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沥青混合料劈裂试验的细观有限元模拟与测试
Microcosmic finite element simulation and test of the splitting test of asphalt mixture
投稿时间: 2017-02-23  最后修改时间: 2017-04-27
DOI:
中文关键词:  道路工程,沥青混合料,马歇尔劈裂试验,细观有限元分析,细观光学试验,应变响应
英文关键词:road engineering  asphalt mixture  Marshall splitting test  microcosmic finite element analysis  microcosmic optical test  strain response
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目);交通运输部科技项目(2015319811320)
作者单位E-mail
付军 武汉理工大学 fjgrant@whut.edu.cn 
刘洁 武汉理工大学 jie_liu@whut.edu.cn 
雷力 武汉理工大学  
马晓东 武汉理工大学  
刘智鸿 武汉理工大学  
摘要点击次数: 89
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中文摘要:
      为分析沥青混合料的细观尺度破坏机理,采用数字图像技术将AC-25沥青混合料离散为集料、联结料、孔隙三相复合材料,基于ANSYS软件建立马歇尔试件的二维细观有限元模型,输入各相介质的力学参数,虚拟细观劈裂破坏试验。基于非接触式光学方法,测试AC-25马歇尔试件劈裂试验中各相介质应变,并与虚拟细观有限元分析结果进行对比。结果表明虚拟细观分析的各相介质参数影响较大,细观光学应变测试结果大于虚拟细观分析结果,但虚拟细观应变响应与光学测试结果规律相似,两种分析中沥青混合料破坏的薄弱环节均为联结料与界面。
英文摘要:
      To analyze the micro-scale failure mechanism of asphalt mixture, the AC-25 asphalt mixture was divided into three-phase composite materials by using the digital image technology, which were aggregate, coupling material and pore. The two-dimensional microcosmic model of Marshall specimen was established based on ANSYS. By entering the mechanics parameters of each phase medium, the microcosmic splitting failure test was simulated. Based on the non-contact optical test, strains of each phase medium in the AC-25 Marshall splitting test were measured and they were compared with the results of virtual and microcosmic finite element analysis. It is shown that mechanics parameters of each phase medium in the virtual and microcosmic analysis have great effect on it. Microcosmic optical strain test results are greater than the virtual microcosmic analysis’s. However, the changing rule of the two test results is similar, and the weak links of asphalt mixture’s failure in the two different analysis are both in the link between coupling material and interface.
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