| 基于广义Kelvin模型的三维流变损伤本构模型 |
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| 引用本文： | 李佳珑,徐卫亚,王如宾. 基于广义Kelvin模型的三维流变损伤本构模型[J]. 三峡大学学报(自然科学版), 2013, 35(1): 54-57 |
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| 作者姓名： | 李佳珑 徐卫亚 王如宾 |
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| 作者单位： | 1. 河海大学岩土工程科学研究所,南京 210098;河海大学岩土力学与堤坝工程教育部重点实验室,南京 210098
2. 河海大学岩土力学与堤坝工程教育部重点实验室,南京,210098 |
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| 基金项目： | 国家科技支撑计划(2012BAK03B04);国家自然科学基金(11172090和51209075) |
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| 摘 要： | 岩石加速流变阶段蠕变损伤引起的附加蠕变是导致岩石破坏加快的重要原因．以一维广义Kelvin体应力应变关系为基础，推演三维流变本构方程，并引入Kaehanov损伤演化方程，建立了基于广义Kelvin模型的三维流变损伤本构模型．通过对花岗片麻岩三轴流变试验结果的模拟，验证了该模型的有效性．结果表明：基于广义Kelvin模型的流变损伤本构模型可以反映花岗片麻岩的减速蠕变和等速蠕变过程，并且可较理想地反映加速蠕变过程．
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| 关 键 词： | 广义Kelvin模型 流变试验 流变损伤 本构模型 花岗片麻岩 |
3D Rheological Damage Constitutive Model Based on Generalized Kelvin Model |
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| Li Jialong , Xu Weiya , Wang Rubin. 3D Rheological Damage Constitutive Model Based on Generalized Kelvin Model[J]. Journal of China Three Gorges University(Natural Sciences), 2013, 35(1): 54-57 |
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| Authors: | Li Jialong Xu Weiya Wang Rubin |
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| Affiliation: | 1.Geotechnical Research Institute,Hohai Univ.,Nanjing 210098,China;2.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai Univ.,Nanjing 210098,China) |
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| Abstract: | The additional creep caused by damage in tertiary creep state is one of the reasons what lead the rock to fast destroy. Based on three-dimensional generalized Kelvin rheological model which is developed by one-dimensional generalized Kelvin rheologieal model, and the Kachanov damage evolution law, a three-dimensional rheologieal damage constitutive model is established. The validity of the model is verified by the triaxial compression creep test on granitic gneiss. The results show that the rheologieal damage model can not only describe the primary and secondary creep states of rock, but also reflect the damage process of rock in tertiary creep state. |
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| Keywords: | generalized Kelvin model rheological test rheological damage constitutive model granitic gneiss |
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