A new testing method for mode Ⅰ crack initiation fracture toughness under middle-low speed impacts

SHI Zebin; ZHU Zheming; WANG Xiaomeng; WANG Xiong

doi:10.11883/bzycj-2017-0132

Volume 38 Issue 6

Sep. 2018

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Article Navigation > Explosion And Shock Waves > 2018 > 38(6): 1247-1254

SHI Zebin, ZHU Zheming, WANG Xiaomeng, WANG Xiong. A new testing method for mode Ⅰ crack initiation fracture toughness under middle-low speed impacts[J]. Explosion And Shock Waves, 2018, 38(6): 1247-1254. doi: 10.11883/bzycj-2017-0132

Citation:

SHI Zebin, ZHU Zheming, WANG Xiaomeng, WANG Xiong. A new testing method for mode Ⅰ crack initiation fracture toughness under middle-low speed impacts[J]. Explosion And Shock Waves, 2018, 38(6): 1247-1254. doi: 10.11883/bzycj-2017-0132

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A new testing method for mode Ⅰ crack initiation fracture toughness under middle-low speed impacts

doi: 10.11883/bzycj-2017-0132

Key Laboratory of Energy Engineering Safety and Disaster Mechanics, School of Architecture and Environment, Sichuan University, Chengdu 610065, Sichuan, China

Received Date: 2017-04-26
Rev Recd Date: 2017-09-16
Publish Date: 2018-11-25

Abstract

Abstract

In this work, we proposed a specimen with a new configuration specimen, i.e.double inclined bottom central cracked specimen (DIBCC) to explore a more suitable configuration specimen for the study of the behavior of Mode Ⅰ crack under impacts, by conducting tests using a middle-low speed drop hammer impact test device, and by driving the initiation and propagation of the prefabricated crack inside the DIBCC specimens using stress waves.Meanwhile, we measured the crack initiation time using a strain gauge test system and carried out the corresponding numerical simulation using the AUTODYN finite difference code.Then we calculated the dynamic stress intensity factors and determined the initiation toughness of the specimens using the initiation time measured from the experiments.The results show that, under the action of the reflected tensile waves, the prefabricated crack surfaces have outward displacements perpendicular to the crack surface, making the prefabricated crack expand and thus induce the crack to initiate, and that the numerical result of the crack propagation path agrees well with the test result, indicating that the DIBCC configuration specimen proposed is effective and can be used to test the fracture toughness under impacts.
- mode Ⅰ crack,
- double inclined bottom central cracked specimen(DIBCC),
- stress wave,
- impact load,
- AUTONYN,
- initiation fracture toughness

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References(27)

References

[1]	LOEBER J F, SIH G C.Diffraction of antiplane shear waves by a finite crack[J].Acoustical Society of America, 1968, 44(1):90-98. doi: 10.1121/1.1911091
[2]	HARRIS J G.Diffraction by a crack of a cylindrical longitudinal pulse[J].Journal of Applied Mathematics and Physics, 1980, 31(3):367-383. doi: 10.1007%2FBF00236484
[3]	BERTRAM A, KALTHOFF J F.Crack propagation toughness of rock for the range of low to very high crack speeds[J].Key Engineering Materials, 2003, 251/252:423-430. doi: 10.4028/www.scientific.net/KEM.251-252
[4]	LEE D, TIPPUR H, BOGERT P.Dynamic fracture of graphite/epoxy composites stiffened by buffer strips:an experimental study[J].Composite Structures, 2012, 94(12):3538-3545. doi: 10.1016/j.compstruct.2012.05.032
[5]	胡柳青, 李夕兵, 龚声武.冲击载荷作用下裂纹动态响应的数值模拟[J].爆炸与冲击, 2006, 26(3):214-221. doi: 10.3321/j.issn:1001-1455.2006.03.004 HU Liuqing, LI Xibing, GONG Shengwu.Simulation on dynamic response of crack subjected to impact loading[J].Explosion and Shock Waves, 2006, 26(3):214-221. doi: 10.3321/j.issn:1001-1455.2006.03.004
[6]	杨井瑞, 张财贵, 周妍, 等.用CSTBD试样确定砂岩的动态起裂和扩展韧度[J].爆炸与冲击, 2014, 34(3):264-271. http://www.bzycj.cn/CN/abstract/abstract8838.shtml YANG Jingrui, ZHANG Caigui, ZHOU Yan, et al.Determination of dynamic initiation toughness and propagation toughness of sandstone using CSTBD specimens[J].Explosion and Shock Waves, 2014, 34(3):264-271. http://www.bzycj.cn/CN/abstract/abstract8838.shtml
[7]	ZHANG Q B, ZHAO J.Effect of loading rate on fracture toughness and failure micromechanisms in marble[J].Engineering Fracture Mechanics, 2013, 102(6):288-309. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=JJ0229785505
[8]	ZHANG Z X, KOU S Q, YU J, et al.Effects of loading rate on rock fracture[J].International Journal of Rock Mechanics and Mining Sciences, 1999, 36(5):597-611. doi: 10.1016/S0148-9062(99)00031-5
[9]	王蒙, 朱哲明, 胡荣.基于SCSCC试样的岩石复合型裂纹动态扩展特征研究[J].四川大学学报(工程科学版), 2016(2):57-65. http://d.old.wanfangdata.com.cn/Periodical/scdxxb-gckx201602009 WANG Meng, ZHU Zheming, HU Rong.Rock experiments study of crack propagation under Ⅰmode and Ⅰ-Ⅱ mixed-mode dynamic loading using SCSCC specimens[J].Journal of Sichuan University (Engineering Science Edition), 2016(2):57-65. http://d.old.wanfangdata.com.cn/Periodical/scdxxb-gckx201602009
[10]	王蒙, 朱哲明, 王雄.冲击荷载作用下的Ⅰ/Ⅱ复合型裂纹扩展规律研究[J].岩石力学与工程学报, 2016, 35(7):1323-1332. http://cdmd.cnki.com.cn/Article/CDMD-10674-1015635867.htm WANG Meng, ZHU Zheming, WANG Xiong.Study on the growth rule of mixed-modeⅠ/Ⅱ crack under impacting loads[J].Chinese Journal of Rock Mechanics and Engineering, 2016, 35(7):1323-1332. http://cdmd.cnki.com.cn/Article/CDMD-10674-1015635867.htm
[11]	徐文涛, 朱哲明, 曾利刚.爆炸载荷下Ⅰ型裂纹动态断裂韧度测试方法初探[J].岩石力学与工程学报, 2015(增刊1):2767-2772. XU Wentao, ZHU Zheming, ZENG Ligang.Testing method study of mode-Ⅰ dynamic fracture toughness under blasting loads[J].Chinese Journal of Rock Mechanics And Engineering, 2015(suppl 1):2767-2772.
[12]	Zhu Z M, Xu W T, Feng R Q.A new method for measuring mode-Ⅰ dynamic fracture toughness of rock under blasting loads[J].Experimental Techniques, 2016, 40(3), 889-905. doi: 10.1007%2Fs40799-016-0093-x
[13]	Chong K P, Kuruppu M D.New specimen for fracture toughness determination of rock and other materials[J].International Journal of Fracture, 1984, 26:59-62. doi: 10.1007/BF01157555
[14]	李清, 杨仁树.爆炸载荷裂纹扩展的应力强度因子及其断裂行为[J].煤炭学报, 2002, 27(3):290-293. doi: 10.3321/j.issn:0253-9993.2002.03.015 LI Qing, YANG Renshu.Stress intensity factor and fracture behavior for crack propagation under blasting load[J].Journal Of China Coal Society, 2002, 27(3):290-293. doi: 10.3321/j.issn:0253-9993.2002.03.015
[15]	WANG Q Z, XING L.Determination of fracture toughness KIC by using the flattened Brazilian disc specimen for rocks[J].Engineering Fracture Mechanics, 1999, 64(2):193-201. doi: 10.1016/S0013-7944(99)00065-X
[16]	YANG S, TANG T X, ZOLLINGER D, et al.Splitting tension tests to determine concrete fracture parameters by peak-load method[J].Advanced Cement Based Materials, 1997, 5:18-28. doi: 10.1016/S1065-7355(97)90011-0
[17]	ZHU Z M, MOHANTY B, XIE H P.Numerical investigation of blasting-induced crack initiation and propagation in rocks[J].International Journal of Rock Mechanics and Mining Sciences, 2007, 44(3):412-424. doi: 10.1016/j.ijrmms.2006.09.002
[18]	ZHU Z M, XIE H P, MOHANTY B.Numerical investigation of blasting-induced damage in cylindrical rocks[J].International Journal of Rock Mechanics and Mining Sciences, 2008, 45(2):111-121. doi: 10.1016/j.ijrmms.2007.04.012
[19]	朱哲明, 李元鑫, 周志荣, 等.爆炸荷载下缺陷岩体的动态响应[J].岩石力学与工程学报, 2011, 30(6):1157-1167. http://d.old.wanfangdata.com.cn/Periodical/yslxygcxb201106009 ZHU Zheming, LI Yuanxin, ZHOU Zhirong, et al.Dynamic response of defected rock under blasting load[J].Chinese Journal of Rock Mechanics and Engineering, 2011, 30(6):1157-1167. http://d.old.wanfangdata.com.cn/Periodical/yslxygcxb201106009
[20]	ZHU Z M, WANG C, KANG J M.Study on the mechanism of zonal disintegration around an excavation[J].International Journal of Rock Mechanics and Mining Sciences, 2014, 67(4):88-95. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=JJ0232596842
[21]	王蒙, 朱哲明, 谢军.岩石Ⅰ-Ⅱ复合型裂纹动态扩展SHPB实验及数值模拟研究[J].岩石力学与工程学报, 2015, 34(12):2474-2485. WANG Meng, ZHU Zheming, XIE Jun.Experimental and numerical studies of the mixed-mode Ⅰ andⅡcrack propagation under dynamic loading using SHPB[J].Chinese Journal of Rock Mechanics and Engineering, 2015, 34(12):2474-2485.
[22]	ROSSMANITH H P, DAEHNKE A, KNASSMILLNER R E K, et al.Fracture mechanics applications to drilling and blasting[J].Fatigueand Fracture Engineering Materials and Structures, 1997, 20(11):1617-1636. doi: 10.1111/ffe.1997.20.issue-11
[23]	KUTTER H K, FAIRHURST C.On the fracture process in blasting[J].International Journal of Rock Mechanics and Mining Sciences, 1971, 8:181-202. doi: 10.1016/0148-9062(71)90018-0
[24]	WANG M, ZHU Z M, DONG Y Q, et al.Study of mixed-mode Ⅰ/Ⅱ fractures using single cleavage semicircle specimens under impacting loads[J].Engineering Fracture Mechanics, 2017, 177:33-44. doi: 10.1016/j.engfracmech.2017.03.042
[25]	宋力, 胡时胜.SHPB数据处理中的二波法与三波法[J].爆炸与冲击, 2005, 25(4):368-373. doi: 10.3321/j.issn:1001-1455.2005.04.014 SONG Li, HU Shisheng.Two-wave and three-wave method in SHPB data processing[J].Explosion and Shock Waves, 2005, 25(4):368-373. doi: 10.3321/j.issn:1001-1455.2005.04.014
[26]	岳中文.缺陷介质爆生裂纹扩展规律的动态焦散线试验研究[D].北京: 中国矿业大学(北京), 2009.
[27]	郭伟国.应力波基础简明教程[M].西安:西北工业大学出版社, 2007:44-52.