不等轴双向拉伸无纺织物孔径变化理论研究

doi:10.16285/j.rsm.2017.12.026

›› 2017, Vol. 38 ›› Issue (12): 3597-3603.doi: 10.16285/j.rsm.2017.12.026

不等轴双向拉伸无纺织物孔径变化理论研究

唐琳¹，唐晓武²，孙凯^{3, 4}

1. 哈尔滨工业大学（威海）土木工程系，山东威海 264209；2. 浙江大学建筑工程学院滨海和城市岩土工程研究中心，浙江杭州310058； 3. 哈尔滨工业大学结构工程灾变与控制教育部重点实验室，黑龙江哈尔滨 150090；4. 哈尔滨工业大学土木工程学院，黑龙江哈尔滨 150090

收稿日期:2016-10-12 出版日期:2017-12-11 发布日期:2018-06-05
作者简介:唐琳，女，1986年生，博士，讲师，主要从事土工合成材料反滤性能方面的研究工作。
基金资助:
国家自然科学基金项目（No.51708160）；山东省自然科学基金项目（No.ZR2015PE006）；中央高校基本科研业务费专项资金资助（No.HIT.NSRIF.2017018）；哈尔滨工业大学（威海）校科学研究基金（No.HIT（WH）201423）

Analytical solutions for pore size of nonwoven geotextiles under unequal biaxial tensile strain

TANG Lin¹, TANG Xiao-wu², SUN Kai^{3, 4}

1. Department of Civil Engineering, Harbin Institute of Technology at Weihai, Weihai, Shandong 264209, China; 2. Research Center of Costal and Urban Geotechnical Engineering, College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, Zhejiang 310058, China; 3. Key Lab of Structures Dynamics Behavior and Control of Ministry of Education, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China; 4. School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China

Received:2016-10-12 Online:2017-12-11 Published:2018-06-05
Supported by:
This work was supported by the National Natural Science Foundation of China (51708160), the Shandong Provincial Natural Science Foundation, China (ZR2015PE006), the Fundamental Research Funds for the Central Universities(HIT.NSRIF.2017018) and the Scientific Research Foundation of Harbin Institute of Technology at Weihai (HIT(WH)201423).

摘要/Abstract

摘要： 无纺织物反滤排水应用常处于不等轴双向受拉状态，拉应变引起无纺织物孔径变化，易导致反滤性能失效。基于现有两种体系的无纺织物孔径参数理论解，推导不等轴双向拉应变状态下无纺织物的等效孔径理论解、及孔径分布曲线变化理论解PSDbi。采用前人等轴双向拉伸孔径试验数据，对比两种理论解对该试验的计算结果，并试算不等轴拉应变下两种理论解的预测结果。研究结果表明，PSDbi理论解能预测等轴双向拉应变下孔径分布曲线的变化，不等轴双向拉应变下PSDbi理论解的预测结果取决于方向参数Ka及应变值的大小。对等轴双向拉应变下O95变化斜率的预测，理论解较准确，PSDbi理论解计算结果偏大。理论解对于较厚无纺织物的O95数值预测较为准确，对较薄织物预测结果偏小。以上误差与单向拉应变下两类体系公式的误差规律一致，该误差与模型的理论基础相关。

关键词: 无纺织物, 不等轴双向拉应变, O95, 孔径分布曲线, 理论解

Abstract: Nonwoven geotextiles are typically subjected to unequal biaxial tension in filtration applications, which changes the pore sizes, and can easily cause the failure of material. This work investigates the analytical solutions for the equivalent pore size and pore size distributions (PSDbi) subjected to unequal biaxial tensile strains. The experimental data collected from two nonwoven geotextiles under equal biaxial tensile strains are compared with the analytical solutions. The analytical variations of the pore size parameters under unequal biaxial tensile strain are calculated. It is concluded that the changes in analytical PSDbi depends on the tensile strains and the directional parameter Ka. The experimental PSD curves under equal biaxial tensile strains correspond with the analytical predictions. For changes in O95, the solution predicts more accurately than the PSDbi solution. The solution predicts more accurately for the thicker nonwoven geotextiles. The same conclusion can be drawn from the results under uniaxial tensile strains in the literatures.

Key words: nonwoven geotextiles, unequal biaxial tensile strain, O95, pore size distributions, analytical solutions

中图分类号:

TU 443

唐琳，唐晓武，孙凯, . 不等轴双向拉伸无纺织物孔径变化理论研究[J]. , 2017, 38(12): 3597-3603.

TANG Lin, TANG Xiao-wu, SUN Kai, . Analytical solutions for pore size of nonwoven geotextiles under unequal biaxial tensile strain[J]. , 2017, 38(12): 3597-3603.

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不等轴双向拉伸无纺织物孔径变化理论研究

Analytical solutions for pore size of nonwoven geotextiles under unequal biaxial tensile strain

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