| 水泥基复合材料微结构破坏声发射研究 |
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| 引用本文： | 陈兵,吕子义,周钟鸣.水泥基复合材料微结构破坏声发射研究[J].无损检测,2004,26(4):184-187. |
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| 作者姓名： | 陈兵 吕子义 周钟鸣 |
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| 作者单位： | 1. 上海交通大学,建筑工程与力学学院,上海,200240
2. 同济大学,混凝土材料研究国家重点实验室,上海,200092 |
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| 摘 要： | 研究不同组分的水泥基复合材料在三点弯曲负荷下,材料内部微结构破坏的声发射特性。结果表明,在加载初期声发射事件发展较为缓慢,且出现的主要是一些低振幅的声发射信号;而在峰值载荷附近,声发射事件数快速增长且开始有大量高振幅声发射信号出现。循环荷载作用下,粗集料水泥砂浆声发射呈现Felicit效应,而结构密实的活性粉末混凝土呈现Kaiser效应。
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| 关 键 词： | 水泥 复合材料 声发射检验 结构破坏 |
| 文章编号： | 1000-6656(2004)04-0184-04 |
| 修稿时间： | 2003年6月9日 |
STUDY ON MICROSTRUCTURE FRACTURE OF CEMENT-BASED COMPOSITES BY ACOUSTIC EMISSION TECHNIQUE |
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| CHEN Bing,LU Zi-yi.STUDY ON MICROSTRUCTURE FRACTURE OF CEMENT-BASED COMPOSITES BY ACOUSTIC EMISSION TECHNIQUE[J].Nondestructive Testing,2004,26(4):184-187. |
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| Authors: | CHEN Bing LU Zi-yi |
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| Abstract: | The acoustic emission (AE) characteristics of the three-point-bended cement-based composite beams with different composition were studied during the fracture of microstructure. It was shown that the ratio of AE hits occurred during the initiation of loading was small and its amplitude was low. As the load reached the peak, a large number of AE hits occurred and its amplitude was high. Under cyclic loading, the behavior of coarse aggregate cement paste was generally closer to Felicit effect, while the behavior of active powder concrete was closer to Kaiser effect. |
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| Keywords: | Cement Composite Acoustic emission testing Structure fracture |
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