| 低温下沥青中柔性短纤维桥联应力计算模型 |
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| 引用本文： | 丁智勇,彭波,王振军.低温下沥青中柔性短纤维桥联应力计算模型[J].交通运输工程学报,2011(5):6-11,34. |
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| 作者姓名： | 丁智勇 彭波 王振军 |
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| 作者单位： | 长安大学道路施工技术与装备教育部重点实验室;长安大学特殊地区公路工程教育部重点实验室;长安大学材料科学与工程学院; |
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| 基金项目： | 国家自然科学基金项目(50908021); 中央高校基本科研业务费专项资金项目(CHD2011JC042) |
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| 摘 要： | 分析了柔性纤维增强脆性材料特点,建立了单根纤维从沥青中拔出时的受力模型。采用球面坐标系建立空间均匀分布短纤维桥联应力的计算模型,计算了沥青断裂时短纤维产生的桥联应力。采用大尺寸的纤维沥青试件进行低温拉伸断裂试验,实测短纤维的桥联应力。通过对桥联应力的计算值和实测值进行试算拟合,修正了计算模型中的参数。分析结果表明：桥联...
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| 关 键 词： | 路面材料 柔性短纤维 低温 沥青 桥联应力 计算模型 拉伸断裂试验 |
Computation model of bridging stress for flexible short fiber in asphalt at low temperature |
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| DING Zhi-yong,PENG Bo,WANG Zhen-jun.Computation model of bridging stress for flexible short fiber in asphalt at low temperature[J].Journal of Traffic and Transportation Engineering,2011(5):6-11,34. |
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| Authors: | DING Zhi-yong PENG Bo WANG Zhen-jun |
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| Institution: | DING Zhi-yong1,PENG Bo2,WANG Zhen-jun3(1.Key Laboratory for Highway Construction Technology and Equipment of Ministry of Education,Chang'an University,Xi'an 710064,Shaanxi,China,2.Key Laboratory for Special Area Highway Engineering of Ministry of Education,3.School of Materials Science and Engineering,China) |
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| Abstract: | The characteristics of flexible-fiber-reinforced brittle materials were analyzed,and a mechanical model of single fiber pulled out from asphalt at low temperature was established.In spherical coordinate,a computation model of bridging stress for short fiber was established when short fibers uniformly distributed in asphalt,and the bridging stress was computed when asphalt ruptured.The bridging stress was measured by using tensile test and large size fiber asphalt samples at low temperature.The calculation m... |
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| Keywords: | pavement material flexible short fiber low temperature asphalt bridging stress calculation model tensile test |
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