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Micromechanical analysis of the behavior of stiffclay

ISSN号：0567-7718
期刊名称：《力学学报：英文版》
时间：0
分类：TU375[建筑科学—结构工程] TP391.9[自动化与计算机技术—计算机应用技术;自动化与计算机技术—计算机科学与技术]
作者机构：[1]Department of Civil Engineering, Shanghai Jiao Tong University, 200240 Shanghai, China, [2]Department of Civil and Environmental Engineering, University of Massachusetts, Amherst, MA 01002, USA, [3]Research Institute in Civil and Mechanical Engineering UMR CNRS 6183, Ecole Centrale de Nantes, BP 92101, 44321 Nantes, France
相关基金：The project was supported by the Shanghai Pujiang Talent People Project （11PJ1405700）, and the National Science Funds for Distinguished Young Scholars （51025932）.Acknowledgement Authors thank Prof. Ming-Jing Jiang at Tongji University for his support.

作者： Zhen-Yu Yin, Ching S. Chang, Pierre-Yves Hicher, Jian-Hua Wang

关键词：细观力学分析, 行为建模, 应力诱导各向异性, 模型开发, 压缩屈服应力, 硬粘土, 时间尺度, 粘接效果, Stiff clay , Destructuration , Micromechanics , Plasticity , Induced anisotropy

中文摘要：

在地质的 timescale 形成的硬化在各种各样的生硬泥土被观察。一个 micromechanical 压力紧张模型为在生硬泥土的变丑行为上为硬化的效果建模被开发。建议途径明确地在 intercluster 接触考虑硬化，它与传统的模型不同。内部簇的结合的概念被介绍说明另外的结合在砍滑动并且在正常压缩的一个更高的收益压力。为内部簇的结合的一条损坏法律在机械装载期间为 debonding 过程在簇接触被建议。模型被用来在 Vallericca 生硬泥土上模仿众多的压力路径测试。现在的模型的适用性通过比较在之间被评估预言并且测量结果。为了解释在内部簇的飞机从外部地应用的负担，本地压力的进化和本地紧张产生的导致压力的 anisotropy，被讨论。

英文摘要：

Cementations formed in geological timescale are observed in various stiff clays.A micromechanical stress strain model is developed for modeling the effect of cementation on the deformation behavior of stiff clay.The proposed approach considers explicitly cementations at intercluster contacts,which is different from conventional model.The concept of inter-cluster bonding is introduced to account for an additional cohesion in shear sliding and a higher yield stress in normal compression.A damage law for inter-cluster bonding is proposed at cluster contacts for the debonding process during mechanical loading.The model is used to simulate numerous stress-path tests on Vallericca stiff clay.The applicability of the present model is evaluated through comparisons between the predicted and the measured results.In order to explain the stress-induced anisotropy arising from externally applied load,the evolution of local stresses and local strains at inter-cluster planes are discussed.

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