doi:

DOI: 10.3724/SP.J.1249.2018.05460

Journal of Shenzhen University Science and Engineering (深圳大学学报理工版) 2018/35:5 PP.460-466

Visual analysis for cracking evolution of micro-beam under three-point bending


Abstract:
The traditional three-point bending test is unable to realize visual quantitative analysis of sample internal crack. In order to observe the crack evolution process, we, in-situ, track and monitor the micro-beam cracking process under the three-point bending by X-ray microcomputed tomography technology (X-ray μCT). We analyze quantitatively the pore and crack of micro-beam by 2D/3D visualization of the morpholog characteristics. The results show that X-ray μCT technology test is an effective nondestructive and in-situ tracking method; The three-dimensional visualization of pore and crack and the crack propagation under three-point bending test can be obtained; moreover, crack and pore quantitative analysis can be performed to get the length variation curve of crack under X-ray μCT test and the crack volume histogram.

Key words:structural engineering,three-point bending,crack propagation process,crack length,3D visualization,X-ray microcomputed tomography

ReleaseDate:2018-12-14 06:52:39



[1] 任晓丹,李杰. 基于损伤理论的钢筋混凝土结构裂缝分析[J]. 同济大学学报,2015, 43(8):1129-1134. REN Xiaodan, LI Jie. Crack analysis of reinforced concrete structures based on damage theory[J]. Journal of Tongji University, 2015, 43(8):1129-1134.(in Chinese)

[2] 牛建刚,牛荻涛. 荷载作用下混凝土的耐久性研究[J]. 混凝土,2008(8):30-33. NIU Jiangang, NIU Ditao. A study on durability of concrete under loading[J]. Concrete, 2008(8):30-33.(in Chinese)

[3] 陆文攀,赵铁军,马志鸣,等. 荷载损伤对混凝土微裂缝和氯离子侵蚀的影响研究[J]. 混凝土,2015(6):54-57. LU Wenpan, ZHAO Tiejun, MA Zhiming, et al. Research on the impact of load damage on concrete micro-cracks and chloride ion erosion[J]. Concrete, 2015(6):54-57.(in Chinese)

[4] 郭平功,赵铁军,田砾. 裂缝、表面防水处理对混凝土耐久性的影响[J]. 混凝土,2007(8):17-20. GUO Pinggong, ZHAO Tiejun, TIAN Li. Effects of cracks and surface waterproofing on concrete durability[J]. Concrete, 2007(8):17-20.(in Chinese)

[5] 万小梅,苏卿,赵铁军,等. 单轴受压混凝土的微裂缝和氯离子侵入性[J]. 土木建筑与环境工程,2013,35(1):104-110. WANG Xiaomei, SU Qing, ZHAO Tiejun, et al. The microcracks of single-axial compression concrete and chloride ion intrusion[J]. Civil Architecture and Environmental Engineering, 2013, 35(1):104-110.(in Chinese)

[6] 金伟良,牛荻涛. 工程结构耐久性与全寿命设计理论[J]. 工程力学,2011,28(s2):31-37. JIN Weiliang, NIU Ditao. Design theory of structural durability and total life design[J]. Engineering Mechanics, 2011, 28(s2):31-37.(in Chinese)

[7] 金伟良,赵羽习. 混凝土结构耐久性研究的回顾与展望[J]. 浙江大学学报工学版,2002,36(4):371-380. JIN Weiliang, ZHAO Yuxi. Review and prospect on durability of concrete structures[J]. Journal of Zhejiang University Engineering Science, 2002, 36(4):371-380.(in Chinese)

[8] 杨水成,黄松梅,宋俐,等. 岩石与混凝土三维界面裂缝断裂准则的试验研究[J]. 水利学报,2002,33(10):107-112. YANG Shuicheng, HUANG Songmei, SONG Li, et al. Experimental study on crack fracture criteria of three-dimensional interfacial fracture of rock and concrete[J]. Journal of Water Conservancy, 2002, 33(10):107-112.(in Chinese)

[9] 于骁中,张彦秋,曹建国,等. 混凝土复合型(I、Ⅱ型)裂纹断裂准则的计算和试验研究[J]. 水利学报,1982(6):29-39. YU Xiaozhong, ZHANG Yanqiu, CAO Jianguo, et al. Calculation and experimental study of crack fracture criteria of concrete composite type (I, Ⅱ)[J]. Journal of Water Conservancy, 1982(6):29-39.(in Chinese)

[10] 徐世烺,赵国藩. 混凝土结构裂缝扩展的双K断裂准则[J]. 土木工程学报,1992,25(2):32-38. XU Shilang, ZHAO Guofan. Concrete structure crack extension of double K fracture criterion[J]. Journal of Civil Engineering, 1992, 25(2):32-38.(in Chinese)

[11] DONG W, WU Z, ZHOU X, et al. A comparative study on two stress intensity factor-based criteria for prediction of mode-I crack propagation in concrete[J]. Engineering Fracture Mechanics, 2016, 158:39-58.

[12] 徐世烺,赵国藩. 混凝土裂缝的稳定扩展过程与临界裂缝尖端张开位移[J]. 水利学报,1989(4):33-44. XU Shilang, ZHAO Guofan. The stability of the concrete crack propagation process and critical crack tip opening displacement[J]. Journal of Water Conservancy, 1989(4):33-44.(in Chinese)

[13] 管东芝,邢晨曦,韩苏闽. 电测法应用于混凝土结构的表面应变测试[J]. 实验室研究与探索,2011,30(1):30-32. GUAN Dongzhi, XING Chenxi, HAN Sumin. The surface strain test applied to concrete structures by the electric measurement method[J]. Laboratory Research and Exploration, 2011, 30(1):30-32.(in Chinese)

[14] 徐世烺,赵国藩. 光弹性贴片法研究混凝土裂缝扩展过程[J]. 水力发电学报,1991(3):8-18. XU Shilang, ZHAO Guofan. Photoelastic coating method research concrete crack extension process[J]. Journal of Hydroelectric Power, 1991(3):8-18.(in Chinese)

[15] 董伟,何化南,吴智敏,等. 光弹贴片法研究混凝土Ⅰ-Ⅱ复合型裂缝扩展过程[J]. 工程力学,2010,27(9):41-48. DONG Wei, HE Huanan, WU Zimin, et al. Photoelastic Ⅰ-Ⅱ composite patch method research concrete crack propagation process[J]. Journal of Engineering Mechanics, 2010, 27(9):41-48.(in Chinese)

[16] 刘龙. 混凝土结构无损检测中的激光散斑干涉计量术[D]. 南京:东南大学,2003. LIU Long. Laser speckle interferometry in nondestructive testing of concrete structures[D]. Nanjing:Southeast University, 2003.(in Chinese)

[17] ZHOU H, LIU Y, LU Y, et al. In-situ crack propagation monitoring in mortar embedded with cement-based piezoelectric ceramic sensors[J]. Construction & Building Materials, 2016, 126:361-368.

[18] OHNO K, UJI K, UENO A, et al. Fracture process zone in notched concrete beam under three-point bending by acoustic emission[J]. Construction & Building Materials, 2014, 67(6):139-145.

[19] DONG B, FANG G, LIU Y, et al. Monitoring reinforcement corrosion and corrosion-induced cracking by X-ray microcomputed tomography method[J]. Cement & Concrete Research, 2017, 100:311-321.

[20] 刘昱清,董鹏,滕晓娟,等. 基于X-ray μCT技术的钢筋锈胀特征分析[J]. 深圳大学学报理工版, 2017,34(6):618-624. LIU Yuqing, DONG Peng, TENG Xiaojuan, et al. Analysis on the corrosion and swelling of steel bars based on X-ray μCT[J]. Journal of Shenzhen University, 2017, 34(6):618-624.(in Chinese)

[21] 刘昱清,丁蔚健,秦韶丰,等. 基于XCT技术的混凝土智能缓蚀系统性能表征[J]. 建筑材料学报,2018,21(1):33-40. LIU Yuqing, DING Weijian, QIN Shaofeng, et al. Inhibition performance evaluation of smart concrete system by X-ray μCT[J]. Journal of Building Materials, 2017, 21(1):33-40.(in Chinese)