| 沥青混凝土小梁断裂路径数值模拟研究 |
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| 引用本文： | 曹鹏,冯德成,曹一翔.沥青混凝土小梁断裂路径数值模拟研究[J].公路,2012(6):92-95. |
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| 作者姓名： | 曹鹏 冯德成 曹一翔 |
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| 作者单位： | 哈尔滨工业大学交通学院 哈尔滨市 150090 |
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| 基金项目： | 西部交通建设科技项目，高等学校博士学科点专项科研基金项目 |
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| 摘 要： | 半刚性基层沥青混凝土路面是我国最为常见的路面结构形式,但沥青混凝土路面容易在使用过程中发生断裂,而沥青材料的疲劳断裂行为是半刚性基层沥青混凝土路面开裂的主要原因。通过使用扩展有限元方法对沥青混凝土三点预置缺口梁的疲劳裂纹扩展进行了数值模拟,并将数值模拟结果与试验进行了对比,发现两者在断裂形态上非常相似,并且裂纹在最初几次载荷加载时扩展尺寸较大。
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| 关 键 词： | 沥青混凝土路面 数值模拟 断裂 扩展有限元 疲劳 |
A Study on Numerical Simulation of Crack Propagation Path in Asphalt Concrete Beam |
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| CAO Peng
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FENG De-cheng
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CAO Yi-xiang.A Study on Numerical Simulation of Crack Propagation Path in Asphalt Concrete Beam[J].Highway,2012(6):92-95. |
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| Authors: | CAO Peng FENG De-cheng CAO Yi-xiang |
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| Institution: | (School of Science and Engineering on Transport,Harbin Institute of Technology,Harbin 150090,China) |
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| Abstract: | The semi-rigid asphalt concrete pavements are the most widely used in China.The fracture behaviour of the asphalt concrete pavement,induced by the fatigue vehicle loading,is the mainly distress of pavement.In this paper,based on extended finite element coupled,fatigue damage numerical simulation of three point-bending beam with initial notch has been made.The result of numerical calculation and the test could match very well in the crack propagation path.Furthermore numerical results show that length of crack expanding is the biggest during the first loading. |
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| Keywords: | asplalt concrete pavement numerical simulation fracture extended finite element fatigue |
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