金(2011JM1003);教育部新世纪人才支持计划(ACET-12-1044);陕西省教育厅专项基金(11JK0525)资助项目 |
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| 摘 要： | 从岩石微元破坏服从Weibull 随机分布的特点出发,建立了真三轴应力状态下岩石损伤软化统计本构关系;根据应力应变关系的几何条件,建立了本构模型参数与岩石变形过程中应力应变曲线特征参量的理论关系,从而增强了模型的适应性;最后通过试验实测数据验证了模型的合理性.
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| 关 键 词： | 真三轴应力状态 Weibull随机分布 Drucker-Prager准则 本构关系 |
| 收稿时间： | 2013-12-10 |
DAMAGE CONSTITUTIVE MODEL OF ROCK UNDER THE TRUE TRIAXIAL CONFINEMENT STATE |
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| ZHANG Huimei,XIE Xiangmiao,ZHANG Mengjun,YANG Gengshe.DAMAGE CONSTITUTIVE MODEL OF ROCK UNDER THE TRUE TRIAXIAL CONFINEMENT STATE[J].Mechanics and Engineering,2015,37(1):75-78. |
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| Authors: | ZHANG Huimei XIE Xiangmiao ZHANG Mengjun YANG Gengshe |
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| Institution: | 1. Department of Mechanics, Xi'an University of Science and Technology, Xi'an 710054, China;
2. College of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an 710054, China |
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| Abstract: | With the assumption that the rock micro-unit failure obeys the Weibull random distribution, the damage softening statistical constitutive relations are established under the true triaxial confinement state. Then, according to the geometrical conditions of the stress-strain relationship, the theoretical relationship between the constitutive model parameters and the stress-strain curve characteristic parameters during the process of rock softening and deforming is established, which enhances the adaptability of the model. Finally, the rationality of the model is verified by the measured data. |
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| Keywords: | true triaxial stress state Weibull random distribution Drucker-Prager criterion constitutive relation |
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