| 岩土本构理论的几个基本问题研究 |
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| 引用本文： | 刘元雪. 岩土本构理论的几个基本问题研究[J]. 岩土工程学报, 2001, 23(1): 45-48 |
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| 作者姓名： | 刘元雪 |
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| 作者单位： | 后勤工程学院土木工程系!重庆400041； |
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| 摘 要： | 从岩土基本力学性质出发 ,证明了Drucker塑性公设、经典塑性力学原理不适用于岩土材料。对岩土本构理论的几个基本问题进行了研究。通过严格的理论分析 ,证明了基于经典塑性理论的单屈服面模型无论是否采用相关联流动法则都是不适用于岩土材料的 ;岩土屈服面不唯一 ,屈服面重数与塑性应变增量自由度一致 ,岩土屈服面存在不外凸情况 ;相关联流动法则不适用于岩土材料
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| 关 键 词： | 本构关系 岩土材料 经典塑性理论 Drucker公设 屈服面 流动法则 |
| 文章编号： | 1000-4548(2001)01-0045-04 |
| 修稿时间： | 2000-07-18 |
Study of several basic problems in constitutive theory of geomaterials |
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| LIU Yuan-xue. Study of several basic problems in constitutive theory of geomaterials[J]. Chinese Journal of Geotechnical Engineering, 2001, 23(1): 45-48 |
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| Authors: | LIU Yuan-xue |
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| Affiliation: | Department of Civil Engineering Logistical Engineering University Chongqing 400041 China |
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| Abstract: | WT5”B1]Based on the basic mechanical properties of geomaterials,it is proved that Drucker postulate and the classical mechanics of plasticity are not suitable for geomaterials.The basic problems of constitutive theory of geomaterials are discussed.Based on strict theoretic analysis,the following have been verified:the single yield surface model which is based on classic theory of plasticity would be unsuitable to geomaterials whether the associated flow rule is applied or not;the yield surface of geomaterials would not be unique,and its number will be same as that of the freedoms of plastic strain increment;and the yield surface might not be convex;and the associated flow rule is unsuitable to geomaterials.LIUYuan xue(DepartmentofCivilEngineerin |
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| Keywords: | WT5”B1]constitutive relation geomaterials classical plastic theory Drucker Postulate yield surface flow rull |
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