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·846· 工程科学学报,第38卷,第6期 process in cement mortar and concrete:a comparative study using 【型试验 acoustic emission technique.Exp Mech,2013,53:1161 一试险 [5]Xie Z,Yao H.Crack deflection and flaw tolerance in brick and ·相场法 mortar structured composites.Int J Appl Mech,2014,6(2): Ⅱ型试验 1450017 --·试验 亨相场法 ]Stergiopoulos C,Stavrakas1,Triantis D,et al.Predicting fracture of mortar beams under three-point bending using non-extensive sta- tistical modeling of electric emissions.Phys A,2015,419:603 7]Larrinaga P,Chastre C,Biscaia H,et al.Experimental and nu- merical modeling of basalt textile reinforced mortar behavior under uniaxial tensile stress.Mater Des,2014,55:66 0 1.5 2.0 2.5 8]Yang S,Hu X,Leng K,et al.Correlation between cohesive 位移mm crack-ip local fracture energy and peak load in mortar beams. 图8直接拉伸试验中I型和Ⅱ型试验中荷载一位移关系的P℉M Mater Civ Eng,2014,26:04014069 相场法模拟和试验对比 Griffith A A.The phenomena of rupture and flow in solids.Philos Fig.8 Comparison between PFM simulation and test results of Mode Trans R Soc London Ser A.1921,221:163 I and Mode II specimens in direct tension test 10] Kuhn C,Muller R.A continuum phase field model for fracture. Eng Fract Mech,2010,77:3625 4结论 [11]Cirak F,Ortiz M,Pandolfi A.A cohesive approach to thin-shell fracture and fragmentation.Comput Methods Appl Mech Eng, (1)采用非保守相场模型,对砂浆裂缝相互作用 2005,194(21):2604 导致的断裂失效进行模拟分析,并进行砂浆三点弯曲 [12]Chan Y,Paulino G,Feng B.et al.Dependence of crack tip sin- 试验和直接拉伸试验以验证模拟可靠性.经过模拟及 gularity on loading functions.Mech Res Commun,2010,37(2): 试验结果对比分析,发现相场法在砂浆断裂分析中计 191 算结果精度较高,可用来模拟裂缝相互作用导致的砂 [13]Cahn J W,Hilliard J E.Free energy of a nonuniform system.I. interfacial free energy./Chem Phys,1958,28:258 浆试件断裂失效 [14]Xu H,Li JS,Fu J X.et al.Influencing factors of Al-Si alloy (2)与经典断裂力学相比,相场法将裂缝扩展转 dendritic growth simulation by phase-field method.Unir Sci 化为能量流的流动,因而不需要详细地描述断裂面,可 Technol Beijing,2009,31(3)352 以方便地处理裂缝扩展中的拓扑变换,克服经典断裂 (徐宏,李京杜,付建勋,等。ASi合金枝品生长相场法模拟 力学计算过程繁复的缺陷,从而为砂浆断裂力学计算 影响因素.北京科技大学学报,2009,31(3):352) 提供新途径 [15]Lu Y L,Mu H,Hou H X.et al.Phase field crystal simulation (3)通过数值模拟,验证了在两种不同的初始裂 for the premelting and melting of grain boundary.Acta Metall Sin,2013,49(3):358 缝相互作用过程中,具有较大J积分的裂缝会有较快 (卢艳丽,牧虹,侯华欣.品体相场模拟品界预熔及熔化.金 的裂缝扩展速率。通过对开裂过程区尺寸的严格计 属学报,2013,49(3):358) 算,证明砂浆断裂行为呈线弹性. 16 Du L F,Zhang R,Xing H,et al.Phase-field simulation of so- lidified microstructure evolution in the presence of lateral con- 参考文献 straint.Acta Phys Sin,2013,62 (10):106401 [Liu G T,Xue H,Chen F Q,et al.Experimental studies on the (杜立飞,张蓉,刑辉,等.横向限制下凝固微观组织演化的 thermal fracture toughness of concrete and mortar in early ages. 相场法模拟.物理学报,2013,62(10):106401) Tsinghua Unin Sci Technol,1996,36(1):95 [17]Yue P,Feng J,Liu C,et al.A diffuse-interface method for sim- (刘光廷,薛慧,陈凤岐,等。混凝土、砂浆早期温度断裂韧性 ulating two-phase flows of complex fluids.J Fluid Mech,2004, 实验研究.清华大学学报(自然科学版),1996,36(1):95) 515:293 2]Xie Y J,Zheng X C,Li S M.et al.Influence of temperature on [18]Allen M,Cahn J.Ground state structures in ordered binary al- toughness of emulsified asphalt cement mortar.J Build Mater, loys with second neighbor interactions.Acta Mater,1972,20: 2013,16(6):962 423 (谢永江,郑新国,李书明.温度对水泥乳化沥青砂浆韧性的 [9]Hou Y,Wang L,Yue P,et al.Modeling mode I cracking failure 影响.建筑材料学报,2013,16(6):962) in asphalt binder by using nonconserved phase-field model.I B3]Das S,Kizilkanat A,Neithalath N.Crack propagation and strain Mater Civ Eng,2014,26(4):684 localization in metallic particulate-reinforced cementitious mortars. 20]American Society for Testing and Materials.ASTM E399 Stand- Mater Des,2015.79:15 ard Test Method for Linearelastic Planestrain Fracture Toughness 4]Sagar R,Prasad R,Prasad B,et al.Microcracking and fracture Kle of Metallic Materials.PA:ASTM International,2012工程科学学报,第 38 卷,第 6 期 图 8 直接拉伸试验中Ⅰ型和Ⅱ型试验中荷载--位移关系的 PFM 相场法模拟和试验对比 Fig. 8 Comparison between PFM simulation and test results of Mode Ⅰ and Mode Ⅱ specimens in direct tension test 4 结论 ( 1) 采用非保守相场模型,对砂浆裂缝相互作用 导致的断裂失效进行模拟分析,并进行砂浆三点弯曲 试验和直接拉伸试验以验证模拟可靠性. 经过模拟及 试验结果对比分析,发现相场法在砂浆断裂分析中计 算结果精度较高,可用来模拟裂缝相互作用导致的砂 浆试件断裂失效. ( 2) 与经典断裂力学相比,相场法将裂缝扩展转 化为能量流的流动,因而不需要详细地描述断裂面,可 以方便地处理裂缝扩展中的拓扑变换,克服经典断裂 力学计算过程繁复的缺陷,从而为砂浆断裂力学计算 提供新途径. ( 3) 通过数值模拟,验证了在两种不同的初始裂 缝相互作用过程中,具有较大 J 积分的裂缝会有较快 的裂缝扩展速率. 通过对开裂过程区尺寸的严格计 算,证明砂浆断裂行为呈线弹性. 参 考 文 献 [1] Liu G T,Xue H,Chen F Q,et al. Experimental studies on the thermal fracture toughness of concrete and mortar in early ages. J Tsinghua Univ Sci Technol,1996,36( 1) : 95 ( 刘光廷,薛慧,陈凤岐,等. 混凝土、砂浆早期温度断裂韧性 实验研究. 清华大学学报( 自然科学版) ,1996,36( 1) : 95) [2] Xie Y J,Zheng X G,Li S M. et al. Influence of temperature on toughness of emulsified asphalt cement mortar. J Build Mater, 2013,16( 6) : 962 ( 谢永江,郑新国,李书明. 温度对水泥乳化沥青砂浆韧性的 影响. 建筑材料学报,2013,16( 6) : 962) [3] Das S,Kizilkanat A,Neithalath N. Crack propagation and strain localization in metallic particulate-reinforced cementitious mortars. Mater Des,2015,79: 15 [4] Sagar R,Prasad R,Prasad B,et al. Microcracking and fracture process in cement mortar and concrete: a comparative study using acoustic emission technique. Exp Mech,2013,53: 1161 [5] Xie Z,Yao H. Crack deflection and flaw tolerance in brick and mortar structured composites. Int J Appl Mech,2014,6 ( 2 ) : 1450017 [6] Stergiopoulos C,Stavrakas I,Triantis D,et al. Predicting fracture of mortar beams under three-point bending using non-extensive sta￾tistical modeling of electric emissions. Phys A,2015,419: 603 [7] Larrinaga P,Chastre C,Biscaia H,et al. Experimental and nu￾merical modeling of basalt textile reinforced mortar behavior under uniaxial tensile stress. Mater Des,2014,55: 66 [8] Yang S,Hu X,Leng K,et al. Correlation between cohesive crack-tip local fracture energy and peak load in mortar beams. J Mater Civ Eng,2014,26: 04014069 [9] Griffith A A. The phenomena of rupture and flow in solids. Philos Trans R Soc London Ser A,1921,221: 163 [10] Kuhn C,Muller R. A continuum phase field model for fracture. Eng Fract Mech,2010,77: 3625 [11] Cirak F,Ortiz M,Pandolfi A. A cohesive approach to thin-shell fracture and fragmentation. Comput Methods Appl Mech Eng, 2005,194( 21) : 2604 [12] Chan Y,Paulino G,Feng B. et al. Dependence of crack tip sin￾gularity on loading functions. Mech Res Commun,2010,37( 2) : 191 [13] Cahn J W,Hilliard J E. Free energy of a nonuniform system. I. interfacial free energy. J Chem Phys,1958,28: 258 [14] Xu H,Li J S,Fu J X. et al. Influencing factors of Al--Si alloy dendritic growth simulation by phase-field method. J Univ Sci Technol Beijing,2009,31( 3) : 352 ( 徐宏,李京杜,付建勋,等. Al--Si 合金枝晶生长相场法模拟 影响因素. 北京科技大学学报,2009,31( 3) : 352) [15] Lu Y L,Mu H,Hou H X. et al. Phase field crystal simulation for the premelting and melting of grain boundary. Acta Metall Sin,2013,49( 3) : 358 ( 卢艳丽,牧虹,侯华欣. 晶体相场模拟晶界预熔及熔化. 金 属学报,2013,49( 3) : 358) [16] Du L F,Zhang R,Xing H,et al. Phase-field simulation of so￾lidified microstructure evolution in the presence of lateral con￾straint. Acta Phys Sin,2013,62( 10) : 106401 ( 杜立飞,张蓉,刑辉,等. 横向限制下凝固微观组织演化的 相场法模拟. 物理学报,2013,62( 10) : 106401) [17] Yue P,Feng J,Liu C,et al. A diffuse-interface method for sim￾ulating two-phase flows of complex fluids. J Fluid Mech,2004, 515: 293 [18] Allen M,Cahn J. Ground state structures in ordered binary al￾loys with second neighbor interactions. Acta Mater,1972,20: 423 [19] Hou Y,Wang L,Yue P,et al. Modeling mode I cracking failure in asphalt binder by using nonconserved phase-field model. J Mater Civ Eng,2014,26( 4) : 684 [20] American Society for Testing and Materials. ASTM E399 Stand￾ard Test Method for Linear-elastic Plane-strain Fracture Toughness KIc of Metallic Materials. PA: ASTM International,2012 · 648 ·
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