| 高应力准一维应变下细砂本构关系实验测定 |
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| 引用本文： | 熊益波,王春明,赵康.高应力准一维应变下细砂本构关系实验测定[J].岩土力学,2010,31(Z1):216-219. |
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| 作者姓名： | 熊益波 王春明 赵康 |
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| 作者单位： | 西北核技术研究所，西安 710024 |
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| 摘 要： | 为掌握松散细砂在宽广应力范围下的压缩本构特性，采用准一维应变装置进行了最高轴向应力达1 100 MPa的实验研究。测得了一种细砂在烘干状态和含水率为3.4%、6.6%和13.5%的压缩下应力-应变曲线，拟合了不同含水率细砂准一维应变压缩下的统一形式的经验型本构方程。比较了实测数据与AUTODYN程序材料数据库数据，给出了使用DYNA程序计算需要的细砂参数推荐数据。高应力水平下的实测数据对工程定量计算具参考价值，拟合的经验公式可在对不同含水率细砂的具体工程计算中推广使用。
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| 关 键 词： | 细砂 准一维应变 高应力 本构关系 |
| 收稿时间： | 2010-04-10 |
Experimental tests on constitutive relation of fine sand under high stress and quasi one-dimensional strain |
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| XIONG Yi-bo,WANG Chun-min,ZHAO Kang.Experimental tests on constitutive relation of fine sand under high stress and quasi one-dimensional strain[J].Rock and Soil Mechanics,2010,31(Z1):216-219. |
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| Authors: | XIONG Yi-bo WANG Chun-min ZHAO Kang |
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| Institution: | Northwest Institute of Nuclear Technology, Xi’an 710024, China |
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| Abstract: | In order to comprehend constitutive characteristics of incompact fine sand under compression stress in wide range, experimental tests were performed on a kind of fine sand with testing apparatus of quasi-one-dimensional strain with axial stress up to 1 100 MPa. The stresses related strains of fine sand with water contents of 3.4%, 6.6% and 13.5% were obtained; besides that of dried sand. Based on the test results, empirical constitutive equation is presented as a unifiable form for the fine sand with different water contents under quasi one-dimensional compression. The experimental test data are compared with the data from AUTODYN code. The constitutive parameters of fine sand are recommended, which are indispensable to calculating in DYNA code. The presented experimental test data, acquired under high stress in wide range, can be used for quantitative calculation, and the related empirical formula is applicable for engineering calculation on fine sand with different water contents. |
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| Keywords: | fine sand quasi one-dimensional strain high stress constitutive relation |
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