Pullout resistance of deformed shape memory alloy fibers embedded in cement mortar

被引：29
|
作者：
Kim, Dong Joo [1 ]
Kim, Hee Ae [1 ]
Chung, Young-Soo [2 ]
Choi, Eunsoo [3 ]
机构：
[1] Sejong Univ, Dept Civil & Environm Engn, Seoul, South Korea
[2] Chung Ang Univ, Dept Civil Engn, Seoul 156756, South Korea
[3] Hongik Univ, Dept Civil Engn, Seoul 121791, South Korea
来源：
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES | 2016年 / 27卷 / 02期
基金：
新加坡国家研究基金会;
关键词：
deformed geometry; shape memory alloy; NiTi; NiTiNb; crack closing; SELF-HEALING CAPABILITY; COMPOSITES; BEHAVIOR;
D O I：
10.1177/1045389X14566524
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, the pullout resistance of deformed shape memory alloy fibers embedded in a mortar matrix is investigated to develop self crack-closing capacity. Three types of deformed shape memory alloy fibers (dog bone-shaped, end-deformed, and crimped) and one type of smooth shape memory alloy fiber, fabricated from two different alloys, NiTi and NiTiNb, were embedded in a mortar matrix with a compressive strength of 55MPa. The pullout resistance differed considerably depending on the geometry of the fiber and composition of the alloy. The pullout resistance was generally higher for deformed shape memory alloy fibers than for the smooth shape memory alloy fiber. Among the deformed shape memory alloy fibers, dog bone-shaped fibers showed the highest enhancement in bond strength after heat treatment. The pullout resistance was higher for the NiTiNb alloy than the NiTi alloy when the shape memory alloy fiber was deformed, whereas the relationship was reversed when the shape memory alloy fiber was smooth.
引用
收藏
页码：249 / 260
页数：12
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