基于CT技术和有限元方法的沥青混合料虚拟劈裂试验研究

王   聪; 郭乃胜; 赵颖华; 谭忆秋

doi:10.16411/j.cnki.issn1006-7736.2013.02.017

大连海事大学学报 >

2013 , Vol. 39 >Issue 2: 128 - 132

DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2013.02.017

交通运输工程

基于CT技术和有限元方法的沥青混合料虚拟劈裂试验研究

王聪 ,
郭乃胜 ,
赵颖华 ,
谭忆秋

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1. 大连海事大学道路与桥梁工程研究所，辽宁大连116026；2. 辽宁省公路工程重点实验室，辽宁大连116026;3. 哈尔滨工业大学交通科学与工程学院，哈尔滨150090

王聪（1987-），男，博士生，E-mail: lnwangcong@163.com. 赵颖华（1954-），女，教授，博士生导师，E-mail: yhzhao@dlmu.edu.cn.

收稿日期: 2012-12-10

网络出版日期: 2023-05-25

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Simulation splitting test of asphalt mixture based on X-ray computer technique and finite element method

WANG Cong ,
GUO Nai-sheng ,
ZHAO Ying-hua ,
TAN Yi-qiu

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1. Institute of Road and Bridge Engineering, Dalian Maritime University, Dalian 116026, China; 2. Key Laboratory of Highway Engineering of Liaoning Province, Dalian 116026, China; 3. School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, China

Received date: 2012-12-10

Online published: 2023-05-25

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摘要

为弄清劈裂荷载条件下，沥青混合料试件内部的应力分布状态，基于X-ray CT技术、数字图像处理技术和有限元方法建立二维非均质数值模型，分析通过试件中心的垂直方向与水平方向路径条件下不同位置截面的内部应力分布情况，并与均质模型内部应力进行比较.结果表明，与均质模型不同，不同位置截面的非均质模型内部应力峰值没有出现在模型中心处，而是分布在试件中部呈现多峰值状态且较好地反应各个组分的力学行为；在分析路径上，不同位置截面的非均质模型应力分布趋势相同，但应力峰值出现的位置以及应力最大值均存在差异，说明试验截面的选取对二维虚拟试验结果影响较大.

关键词： 道路工程; 劈裂试验; X-ray CT; 沥青混合料; 数字图像

本文引用格式

王聪 , 郭乃胜 , 赵颖华 , 谭忆秋 . 基于CT技术和有限元方法的沥青混合料虚拟劈裂试验研究[J]. 大连海事大学学报, 2013 , 39(2) : 128 -132 . DOI: 10.16411/j.cnki.issn1006-7736.2013.02.017

Abstract

To analyze stress distribution in asphalt mixture internal structure under splitting load condition, two-dimension heterogeneous numerical models are established based on X-ray computed technique, digital image processing and finite element method to study stress distribution in different sections under the path of vertical direction and horizontal direction of asphalt mixture specimen, and internal structure stress of the heterogeneous model and homogeneous model. Comparison results show that unlike homogeneous model, the peak value of internal stress of heterogeneous model at different sections is not shown in the middle of the model, but is distributed in the central parts of the model which exhibits multi-peak value condition, moreover, it reflects mechanics behaviors of different components of asphalt mixtures. The stress distribution trend of heterogeneous models at different sections is identical on analysis path, but there are differences at the position of peak value and the maximum value of internal stress. Therefore, the selection of section has great impact on the result of the two-dimension simulation test.

Key words： road engineering; splitting test; X-ray computed technique (CT); asphalt mixture; damage; digital image

参考文献

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