| 基于细观力学分析的砂土弹塑性本构模型 |
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| 引用本文： | 徐辉,王靖涛,张光永.基于细观力学分析的砂土弹塑性本构模型[J].固体力学学报,2006,27(3):249-254. |
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| 作者姓名： | 徐辉 王靖涛 张光永 |
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| 作者单位： | 华中科技大学土木工程与力学学院,武汉,430074 |
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| 摘 要： | 利用细观力学分析中的自洽理论建立了在固结排水条件下的砂土弹塑性本构模型,在该模型中考虑了部分砂土颗粒因剪切作用在颗粒接触面滑移而引起的整体剪切模量的降低,给出了求解整体剪切模量的解析方法,并将模型预测与不同应力路径的试验结果作了比较,证明该模型是合理的.
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| 关 键 词： | 砂土 细观力学 自洽方法 滑移 本构模型 |
| 修稿时间： | 2005年7月25日 |
AN ELASTIC-PLASTIC CONSTITUTIVE MODEL FOR SAND BASED ON MICROMECHANICS METHOD |
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| Xu Hui,Wang Jingtao,Zhang Guangyong.AN ELASTIC-PLASTIC CONSTITUTIVE MODEL FOR SAND BASED ON MICROMECHANICS METHOD[J].Acta Mechnica Solida Sinica,2006,27(3):249-254. |
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| Authors: | Xu Hui Wang Jingtao Zhang Guangyong |
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| Abstract: | A micromechanical analysis of the shear behavior of saturated sand in the consolidated drained condition is presented.The non-linear macroscopic shear response of the saturated sand is assumed to be related to the existence of a sliding phase in the sand skeleton.Using self-consistent method,the non-linearity of the overall shear response is shown to be controlled by the volume fraction and the shear modulus decrease of the sliding phase.The consequences of this hypothesis on the non-linear overall response are illustrated and comparisons are made with experimental date under two stress paths. |
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| Keywords: | sand micromechanics self-consistent method sliding phase constitutive model |
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