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工程力学  2015 

环氧沥青混凝土裂纹起裂与失稳扩展的临界特征

DOI: 10.6052/j.issn.1000-4750.2013.07.0666, PP. 96-103

Keywords: 环氧沥青混凝土,三维离散元方法,虚拟断裂试验,裂尖张开位移,裂缝口张开位移

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Abstract:

为了获取环氧沥青混凝土的裂纹起裂与失稳扩展临界点,重构了环氧沥青混凝土非均质(集料、砂浆和空隙)多层次(矿料级配)结构三维虚拟试件,采用离散元方法实施了单边切口小梁虚拟三点弯曲试验,借助数字摄像法捕捉了室内小梁试件表面裂纹发展情况,分析了裂缝发展过程中裂缝尖端张开位移(CTOD)和裂缝口张开位移(CMOD)之间的变化关系。研究结果表明:裂尖张开位移δ25参数的使用为理解实际流入断裂带用于裂缝扩展的那部分能量开辟了一条新思路;裂缝尖端张开位移和裂缝口张开位移关系曲线的两个转折点描述了裂缝起裂和临界失稳扩展状态,环氧沥青混凝土断裂过程中裂缝的扩展经历了起裂、稳定扩展和失稳扩展3个阶段;δ25-CMOD曲线分析法可以作为研究沥青混凝土材料断裂行为的辅助手段。

References

[1]  钱振东, 罗剑, 敬淼淼. 沥青混凝土钢桥面铺装方案受力分析[J]. 中国公路学报, 2005, 2(18): 61―64.
[2]  Qian Zhendong, Luo Jian, Jing Miaomiao. Mechanical analysis of asphalt concrete paving projects on steel bridge deck [J]. China Journal of Highway and Transport, 2005, 2(18): 61―64. (in Chinese)
[3]  侯艳丽, 张楚汉. 用三维离散元实现混凝土I型断裂模拟[J]. 工程力学, 2007, 24(1): 37―43.
[4]  Hou Yanli, Zhang Chuhan. Mode I-fracture simulation of concrete based on 3D discrete element method [J]. Engineering Mechanics, 2007, 24(1): 37―43. (in Chinese)
[5]  侯艳丽, 周元德, 张楚汉. 用3D离散元实现I/II型拉剪混合断裂的模拟[J]. 工程力学, 2007, 24(3): 1―7.
[6]  Hou Yanli, Zhou Yuande, Zhang Chuhan. I/II tensile-shear mixed mode fracture simulation by 3D discrete element method [J]. Engineering Mechanics, 2007, 24(3): 1―7. (in Chinese)
[7]  Liu Y, Dai Q L, You Z P. Viscoelastic model for discrete element simulation of asphalt mixtures [J]. Journal of Engineering Mechanics, 2009, 135(4): 324―333.
[8]  You Z P, Liu Y, Dai Q L. Three-dimensional microstructural-based discrete element viscoelastic modeling of creep compliance tests for asphalt mixtures [J]. Journal of Materials in Civil Engineering, 2010, 23(1): 79―87.
[9]  李蕊, 常明丰, 李彦伟, 等. 沥青混合料裂缝扩展过程细观力学模拟[J]. 交通运输工程学报, 2011, 6(11): 1―9.
[10]  Li Rui, Chang Mingfeng, Li Yanwei, et al. Micromechanics simulation of micro-crack extension process for asphalt mixture [J]. Journal of Traffic and Transportation Engineering, 2011, 6(11): 1―9. (in Chinese)
[11]  Kim H, Wagoner M P, Buttlar W G. Micromechanical fracture modeling of asphalt concrete using a single-edge notched beam test [J]. Materials and Structures, 2009, 42(5): 677―689.
[12]  Wang J Y, Qian Z D, Wang L B. Three-dimensional fracture modeling of epoxy asphalt concrete using a heterogeneous discrete element model [C]// Proceedings of the Annual Meeting 92nd of Transportation Research Board (TRB). Washington D.C, 2012.
[13]  钱振东, 李智, 陈春红. 钢桥面环氧沥青混凝土铺装层Ⅰ型裂缝的断裂判据[J]. 中国公路学报, 2008, 21(5): 34―38.
[14]  Qian Zhendong, Li Zhi, Chen Chunhong. Fracture criterion for mode I crack of epoxy asphalt concrete paving course of steel deck bridge [J]. China Journal of Highway and Transport, 2008, 21(5): 34―38. (in Chinese)
[15]  徐世烺, 吴智敏, 丁生根. 砼双K断裂参数的实用解析方法[J]. 工程力学, 2003, 20(3): 57―61. Xu Shilang, Wu Zhimin, Ding Shenggen. A practical analytical approach to the determination of double-K fracture parameters of concrete [J]. Engineering Mechanics, 2003, 20(3): 57―61. (in Chinese)
[16]  徐世烺, 张秀芳, 卜丹. 混凝土裂缝扩展过程中裂尖张开口位移( CTOD )与裂缝嘴张开口位移( CMOD )的变化关系分析[J]. 工程力学, 2011, 28(5): 64―70.
[17]  Xu Shilang, Zhang Xiufang, Bu Dan. Relationship between crack tip opening displacement (CTOD) and crack mouth opening displacement (CMOD) throughout development of concrete crack [J]. Engineering Mechanics, 2011, 28(5): 64―70. (in Chinese)
[18]  Liu Y, You Z P. Visualization and simulation of asphalt concrete with randomly generated three-dimensional models [J]. Journal of Computing in Civil Engineering, 2009, 23(6): 340―347.
[19]  Wang L B. Mechanics of asphalt: microstructure and micromechanics [M]. New York: McGraw Hill, 2011: 292―293.
[20]  Song S H, Wagoner M P, Paulino G H, et al. δ 25 Crack opening displacement parameter in cohesive zone models: experiments and simulations in asphalt concrete [J]. Fatigue & Fracture of Engineering Materials & Structures, 2008, 31(10): 850―856.
[21]  ASTM STP 1256, Introduction of δ 5 as an operational definition of the CTOD and its practical use [S]. Philadelphia: American Society for Testing and Materials, 1995: 763―778.
[22]  Xu S L, Reinhardt H W. Determination of double-K criterion for crack propagation in quasibrittle fracture, Part I: Experiment investigation of crack propagation [J]. International Journal of Fracture, 1999, 98(2): 111―149.

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