余雷雷,徐颖,葛进进,李洪伟,倪苏黔,张仲一,尚辉

• 1:安徽理工大学土木建筑学院
• 2:安徽理工大学国家重点实验室

摘要(Abstract)：

为探究不同倾角裂隙对岩石断裂特性的影响，本研究基于3D打印技术制备直切槽半圆盘弯曲(NSCB)试件，开展含裂隙岩体Ⅰ型静态断裂特性的试验研究。为探究不同的预制裂隙角度对于岩石断裂特性的影响，本研究基于3D打印技术制备含裂隙倾角的直切槽半圆盘弯曲试件(NSCB),打印好的试件经过固化，烘烤处理后，将其放置在干冰中，待其表面温度达到-30℃时进行准静态三点弯曲试验，该试验揭示了预制裂隙倾角对于断裂韧度、起裂角、断裂能的影响规律。结果表明：含裂隙NSCB试件平均断裂韧度均小于标准NSCB试件，且试件断裂韧度与裂隙倾角成正相关；对于含裂隙的NSCB试件，在β介于0°～90°之间时，起裂角随着裂隙倾角的增大而增大，裂纹拓展路径则表现出明显的“偏折”现象；从断裂破坏的能量角度分析，断裂能随着裂隙倾角的增大而增大。

关键词(KeyWords)： 3D打印;NSCB;断裂韧度;起裂角;断裂能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金面上项目(52074009);国家自然科学基金青年项目(52104116)~~

作者(Author): 余雷雷,徐颖,葛进进,李洪伟,倪苏黔,张仲一,尚辉

参考文献(References)：

• [1] 范天佑.断裂动力学原理与应用[M].北京：北京理工大学出版社，2006.
• [2] DING C,YANG R,CHEN C,et al.Space-time effect of blasting stress wave and blasting gas on rock fracture based on a cavity charge structure[J].Int J Rock Mech Min Sci,2022,160:105238
• [3] 龚爽，赵毅鑫，王震，等.层理对煤岩动态裂纹扩展分形特征的影响[J].煤炭学报，2021,46(8):2574-2582.[3] GONG Shuang,ZHAO Yi-xin,WANG Zhen,et al.Effect of bedding on fractal characteristics of dynamic crack propagation in coal and rock[J].Journal of China Coal Society,2021,46(8):2574-2582.(in Chinese)
• [4] 赵子江，刘大安，崔振东，等.半圆盘三点弯曲法测定页岩断裂韧度(KIC)的实验研究[J].岩土力学，2018,39(增 1):258-266.[4] ZHAO Zi-jiang,LIU Da-an,CUI Zhen-dong,et al.Experimental study of determining fracture toughness KIC of shale by semi-disk three-point bending[J].Rock and Soil Mechanics,2018,39(S1):258-266.(in Chinese)
• [5] 赵文峰，张盛，王猛，等.用两种 ISRM 推荐圆盘试样测试岩石断裂韧度的试验研究[J].实验力学，2020,35(4):702-711.[5] ZHAO Wen-feng,ZHANG Sheng,WANG Meng,et al.Experimental study on testing rock fracture toughness with two types of disc specimens recommended by ISRM[J].Journal of Experimental Mechanics,2020,35(4):702-711.(in Chinese)
• [6] WANG Q,FENG F,NI M,et al.Measurement of mode Ⅰ and mode Ⅱ rock dynamic fracture toughness with cracked straight through flattened Brazilian disc impacted by split Hopkinson pressure bar[J].Engineering Fracture Mechanics,2011,78(12):2455-2468.
• [7] GAO G,HUANG S,XIA K,et al.Application of digital image correlation(DIC) in dynamic notched semi-circular bend(NSCB) tests[J].Experimental Mechanics,2015,55(1):95-104.
• [8] 赵毅鑫，孙荘，刘斌.忻州窑烟煤 I 型和 II 型断裂特性的半圆弯曲试验对比研究[J].岩石力学与工程学报，2019,38(8):1593-1604.[8] ZHAO Yi-xin,SUN Zhuang,LIU Bin.Comparative study of semi-circular bending tests for modes I and II fracture characteristics of Xinzhouyao bituminous coal[J].Chinese Journal of Rock Mechanics and Engineering,2019,38(8):1 593-1 604.(in Chinese)
• [9] 李银平，王元汉，陈龙珠，等.含预制裂纹大理岩的压剪试验分析[J].岩土工程学报，2004,26(1):120[9] LI Yin-ping,WANG Yuan-han,CHEN Long-zhu,et al.Experimental research on pre-existing cracks in marble under compression[J].Chin J Geotech Eng,2004,26(1):120(in Chinese)
• [10] 宋选民，顾铁凤，柳崇伟.受贯通裂隙控制岩体巷道稳定性试验研究[J].岩石力学与工程学报，2002,21(12):1781[10] SONG Xuan-min,GU Tie-feng,LIU Cong-wei.Experimental study on roadway stability in rockmass with connected fissures[J].Chin J Rock Mech Eng,2002,21(12):1781(in Chinese)
• [11] 杨圣奇，渠涛，韩立军，等.注浆锚固裂隙砂岩破裂模式和裂纹扩展特征[J].工程力学，2010,27(12):156.[11] YANG Sheng-qi,QU Tao,HAN Li-jun,et al.Failure mode and crack propagation of sandstone with pre-existing fissures under different anchorages by grouting[J].Eng Mech,2010,27(12):156(in Chinese)
• [12] 王乐华，胡永搏，付寅韬，等.3D打印技术在岩石力学试验中的应用与展望[J].土木工程学报，2023,56(11):137-154.[12] WANG Le-hua,HU Yong-bo,FU Yin-tao,et al.Application and prospect of 3D printing technology in rock mechanics tests[J].Journal of Civil Engineering,2023,56(11):137-154.(in Chinese)
• [13] ZHOU T,ZHU J.Identification of a suitable 3D printing material for mimicking brittle and hard rocks and its brittleness enhancements[J].Rock Mechanics and Rock Engineering,2018,51(3):765-777.
• [14] ALIABADIAN Z,SHARAFISAFA M,TAHMASEBINIA F,et al.Experimental and numerical investigations on crack development in 3D printed rock-like specimens with pre-existing flaws[J].Engineering Fracture Mechanics,2021,241:107396.
• [15] 袁琦璐，杨镇岳，徐文生.高分子玻璃化熵理论研究进展[J].中国科学：化学，2023,53(4):616- 627.[15] YUAN Qi-lu,YANG Zhen-yue,XU Wen-sheng.Research progress in the theory of glass transition entropy of polymers[J].Chinese Science:Chemistry,2023,53(4):616- 627.(in Chinese)
• [16] ANGELL C A.Formation of glasses from liquids and biopolymers[J].Science,1995,267:1924- 1935.DOI:10.1126/science.267.5206.1924.
• [17] 田威，王肖辉，云伟，等.基于不同后处理方法的砂型3D打印类岩石试样力学性能研究[J].岩土力学，2023,44(5):1330-1340,1352.[17] TIAN Wei,WANG Xiao-hui,YUN Wei,et al Research on the mechanical properties of sand 3D printed rock specimens based on different post-processing methods[J].Geotechnical Mechanics,2023,44(5):1330-1340,1352(in Chinese)
• [18] 齐振武，王培涛，张博，等.基于3D打印的类节理岩体模型及力学特性试验研究[J/OL].煤炭学报，1- 8.[2024- 05- 06].https://doi.org/10.13225/j.cnki.jccs.2022.1544.[18] QI Zhen-wu,WANG Pei-tao,ZHANG Bo,et al.Experimental study on 3D printed jointed rock mass model and mechanical properties[J/OL].Journal of Coal Science:1- 8.[2024- 01- 04].https://doi.org/10.13225/j.cnki.jccs.2022.1544.(in Chinese)
• [19] KURUPPU M D,CHONG K P.Fracture toughness testing of brittle materials using semi-circular bend(SCB) specimen[J].Engineering Fracture Mechanics,2012,91:133-150.
• [20] 丁遂栋，孙利民.断裂力学[M].北京：机械工业出版社，1997:106-107.
• [21] KURUPPU M D,OBARA Y,AYATOLLAHI M R,et al.ISRM-suggested method for determining the mode I static fracture toughness using semi-circular bend specimen[J].Rock Mechanics and Rock Engineering,2014,47(1):267-274.
• [22] 高玮，崔爽，肖婷，等.基于最小塑性区半径准则的岩石裂纹起裂规律[J].煤炭学报，2021,46(10):3193-3202.[22] GAO Wei,CUI Shuang,XIAO Ting,et al.Crack initiation of rock based on the minimum plastic zone radius criterion[J].Journal of China Coal Society,2021,46(10):3193-3202.(in Chinese)
• [23] ALIHA M R M,AYATOLLAHI M R,SMITH D J,et al.Geometry and size effects on fracture trajectory in a limestone rock under mixed mode loading[J].Engineering Fracture Mechanics,2010,77(11):2200-2212.
• [24] 龚江宏.陶瓷断裂力学[M].北京：清华大学出版社，2001.