| 岩土流动势的存在性及解耦性 |
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| 引用本文： | 周家伍,刘元雪,陆新,郑颖人.岩土流动势的存在性及解耦性[J].岩土力学,2012,33(2):375-381. |
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| 作者姓名： | 周家伍 刘元雪 陆新 郑颖人 |
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| 作者单位： | 后勤工程学院 军事建筑工程系，重庆 401311 |
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| 基金项目： | 国家自然科学基金(No.50979112);重庆市自然科学基金(No.CSTC,2008BB6144) |
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| 摘 要： | 基于不可逆热力学岩土损伤理论的流动势理论存在两个基本问题：（1）岩土材料是否存在流动势；（2）流动势可否分解为塑性势和损伤势，即塑性、损伤两种机制可否解耦，给出了流动势存在的充分必要条件并加以严格证明，结合岩土的基本变形性质，证明了岩土不存在流动势。进一步考察流动势的解耦性，给出了流动势的塑性流动与损伤流动可解耦的充分必要条件，并进行了严格论证，结合土体的基本变形性质，证明了岩土塑性流动和损伤流动机制不可解耦，从而也为其他固体材料流动势的存在性和解耦性提供判别依据。
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| 关 键 词： | 岩土材料 本构关系 不可逆热力学 损伤 流动势 |
| 收稿时间： | 2010-12-07 |
Existence and decoupling for flow potential of geomaterials |
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| ZHOU Jia-wu
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LIUYuan-xue
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LU Xin
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ZHENG Ying-ren.Existence and decoupling for flow potential of geomaterials[J].Rock and Soil Mechanics,2012,33(2):375-381. |
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| Authors: | ZHOU Jia-wu LIUYuan-xue LU Xin ZHENG Ying-ren |
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| Institution: | Department of Architecture & Civil Engineering, Logistical Engineering University, Chongqing 401311, China) |
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| Abstract: | Based on irreversible thermodynamics,the paper elaborates two fundamental constitutive issues:(1) existence or inexistence of the flow potential;(2) the flow potential can or cannot be decomposed into a damage potential and a plastic potential,namely,whether the two mechanisms can be decoupled.Within this framework,sufficient and necessary condition for the existence and the decoupling of the flow potential are given,and they are strictly proved in theory.According to the mechanical property of the geomaterial,the inexistence and the un-decoupling of the flow potential are also proved;meanwhile,it is shown that the existence and decoupling of other solid materials can theoretically be obtained from the two fundamental theories. |
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| Keywords: | geomaterial constitutive relation irreversible thermodynamics damage flow potential |
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