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聚丙烯纤维拔出试验声发射监测
引用本文:宣卫红.聚丙烯纤维拔出试验声发射监测[J].科学技术与工程,2010,10(32).
作者姓名:宣卫红
作者单位:1. 河海大学土木与交通学院,南京,210098;金陵科技学院,南京,211169
2. 金陵科技学院,南京,211169
基金项目:江苏省建设系统科技计划项目; 江苏省高校自然科学基础研究面上项目资助
摘    要:采用室内纤维拔出试验和声发射试验,以探究聚丙烯纤维混凝土/砂浆材料的粘结破坏机理。根据聚丙烯纤维拔出试验的拔出力-拔出位移曲线,提出将聚丙烯纤维拔出破坏模型分五个阶段:完全粘结、完全粘结至部分脱粘、部分脱粘至最大脱粘、最大脱粘至完全脱粘、摩擦拔出。同步进行的声发射试验表明,累计计数-时间曲线与聚丙烯纤维拔出力-拔出位移曲线有较好的相关性,同时,声发射试验结果为提出的聚丙烯纤维拔出破坏模型提供了较好的佐证。

关 键 词:聚丙烯纤维,纤维拔出试验,声发射,粘结性能。
收稿时间:2010/8/27 0:00:00
修稿时间:2010/8/27 0:00:00

Monitoring on Polypropylene fiber pullout tests
Xuan wei-hong.Monitoring on Polypropylene fiber pullout tests[J].Science Technology and Engineering,2010,10(32).
Authors:Xuan wei-hong
Institution:XUAN Wei-hong1,2,WANG Yan2,CHEN Xiao-hong2(College of Civil and Transportation Engineering,Hohai University1,Nanjing 210098,P.R.China,Jinling Institute of Technology2,Nanjing 211169,P.R.China)
Abstract:Indoor fiber pullout test and Acoustic emission (AE) test were used to explore the bonding failure mechanism of Polypropylene (PP) fiber concrete/mortar. Based on the force-displacement curves of Polypropylene (PP) fiber pullout testing, five phases in the pullout failure process of PP fiber were proposed to the pullout model: complete bonding, complete bonding to partial debonding, partial debonding to maximum debonding, maximum debonding to complete debonding and friction pullout. Acoustic emission was carried out synchronously with pullout test. Results of AE indicated that the force-displacement curves have good relativity to accumulative counts-time curves gained in synchronous acoustic testing, furthermore, the model was proven through synchronous acoustic emissions parameters.
Keywords:Polypropylene (PP) Fiber  Fiber-pullout test  Acoustic emission (AE)  Bonding performance  
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