| Gudehus-Bauer亚塑性本构模型研究 |
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| 引用本文： | 熊保林,邵龙潭.Gudehus-Bauer亚塑性本构模型研究[J].岩土力学,2006,27(Z1):175-178. |
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| 作者姓名： | 熊保林 邵龙潭 |
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| 作者单位： | 大连理工大学 工业装备结构分析国家重点实验室，大连 116024 |
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| 摘 要： | 无黏性土的应力-应变关系可以用Gudehus-Bauer亚塑性本构模型来模拟，该模型强调应力增量的大小和方向不仅与当前应力状态有关，而且还取决于当前应变增量的大小和方向。为分析其与传统弹塑性理论的不同之处，对Gudehus-Bauer理论的线性项和非线性项进行了研究，并对不同初始孔隙比下Gudehus-Bauer亚塑性模型的应力-应变关系进行了探讨。结果表明Gudehus-Bauer亚塑性模型不用把应变分为弹性和塑性部分就能考虑不可逆变形，并能体现密砂的剪胀特性和应变软化特性以及松砂的剪缩特性和应变硬化特性。
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| 关 键 词： | Gudehus-Bauer亚塑性模型 线性项 非线性项 孔隙比 |
| 收稿时间： | 2006-07-28 |
Research of Gudehus-Bauer hypoplastic constitutive model |
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| XIONG Bao-lin,SHAO Long-tan.Research of Gudehus-Bauer hypoplastic constitutive model[J].Rock and Soil Mechanics,2006,27(Z1):175-178. |
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| Authors: | XIONG Bao-lin SHAO Long-tan |
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| Institution: | State Key Laboratory of Structural Analysis of Industrial Equipments, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | The stress-strain relation of cohesionless soil can be modeled with Gudehus-Bauer hypoplastic constitutive model, in which the magnitude and direction of stress increment depend on not only the previous stress state, but also the bulk and direction of current strain increment. For analyzing differences between this model and traditional elastoplastic theory, the linear term and nonlinear term of Gudehus-Bauer model are investigated. The stress-strain relation of Gudehus-Bauer hypoplastic model in different original void ratios is discussed. The results show that Gudehus-Bauer hypoplastic model can consider irreversible deformation without recourse to decomposition of strain into elastic and plastic parts. This model can also embody dilatancy, strain-softening of dense sand and contraction, strain-hardening of loose sand. |
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| Keywords: | Gudehus-Bauer hypoplastic model linear term nonlinear term void ratio |
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