| 水泥基材料在宽围压范围的本构模型 |
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| 引用本文： | 张研,邵建富.水泥基材料在宽围压范围的本构模型[J].固体力学学报,2011,32(3):293-298. |
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| 作者姓名： | 张研 邵建富 |
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| 作者单位： | 1. 河海大学2. |
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| 基金项目： | 国家自然科学基金，中央高校基本科研业务费专项，河海大学引进人才启动基金 |
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| 摘 要： | 本文首先进行了水泥石的三轴试验和静水试验，根据试验结果分析了宽围压范围下不同力学机理对水泥石宏观力学性能的影响。提出了基于热力学定律的剪切塑性、孔隙塑性与破坏准则相互作用的弹塑性损伤本构模型。该模型有效的考虑了围压对材料主要力学特征的影响，提出了与损伤准则相关联的塑性硬化函数。数值解答与试验结果比较表明，该本构模型可以很好地描述水泥石在低围压状态下的脆性、中围压下的脆-塑性转换以及高围压下的孔隙塑性为主的力学特征。
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| 关 键 词： | 水泥基材料 宽围压范围 本构关系 塑性机理 损伤准则 |
| 收稿时间： | 2009-11-16 |
A CONSTITUTIVE LAW OF CEMENT-BASED MATERIAL AT LARGE RANGE OF CONFINING PRESSURE STATE |
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| Yan Zhang,Jianfu Shao.A CONSTITUTIVE LAW OF CEMENT-BASED MATERIAL AT LARGE RANGE OF CONFINING PRESSURE STATE[J].Acta Mechnica Solida Sinica,2011,32(3):293-298. |
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| Authors: | Yan Zhang Jianfu Shao |
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| Abstract: | The triaxial compression test and hydrostatic compression test have been performed at first. Based on the experimental data, different mechanism of cement paste has been analyzed. According to thermodynamics theory, a new constitutive law is established and the damage criterion, two plastic mechanisms have been taken into account. This modelling considers also the influence of confining pressure. Numerical simulation shows that this constitutive law for cement-based materials can well explicit the main mechanical behavior at a large range of confining pressure state. |
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