| 碳纤维增强水泥基复合材料的压阻效应 |
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| 引用本文： | 赵晓华,李国宝,王玉林,李庚英.碳纤维增强水泥基复合材料的压阻效应[J].复合材料学报,2011(5):214-219. |
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| 作者姓名： | 赵晓华 李国宝 王玉林 李庚英 |
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| 作者单位： | 汕头大学土木工程系; |
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| 基金项目： | 教育部高等学校博士学科点专项科研基金(20060560003); 广东省高等学校自然科学研究重点项目(06Z013) |
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| 摘 要： | 试验研究了短切碳纤维增强水泥基复合材料（CFRC）的压阻效应,获得了正、负两种压阻效应相互转换的全过程。从隧道效应和孔隙的连通性角度对该现象的产生机理进行了探讨。结果表明,在连续烘干和单向循环加载条件下,CFRC的压阻效应会随含水量变化而发生改变。多数情况下,CFRC的体积电阻率随压应变单调减少,压阻效应为正。含水量越...
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| 关 键 词： | 碳纤维/水泥复合材料 压阻效应 含水量 隧道效应 孔隙连通性 |
Piezoresistivity of carbon fiber reinforced cement-matrix composites |
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| ZHAO Xiaohua,LI Guobao,WANG Yulin,LI Gengying.Piezoresistivity of carbon fiber reinforced cement-matrix composites[J].Acta Materiae Compositae Sinica,2011(5):214-219. |
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| Authors: | ZHAO Xiaohua LI Guobao WANG Yulin LI Gengying |
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| Affiliation: | ZHAO Xiaohua,LI Guobao,WANG Yulin,LI Gengying(Department of Civil Engineering,Shantou University,Shantou 515063,China) |
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| Abstract: | The piezoresistivity of short carbon fiber reinforced cement-matrix composites(CFRC) was experimentally studied.The whole process of transition from positive to negative piezoresistivity was observed.The results show that under continuously drying and uniaxially cyclic loading,both positive and negative piezoresistivity occur in CFRC due to the variation of moisture content in the composites.For most cases the electrical resistivity of the composites decreases monotonically upon longitudinal compression,and... |
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| Keywords: | carbon fiber/cement composites piezoresistivity moisture content tunneling effect pore network connectivity |
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