DOI: 10.3724/SP.J.1249.2017.05476

Journal of Shenzhen University Science and Engineering (深圳大学学报理工版) 2017/34:5 PP.476-481

Influence of interface thickness on twin fiber pull-out test of concrete

Meso-level heterogeneous distribution of interface mechanical parameters is investigated. Numerical models for twin fibers pull-out test are created by using 3D finite element method. Influence of interface thickness on damage pattern and mechanical properties is studied on twin fibers pull-out test specimens. By applying load with displacement control, load-displacement curves, acoustic emission (AE) accumulative curves and interface shear stress distribution curves of twin fibers and concrete matrix specimen are plotted. The damage pattern and AE pattern of pull-out test specimen vary along with the interface strength. The thicker the interface is, the higher the interface capacity for transferring stress and high shear strength. The splitting of fibers could happen later than the specimen with thin interface. In addition, appropriate thick interface benefits the improved peak load and toughness.

Key words:concrete,meso-mechanical,double fiber pull-out test,interface strength,acoustic emission,peak load,toughness

ReleaseDate:2017-10-20 02:07:30

[1] 朱文亮.界面相特性对碳纳米管增强复合材料力学性能的影响分析[D].广州:华南理工大学,2011. Zhu Wenliang.Analysis of the interfacial properties on the mechanical behavior of carbon nano-tube reinforced composites with and without debonding interface[D].Guangzhou:South China University of Technology,2011.(in Chinese)

[2] 潘媚娟,王富耻,马壮,等.界面改性对新型SiC 3D/环氧树脂复合材料力学性能的影响[J].稀有金属材料与工程,2015,44(s1):528-532. Pan Meijuan, Wang Fuchi, Ma Zhuang, et al. Mechanical properties of ceramic-epoxy composites with 3D connectivity of phases by addition of coupling agent[J].Rare Metal Materials and Engineering,2015,44(s1):528-532.(in Chinese)

[3] Wang X H,Jacobsen S,He J Y,et al.Application of nanoindentation testing to study of the interfacial transition zone in steel fiber reinforced mortar[J].Cement & Concrete Research,2009,39(8):701-715.

[4] 代超,刘伟超.钢纤维-水泥石基体界面粘结性能研究进展综述[J].公路交通技术,2014(5):16-22. Dai Chao,Liu Weichao.Overview for development of research on adhesive property of steel fiber-cement matrix interface[J].Technology of Highway and Transport,2014(5):16-22.(in Chinese)

[5] 谢建斌,何天淳,程赫明.钢纤维混凝土界面粘接的研究[J].河南科学,2002,20(6):634-637. Xie Jianbin,He Tianchun,Cheng Heming.The research on the interface agglutination of the steel fibre reinforced concrete[J].Henan Science,2002,20(6):634-637.(in Chinese)

[6] 胡杰,徐礼华,邓方茜,等.聚丙烯纤维增强水泥基复合材料界面过渡区的纳米力学性能[J].硅酸盐学报,2016,44(2):268-278. Hu Jie,Xu Lihua,Deng Fangqian,et al.Nanoscale mechanical properties of interfacial transition zone between polypropylene fiber and cement matrix[J]. Journal of The Chinese Ceramic Society,2016,44(2):268-278.(in Chinese)

[7] 伍章健.复合材料界面和界面力学[J].应用基础与工程科学学报,1995(3):80-92. Wu Zhangjian.Composite interphase and interfacial mechanics[J].Journal of Basic Science and Engineering,1995(3):80-92.(in Chinese)

[8] 赵慧建,郭庆勇,陈磊,等.胶层厚度对CFRP-混凝土界面性能影响的数值分析[J].应用科技,2017,44:1-6. Zhao Huijian,Guo Qingyong,Chen Lei,et al.Numerical analysis on influence of adhesive thickness to the interfacial properties of CFRP-concrete[J].Applied Science and Technology,2017,44:1-6.(in Chinese)

[9] 唐春安,朱万成.混凝土损伤与断裂-数值试验[M].北京:科学出版社,2003. Tang Chun'an,Zhu Wancheng.Concrete damage and fracture:numerical tests[M].Beijing:Science Press,2003.(in Chinese)

[10] 裴永琪.纤维与基体的界面力学特性分析[D].重庆:西南交通大学,2012. Pei Yongqi.Analysis of interface mechanical properties between fiber and matrix[D].Chongqing:Southwest Jiaotong University,2012.(in Chinese)

[11] 朱大胜,顾伯勤,陈晔.纤维增强弹性体基复合材料单纤维拔出试验细观力学分析[J].工程力学,2009,26(5):1-7. Zhu Dasheng,Gu Boqin,Chen Ye.Micromechanical Analysis of single-fiber pull-out test of fiber-reinforced elastomer matrix composites[J].Engineering Mechanics,2009,26(5):1-7.(in Chinese)

[12] Mazumdar S K,Mallick P K.Static and fatigue behavior of adhesive joints in SMC-SMC composites[J].Polymer Composites,1998,19(2):139-146.

[13] 朱波,蔡珣,王成国,等.声发射特性与材料断裂韧性相关性研究[J].物理学报,2003,52(8):1960-1964. Zhu Bo,Cai Xun,Wang Chengguo,et al.Studies on the relationship between acoustic emission characteristics and fracture toughness of materials[J].ACTA Physica Sinica,2003,52(8):1960-1964.(in Chinese)

[14] 梅明星.基于声发射技术的损伤检测应用研究[D].南京:东南大学,2016. Mei Mingxing.Application research on damage detection based on acoustic emission technique PH[D].Nanjing:Southeast University,2016.(in Chinese)