| Modeling of state parameter and hardening function for granular materials |
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| 作者姓名： | 彭芳乐 李建中 |
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| 作者单位： | [1]DepartmentofGeotechnicalEngineering,TongjiUniversit;,Shanghai200092,China [2]SchoolofGeoscienceandEnvironmentEngineering,CentralSouthUniversity,Changsha410083,China |
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| 基金项目： | ProjectsupportedbytheAssociationofInternationalEducationofJapan |
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| 摘 要： | A modified plastic strain energy as hardening state parameter for dense sand was proposed, based on the results from a series of drained plane strain tests on saturated dense Japanese Toyoura sand with precise stress and strain measurements along many stress paths. In addition, a unique hardening function between the plastic strain en--ergy and the instantaneous stress path was also presented, which was independent of stress history. The proposed state parameter and hardening function was directly verified by the simple numerical integration method. It is shown that the proposed hardening function is independent of stress history and stress path and is appropriate to be used as the hardening rule in constitutive modeling for dense sand, and it is also capable of simulating the effects on the de-formation characteristics of stress history and stress path for dense sand.
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| 关 键 词： | 岩体力学 淬水 改良塑性应变力 应力过程 |
| 收稿时间： | 15 April 2003 |
| 修稿时间： | 24 June 2003 |
Modeling of state parameter and hardening function for granular materials |
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| Peng Fang-le,and Li Jian-zhong.Modeling of state parameter and hardening function for granular materials[J].Journal of Central South University of Technology,2004,11(2):176-179. |
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| Authors: | Peng Fang-le and Li Jian-zhong |
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| Affiliation: | (1) Department of Geotechnical Engineering, Tongji University, 200092 Shanghai, China;(2) School of Geoscience and Environment Engineering, Central South University, 410083 Changsha, China;(3) Department of Civil Engineering, University of Tokyo, 113 Tokyo, Japan |
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| Abstract: | A modified plastic strain energy as hardening state parameter for dense sand was proposed, based on the results from a series of drained plane strain tests on saturated dense Japanese Toyoura sand with precise stress and strain measurements along many stress paths. In addition, a unique hardening function between the plastic strain energy and the instantaneous stress path was also presented, which was independent of stress history. The proposed state parameter and hardening function was directly verified by the simple numerical integration method. It is shown that the proposed hardening function is independent of stress history and stress path and is appropriate to be used as the hardening rule in constitutive modeling for dense sand, and it is also capable of simulating the effects on the deformation characteristics of stress history and stress path for dense sand. |
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| Keywords: | sand modified plastic strain energy hardening function stress-history stress-path |
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