含不同张开角度裂纹结构的动态断裂实验研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (18) : 130-137.

论文

梁欣桐1，肖成龙2，范嘉宾3，郭啸4，陈文1，丁晨曦1

作者信息 +

Dynamic fracture experiment on the structures with open cracks with different open angles

LIANG Xintong1，XIAO Chenglong2，FAN Jiabin3，GUO Xiao4，CHEN Wen1，DING Chenxi1

Author information +

文章历史 +

摘要

不同结构的动态断裂行为受多个因素影响，其中裂纹缺陷对其影响最为显著。张开型裂纹是工程结构中十分常见的缺陷，而且张开角度往往并不固定。为研究结构的运动裂纹与不同预制角度裂纹相互作用的规律，以张开角度为单一变量，采用动态焦散线实验系统，在冲击荷载下对含不同张开角度裂纹的有机玻璃试件进行三点弯实验。研究发现：（1）裂纹扩展经过不同张开角度的预制裂纹时，都会先扩展至预制裂纹夹角尖端，再从预制裂纹其中一端重新蓄能起裂，然后偏向落锤点方向扩展，最终贯穿整个试件；（2）开口向上的预制裂纹会增加运动裂纹的扩展时长，而且预制裂纹的开口角度越大，对裂纹扩展产生的迟滞效应越大，裂纹贯穿试件的总时长越大；（3）与预制裂纹相互作用阶段，动态裂纹都会先减速后增速至峰值，预制裂纹角度越大，裂纹扩展速度峰值越小，且当预制裂纹角度为180°时的峰值与无预制裂缝试件的峰值非常接近；（4）运动裂纹再次从预制裂纹尖端处起裂时裂纹尖端应力强度因子迅速大幅增加后又迅速减小直至试件完全断裂。

Abstract

Open crack is quite common in engineering structures, while its open angle is uncertain. The existence of crack defects has a significant effect on the dynamic fracture behavior of structures. To study the interaction between the running crack and the prefabricated crack with different open angles, the open angle was set as the single variable in the experiment. The dynamic caustics experiment system was used to conduct the three-point bending experiment on PMMA specimens under impact load. The results show that :(1) When the crack propagates through the prefabricated crack, it always propagates to one of the ends of the prefabricated crack, then propagates from the end toward the drop hammer point, and finally penetrates through the whole specimen. (2) The prefabricated crack with upward open crack will increase the propagation time of the running crack. The larger the open angle of the prefabricated crack, the larger the hysteresis effect on the crack propagation, and the longer the total duration of the crack penetration. (3) During the interaction with the prefabricated crack, the dynamic crack propagation velocity firstly slows down and then increases to the peak. The larger the prefabricated crack angle, the smaller the peak of crack propagation velocity. Meanwhile, the peak value of the specimen with 180° open crack is very close to that of the specimen without prefabricated crack. (4) When the running crack initiates again from the end of the prefabricated crack, the stress intensity factor at the crack tip increases rapidly and then decreases rapidly until the specimen completely breaks.

导出引用

梁欣桐1，肖成龙2，范嘉宾3，郭啸4，陈文1，丁晨曦1. 含不同张开角度裂纹结构的动态断裂实验研究[J]. 振动与冲击, 2023, 42(18): 130-137

LIANG Xintong1，XIAO Chenglong2，FAN Jiabin3，GUO Xiao4，CHEN Wen1，DING Chenxi1. Dynamic fracture experiment on the structures with open cracks with different open angles[J]. Journal of Vibration and Shock, 2023, 42(18): 130-137

参考文献

[1] 丁黄平. 节理裂隙岩体隧道爆破成型效果研究[D].长春：吉林大学,2009.
Ding Huangping. Study on the Shaping Effect of Jointed Rock Mass Under Blasting in Tunnel [D]. Jiling:Jilin University,2009.
[2] Yang Renshu, Xu Peng, Yue Zhongwen,et al. Dynamic fracture analysis of crack–defect interaction for mode I running crack using digital dynamic caustics method[J]. Engineering Fracture Mechanics, 2016,161(161):63-75.
[3] Wu Zhijun and Wong Louis Ngai Yuen. Investigating the effects of micro-defects on the dynamic properties of rock using Numerical Manifold method[J]. Construction and Building Materials,2014,72(72):72-82.
[4] Zhou Qin, Zhu Zheming, Wang Xiong,et al. The effect of a pre‐existing crack on a running crack in brittle material under dynamic loads[J]. Fatigue & Fracture of Engineering Materials & Structures,2019,42(11):2544-2557.
[5] Li Meng, Zhu Zheming, Liu Ruifeng,et al. Study of the effect of empty holes on propagating cracks under blasting loads[J]. International Journal of Rock Mechanics and Mining Sciences,2018,103(103):186-194.
[6] 杨仁树,王雁冰. 切缝药包不耦合装药爆破爆生裂纹动态断裂效应的试验研究[J]. 岩石力学与工程学报,2013,32(07):1337-1343.
Yang Renshu, Wang Yanbing. Experimental study of dynamic fracture effect of crack in slotted cartridge decoupling charge blasting[J]. Chinese Journal of Rock Mechanics and Engineering, 2013,32(07):1337-1343.
[7] 杨仁树,陈程,王煦,等. 不同直径空孔对爆生裂纹扩展行为影响规律的实验研究[J]. 煤炭学报,2017,42(10):2498-2503.
Yang Renshu, Cheng Cheng, Wang Xu,et al. Experimental investigation on the influence of different diameter empty holes on the crack growth behavior of blasting[J], Journal of China Coal Society, 2017,42(10):2498-2503.
[8] 郭东明,闫鹏洋,杨仁树,等. 爆破开挖中巷道围岩缺陷扩展的动焦散模型试验研究[J]. 采矿与安全工程学报,2015,32(05):728-734.
Guo Dongming, Yan Pengyang, Yang Renshu,et al. Dynamic caustics model experimental study on the defects extension of roadway surrounding rock when blasting excavation[J]. Journal of Mining & Safety Engineering, 2015,32(05):728-734.
[9] 岳中文,张士春,邱鹏,等. 装药结构对切缝药包爆破效果影响的研究[J]. 振动与冲击,2018,37(10):27-34.
Yue Zhongwen, Zhang Shichun, Qiu Peng,et al. Influence of charge structures on the slotted cartridge blasting effect[J], Journal of Vibration and Shock, 2018,37(10):27-34.
[10] 岳中文,郭洋,许鹏,等. 定向断裂控制爆破爆生裂纹扩展机理的实验研究[J]. 工程力学,2016,33(02):50-58.
Yue Zhongwen, Guo Yang, Xu Peng,et al. Experimental study on the mechanism of blast-induced crack propagation under directional fracture controlled blasting[J]. Engineering Mechanics, 2016,33(02):50-58.
[11] 郭东明,闫鹏洋,杨仁树,等. 动静荷载下巷道围岩倾斜裂纹的动焦散试验[J]. 采矿与安全工程学报,2016,33(04):668-675.
Guo Dongming,Yan Pengyang,Yang Renshu,et al. Dynamic caustics test on the inclined cracks in roadway surrounding rock subjected to static-dynamic load[J]. Journal of Mining & Safety Engineering, 2016,33(04):668-675.
[12] 郭东明,闫鹏洋,薛磊,等.动静载荷下巷道围岩裂纹扩展规律的试验研究[J].矿业科学学报,2016,1(02):146-154.
Guo Dongming,Yan Pengyang, Xue Lei,et al. The experimental research on the propagation laws of cracks in roadway surrounding rock subjected to static-dynamic load [J]. Journal of Mining Science and Technology, 2016, 1(02):146-154.
[13] 沈世伟,廖文旺,徐燕,等. 不同节理间距条件下岩体双孔爆破动焦散试验研究[J]. 煤炭学报,2018,43(08):2180-2186.
Shen Shiwei, Liao Wenwang, Xu Yan,et al. Dynamic caustics test of rock mass under different joint spacing conditions with two-hole blasting[J]. Journal of China Coal Society, 2018,43(08):2180-2186.
[14] 杨仁树,苏洪. 爆炸荷载下含预裂缝的裂纹扩展实验研究[J]. 煤炭学报,2019,44(02):482-489.
Yang Renshu, Su Hong. Experimental study on crack propagation with pre-crack under explosion load[J]. Journal of China Coal Society,2019,44(02):482-489.
[15] 杨仁树,郭洋,李清,等. 中间起爆柱状药包爆炸应力应变场演化规律[J]. 煤炭学报,2019,44(11):3423-3431.
Yang Renshu, Guo Yang, Li,Qing Peng Xu,et al. Evolution law on explosive stress and strain field of column charges at middle detonation position[J]. Journal of China Coal Society, 2019,44(11):3423-3431.
[16] 刘康,郭东明,张英实,等.爆炸载荷下邻近巷道围岩裂纹贯穿过程研究[J]. 爆破,2019,36(02):26-32.
Liu Kang,Guo Dongming, Zhang Yingshi,et al. Study on Crack Penetration Process of Surrounding Rock of Adjacent Roadway under Blast Loading[J]. Blasting,2019,36(02):26-32.
[17] 苏洪,龚悦,杨仁树,等. 爆炸荷载作用下预裂缝宽度对裂纹扩展的影响[J]. 中国矿业大学学报,2021,50(03):579-586.
Su Hong,Gong Yue, Yang Renshu,et al. Influence of pre-splitting crack width on crack propagation under blast loading[J].Journal of China University of Mining & Technology, 2021,50(03):579-586.
[18] 丁晨曦,杨仁树,陈程,等.切缝药包爆破定向裂纹与张开节理相互作用的实验研究[J]. 工程科学学报,2021,43(07):894-902.
Ding Chenxi, Yang Renshu,Cheng Cheng,et al. Experimental study of the interaction of directional crack and open joint in slit charge blasting[J].Chinese Journal of Engineering, 2021,43(07):894-902.
[19] 李清,曹怀建,杨鸣泽,等.含偏置裂纹材料断裂韧性的焦散线实验测试[J].矿业科学学报,2017,2(03):243-250.
Li Qing, Cao Huaijian, Yang Mingze,et al. Experimental investigation on dynamic fracture toughness of offset crack material using caustic method[J]. Journal of Mining Science and Technology, 2017,2(03):243-250.
[20] 康一强,张祥,贾文豪,等.张开型节理角度和长度对类岩石材料动力学特性的影响[J].矿业科学学报,2022,7(03):296-303.
Kang Yiqiang, Zhang Xiang, Jia Wenhao,et al. Effects of dip angle and length of open joints on dynamic properties of materials like rock[J]. Journal of Mining Science and Technology, 2022,7(03):296-303.
[21] 许鹏，陈程，郭洋，等.含垂直层理介质在切缝药包爆破下裂纹扩展行为的试验研究].矿业科学学报，2019,4(6)：498-505.
Xu Peng,Chen Cheng,Guo Yang,et al.Experimental study on crack propagation of slit charge blasting in media with vertical bedding plane Journal of Mining Science and Technology, 2019,4(6):498-505.
[22] 杨立云,杨仁树,许鹏. 新型数字激光动态焦散线实验系统及其应用[J]. 中国矿业大学学报,2013,42(02):188-194.
Yang Liyun, Yang Renshu, Xu Peng.Caustics method combined with laser & digital high-speed camera and its applications[J]. Journal of China University of Mining & Technology, 2013,42(02):188-194.
[23] 杨仁树,王雁冰,岳中文,等. 定向断裂双孔爆破裂纹扩展的动态行为[J]. 爆炸与冲击,2013,33(06):631-637.
Yang Renshu, Wang Yanbing, Yue Zhongwen,et al..Dynamic behaviors of crack propagation in directional fracture blasting with two holes[J]. Explosion and Shock Waves, 2013,33(06):631-637.
[24] 杨仁树,陈程,赵勇,等. 空孔-裂纹偏置方式对PMMA冲击断裂动态行为的影响[J]. 振动与冲击,2018,37(20):122-128.
Renshu Yang, Cheng Cheng,Yong Zhao,et al. Influence of the void-crack offset method on the dynamic behavior of PMMA during impact fracture[J]. Journal of Vibration and Shock, 2018,37(20):122-128.
[25] Wang Chao, Zhu Zhe Ming and Zheng Tao. The Fracturing Behavior of Detected Rock under Blasting Loads[J]. Applied Mechanics and Materials,2011,142(142):193-196.
[26] 郭东明,刘康,杨仁树,等. 爆破对邻近巷道背爆侧倾斜裂纹影响实验研究[J]. 采矿与安全工程学报,2015,32(01):99-104.
Guo Dongming, Liu Kang,Yang Renshu,et al. Experimental research on the influence of blasting on the inclined crack in the back-blasting side of nearby roadway[J].Journal of Mining & Safety Engineering,2015,32(01):99-104.
[27] 周磊,朱哲明,董玉清,等. 巷道内径向裂纹在冲击载荷作用下的起裂与扩展研究[J]. 采矿与安全工程学报,2019,36(02):256-264.
Zhou Lei, Zhu Zheming, Dong Yuqing,et al. Study on radical crack initiation and propagation behavior around roadway under dynamic loading[J]. Journal of Mining & Safety Engineering,2019,36(02):256-26.