Investigations on Cyclic Flexural Behavior of Fiber Reinforced Cementitious Composites Using Digital Image Correlation and Acoustic Emissions

被引:0
作者
Sherif, Muhammad M. [1 ]
Ozbulut, Osman E. [1 ]
Tanks, Jonathon [2 ]
机构
[1] Univ Virginia, Dept Civil & Environm Engn, Charlottesville, VA 22901 USA
[2] Tokyo Inst Technol, Dept Civil & Environm Engn, Tokyo 1528550, Japan
来源
INTERNATIONAL DIGITAL IMAGING CORRELATION SOCIETY | 2017年
关键词
Shape memory alloys; Fiber reinforced cementitious composites; Digital image correlation; Acoustic emissions; SHAPE-MEMORY ALLOYS;
D O I
10.1007/978-3-319-51439-0_41
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Superelastic shape memory alloys (SE SMAs) are smart materials that recover 6-8% of inelastic strains upon unloading and exhibit good energy dissipation. In this study, the mechanical behavior of cementitious composites, reinforced with steel and SE SMA fibers, under flexure was examined. Fiber reinforced concrete, with a total fiber volume ratio of 0.6%, was prepared and a third point bending flexural test was conducted using an incrementally increasing displacement loading protocol. DIC was used to measure the strain and displacement contours and detect the crack width propagation. The results of the cyclic flexural testing were analyzed to assess the re-centering and crack recovery capabilities. Acoustic emissions (AE) were monitored using AE transducers to predict the failure modes (fiber pullout/matrix cracking). The AE were analyzed using average frequency, cumulative energy, duration and hits. The correlation between the DIC and AE was investigated. The results suggest that the crack data can be correlated with AE.
引用
收藏
页码:173 / 175
页数:3
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