冲击荷载下层理对页岩内裂纹扩展行为影响规律的研究

doi:10.13722/j.cnki.jrme.2019.0111

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (1153 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要为了研究冲击荷载作用下页岩的断裂特性及层理对裂纹扩展行为的影响规律，基于实验–数值法，采用大直径分离式霍普金森压杆(SHPB)加载系统分别对0°，30°，45°，60°及90°层理倾角的页岩侧开单裂纹三角孔板构型试件(single cleavage triangle，SCT)进行动态冲击实验，并借助AUTODYN有限差分软件采用复合层状岩石模型对裂纹扩展过程进行数值模拟。实验结果表明，层理对裂纹扩展方向及试件破坏形态影响显著。裂纹的扩展速度与加载速率整体上呈正相关关系，加载速率较低的情况下裂纹停滞现象容易发生。沿层理面开裂是页岩等层状类岩石主要的破坏形式，但是次生裂纹的起点并不完全随机，实验发现裂纹扩展速度减缓处是次生裂纹起萌的高发区域。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	王兴渝1
	2
	朱哲明1
	2
	邱豪1
	2
	万端莹1
	2
	王飞1
	2
	王蒙1
	2

关键词 ：岩石力学, 断裂韧度, 页岩, SHPB实验, 层理, 加载速率, 数值模拟

Abstract：In order to study the dynamic fracture characteristics and the effect of stratifications on crack porpagation behaviors in shale，the dynamic loading experiments with split Hopkinson pressure bar(SHPB) equipment were conducted on single cleavage triangle(SCT) shale specimens with different inclinations of 0°，30°，45°，60° and 90°，and the crack propagation process was simulated adopting the dynamic numerical analysis code AUTODYN by regarding shale as a composite layered material. The results show that stratifications significantly affect the crack propagation direction and the fracture morphology of the specimens. It is also revealed that the crack propagation speed correlates positively with the loading speed as a whole while that crack deceleration is likely to occur when the loading speed is lower. Cracking along the stratification plane is the main failure mode of layered rocks such as shale，but the generation of secondary cracks is not completely random. It is also found that the region of crack deceleration usually has a high probability of secondary crack initiation.

Key words： rock mechanics dynamic fracture toughness shale SHPB stratifications loading speed numerical simulation

引用本文:

王兴渝1，2，朱哲明1，2，邱豪1，2，万端莹1，2，王飞1，2，王蒙1，2. 冲击荷载下层理对页岩内裂纹扩展行为影响规律的研究[J]. 岩石力学与工程学报, 2019, 38(8): 1542-1556.
WANG Xingyu1，2，ZHU Zheming1，2，QIU Hao1，2，WAN Duanying1，2，WANG Fei1，2，WANG Meng1，2. Study of the effect of stratifications on crack propagation behaviors in shale under impacting loads. , 2019, 38(8): 1542-1556.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2019.0111 或 http://www.rockmech.org/CN/Y2019/V38/I8/1542

[1]	黄书岭，徐劲松，丁秀丽，等. 考虑结构面特性的层状岩体复合材料模型与应用研究[J]. 岩石力学与工程学报，2010，29(4)：743-756.(HUANG Shuling，XU Jingsong，DING Xiuli，et al. Study of layered rock mass composite model based on characteristics of structural plane and its application[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(4)：743-756.(in Chinese))
[3]	姚光华，陈乔，刘洪，等. 渝东南下志留统龙马溪组层理性页岩力学特性试验研究[J]. 岩石力学与工程学报，2015，34(增1)：3 313- 3 319.(YAO Guanghua，CHEN Qiao，LIU Hong，et al. Experiment study on mechanical properties of bedding shale in lower silurian longmaxi shale southeast chongqing[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(Supp.1)：3 313-3 319.(in Chinese))
[5]	CHEN Z，CHEN M，JIN Y，et al. Determination of rock fracture toughness and its relationship with acoustic velocity[J]. International Journal of Rock Mechanics and Mining Sciences，1997，34(3)：49.e1-49.e11.
[7]	吕有厂. 层理性页岩断裂韧性的加载速率效应试验研究[J]. 岩石力学与工程学报，2018，37(6)：1 359-1 370.(LYU Youchang. Effect of bedding plane direction on fracture toughness of shale under different loading rates[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(6)：1 359-1 370.(in Chinese))
[8]	龚爽，赵毅鑫. 层理对煤岩动态断裂及能量耗散规律影响的试验研究[J]. 岩石力学与工程学报，2017，36(增2)：3 723-3 731. (GONG Shuang，ZHAO Yixin. Effects of bedding on fracture characteristics and energy dissipation of coal under impact loading[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(Supp.2)：3 723-3 731.(in Chinese))
[10]	AWAJI H，SATO S. Combined mode fracture toughness measurement by the disk test[J]. Journal of Engineering Materials and Technology Transactions of the Asme，1978，100(2)：175.
[28]	FREUND L B，HUTCHINSON J W. Dynamic fracture mechanics[J]. Journal of Applied Mechanics，1992，59(1)：245.
[11]	AYATOLLAHI M R，ALIHA M R M. Wide range data for crack tip parameters in two disc-type specimens under mixed mode loading[J]. Computational Materials Science，2007，38(4)：660-670.
[13]	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，2016，48(2)：57-65.(WANG Meng，ZHU Zheming，HU Rong. Rock experiments study of crack propagation under I mode and I-II mixed-mode dynamic loading using SCSCC specimens[J]. Journal of Sichuan University：Engineering Science，2016，48(2)：57-65.(in Chinese))
[15]	DONG Y Q，ZHU Z M，ZHOU L，et al. Study of mode I crack dynamic propagation behaviour and rock dynamic fracture toughness by using SCT specimens[J]. Fatigue and Fracture of Engineering Materials and Structures，2018，41(8)：1 810-1 822.
[18]	WANG Q Z，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)：2 455-2 469.
[20]	ZHANG Q B，ZHAO J. Determination of mechanical properties and full-field strain measurements of rock material under dynamic loads[J]. International Journal of Rock Mechanics and Mining Sciences，2013， 60(8)：423-439.
[21]	ZHU Z，MOHANTY B，XIE H. 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.
[23]	ZHU Z. Numerical prediction of crater blasting and bench blasting[J]. International Journal of Rock Mechanics and Mining Sciences，2009， 46(6)：1 088-1 096.
[25]	KOLSKY H. An investigation of the mechanical properties of materials at very high rates of loading[J]. Proceedings of the Physical Society B，2002，62(11)：676.
[6]	陈建国，邓金根，袁俊亮，等. 页岩储层I，II型断裂韧性评价方法研究[J]. 岩石力学与工程学报，2015，34(6)：1 101-1 105.(CHEN Jianguo，DENG Jingen，YUAN Junliang，et al. Determination of fracture toughness of modes I and II of shale formation[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(6)：1 101- 1 105.(in Chinese))
[16]	WANG M，ZHU Z M，DONG Y Q，et al. Study of mixed-mode I/II fractures using single cleavage semicircle compression specimens under impacting loads[J]. Engineering Fracture Mechanics，2017，177：33-44.
[26]	章根德，朱维耀. 岩土介质横观各向同性的模拟[J]. 力学进展，1998，28(4)：499-508.(ZHANG Gende，ZHU Weiyao. Modelling for transversely isotropic behaviour of rock/soil[J]. Advances in Mechanics，1998，28(4)：499-508.(in Chinese))
[4]	MORGAN S P，EINSTEIN H H. Cracking processes affected by bedding planes in Opalinus shale with flaw pairs[J]. Engineering Fracture Mechanics，2017，176：213-234.
[14]	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)：2 474-2 485.(WANG Meng，ZHU Zheming，XIE Jun. Experimental and numerical studies of the mixed-mode I and II crack propagation under dynamic loading using SHPB[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(12)：2 474-2 485.(in Chinese))
[24]	ZHU Z M，WANG C，KANG J M，et al. Study on the mechanism of zonal disintegration around an excavation[J]. International Journal of Rock Mechanics and Mining Sciences，2014，67(4)：88-95.
[2]	贾长贵，陈军海，郭印同，等. 层状页岩力学特性及其破坏模式研究[J]. 岩土力学，2013，34(增2)：57-61.(JIA Changgui，CHEN Junhai，GUO Yintong，et al. Research on mechanical behaviors and failure modes of layer shale[J]. Rock and Soil Mechanics，2013，34(Supp.2)：57-61.(in Chinese))
[9]	刘晓辉，戴峰，刘建锋，等. 考虑层理方向煤岩的静动巴西劈裂试验研究[J]. 岩石力学与工程学报，2015，34(10)：2 098-2 105. (LIU Xiaohui，DAI Feng，LIU Jianfeng，et al. Brazilian splitting tests on coal rock considering bedding direction under static and dynamic loading rate[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(10)：2 098-2 105.(in Chinese))
[12]	CHONG K P，KURUPPU M D. New specimen for fracture toughness determination for rock and other materials[J]. International Journal of Fracture，1984，26(2)：R59-R62.
[19]	JIANG F，VECCHIO K S. Hopkinson bar loaded fracture experimental technique：a critical review of dynamic fracture toughness tests[J]. Applied Mechanics Reviews，2009，62(6)：1 469-1 474.
[22]	ZHU Z，XIE H，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.
[17]	WANG X M，ZHU Z M，WANG M，et al. Study of rock dynamic fracture toughness by using VB-SCSC specimens under medium-low speed impacts[J]. Engineering Fracture Mechanics，2017，181：52-64.
[27]	LYSMER J，KUHLEMEYER R L. Finite dynamic model for infinite media[J]. Journal of the Engineering Mechanics Division，1969，95(4)：859-878.