花岗岩动态断裂能各向异性试验研究

doi:10.13722/j.cnki.jrme.2016.1588

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摘要

由于微裂纹的存在以及长期构造应力下矿物晶粒排列所造成的自然各向异性，岩石的力学性质大多表现出各向异性的特点。研究选取Barre花岗岩和Standstead花岗岩，利用改装的分离式霍普金森压杆系统和国际岩石力学学会推荐的直切槽半圆盘弯曲试样，进行了花岗岩动态断裂能各向异性的试验。试验中根据纵波波速所确定的主方向制备岩石试样，每种岩石制备三组试样。试验采用波形整形技术实现动态力平衡，并利用激光测量裂缝表面张开位移。利用这些测量结果并结合能量分析，确定2种岩石样品的动态断裂能。研究结果表明，加载率在0～200 GPa·m^1/2/s范围，2种岩石三个方向的动态断裂能均随着加载率的增加而增加。在相同的加载率下，2种岩石的动态断裂参数具有明显的各向异性。2种岩石X方向(波速最小)的动态断裂能最小，Z方向(波速最大)的动态断裂能最大。此外，随着加载率的提高，2种岩石动态断裂能的各向异性差异越来越明显，这主要是由于高加载率下扩展过程中损伤区域的增大造成的。

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	徐颖1
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关键词 ：岩石力学, 花岗岩, I型裂纹, 动态断裂能, 各向异性

Abstract：

Due to pre-existing micro-cracks induced by the long-term tectonic loading，rock exhibits strong anisotropy. Using a split Hopkinson pressure bar(SHPB) system with International Society of Rock Mechanics (ISRM) suggested method for dynamic fracture test and the notched semi-circular bend(NSCB) specimen，the anisotropy of dynamic fracture energy of Barre granite and Standstead granite are investigated. The P-wave velocities of two rocks are measured to determine the three principal directions. The notches of the NSCB specimen are made along these three principal directions. Thus for each rock，three groups of NSCB specimens are fabricated. The pulse shaping technique was used to achieve dynamic force balance and a laser gap gauge was utilized to measure the crack surface opening distance(CSOD). Using these methods，the fracture energy for the specimen is determined using energy analysis. For samples in the same orientation group，the dynamic fracture energy of two rocks shows clear loading rate dependence，i.e. the fracture energy increases with the loading rate. The dynamic fracture energy is anisotropic for SG and BG. At the similar loading rate，the dynamic fracture energy for SG and BG along X direction is minimum and the fracture energy along Z direction is maximum. In addition，the fracture energy anisotropy of SG and BG increases with the loading rate. This is attributed to the increase of damage zone around the fracture path under higher loading rates.

Key words： rock mechanics granite mode-I fracture dynamic fracture energy anisotropy

引用本文:

徐颖1，ZHANG Junchen2，姚伟1，2，夏开文1，2. 花岗岩动态断裂能各向异性试验研究[J]. 岩石力学与工程学报, 2018, 37(S1): 3231-3238.
XU Ying1，ZHANG Junchen2，YAO Wei1，2，XIA Kaiwen1，2. Experimental study of dynamic fracture energy anisotropy of granitic rocks. , 2018, 37(S1): 3231-3238.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2016.1588 或 https://rockmech.whrsm.ac.cn/CN/Y2018/V37/IS1/3231

[1]	PHILLIPS W J P N. An introduction to mineralogy for geologists[M]. [S. l.]：John Wiley andSons，1980：25-38.
[2]	吴创周，石振明，付昱凯，等. 绿片岩各向异性蠕变特性试验研究[J]. 岩石力学与工程学报，2014，33(3)：493-499.(WU Chuangzhou，SHI Zhenming，FU Yukai，et al.Experimental investigations on structural anisotropy on creep of greenschist[J].Chinese Journal of Rock Mechanics and Engineering，2014，33(3)：493-499.(in Chinese))
[3]	唐杰. 各向异性岩石的静态模量与动态模量实验研究[J]. 岩石力学与工程学报，2014，33(增1)：3185-3191.(TANG Jie. Experimental study of static and dynamic moduli for anisotropic rock[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(Supp.1)：3185-3191.(in Chinese))
[4]	衡帅，杨春和，曾义金，等. 基于直剪试验的页岩强度各向异性研究[J]. 岩石力学与工程学报，2014，33(5)：874-883.(HENG Shuai，YANG Chunhe，ZENG Yijin，etal. Anisotropy of shear strength of shale based on direct shear test[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(5)：874-883.(in Chinese))
[5]	陈天宇，冯夏庭，张希巍，等. 黑色页岩力学特性及各向异性特性试验研究[J]. 岩石力学与工程学报，2014，33(9)：1772-1779.(CHEN Tianyu，FENG Xiating，ZHANG Xiwei，et al.Experimental study on mechanical and anisotropic properties of black shale[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(9)：1772-1779.(inChinese))
[6]	SCHEDL A，KRONENBERG A K，TULLIS J. Deformation microstructures of Barre granite：an optical，SEM and TEM study[J]. Tectonophysics，1986，122(1/2)：149-164.
[7]	陈颙，黄庭芳，刘恩儒. 岩石物理学[M]. 北京：中国科学技术大学出版社，2009：13-15.(CHEN Yong，HUANG Tingfang，LIU Enru. Rock physics[M]. Beijing：University of Science and Technology of China Press，2009：13-15.(in Chinese))
[8]	XIA K，YAO W. Dynamic rock tests using split Hopkinson(Kolsky) bar system-A review[J]. Journal of Rock Mechanics and Geotechnical Engineering，2015，7(1)：27-59.
[9]	KIRBY G C，MAZUR C J. Fracture toughness testing of coal[C]//Proceedings of the 26th US Rock Mechanics Symposium，Rapid City SD. Rotterdam：Balkema，1985：497-504.
[10]	CHEN C S，PAN E，AMADEI B. Fracture mechanics analysis of cracked discs of anisotropic rock using the boundary element method[J]. International Journal of Rock Mechanics and Mining Sciences，1998，35(2)：195-218.
[11]	NASSERI M H B，MOHANTY B，YOUNG R P. Fracture toughness measurements and acoustic emission activity in brittle rocks[J]. Pure and Applied Geophysics，2006，163(5/6)：917-945.
[12]	NASSERI M H B，MOHANTY B，ROBIN P Y F. Characterization of microstructures and fracture toughness in five granitic rocks[J]. International Journal of Rock Mechanics and Mining Sciences，2005，42(3)：450-460.
[13]	ZHANG Z X，KOU S Q，JIANG L G，et al. Effects of loading rate on rock fracture：fracture characteristics and energy partitioning[J]. International Journal of Rock Mechanics and Mining Sciences，2000，37(5)：745-762.
[14]	CHEN R，XIA K，DAI F，et al. Determination of dynamic fracture parameters using a semi-circular bend technique in split Hopkinson pressure bar testing[J]. Engineering Fracture Mechanics，2009，76(9)： 1268-1276.
[15]	DAI F，CHEN R，XIA K. A semi-circular bend technique for determining dynamic fracture toughness[J]. Experimental Mechanics，2010，50(6)：783-791.
[16]	ZHANG Q B，ZHAO J. Effect of loading rate on fracture toughness and failure micromechanisms in marble[J]. Engineering Fracture Mechanics，2013，102：288-309.
[17]	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(6)：423-439.
[18]	DAI F，XIA K W. Laboratory measurements of the rate dependence of the fracture toughness anisotropy of Barre granite[J]. International Journal of Rock Mechanics and Mining Sciences，2013，60(6)：57-65.
[19]	XIA K，NASSERI M H B，MOHANTY B，et al. Effects of microstructures on dynamic compression of Barre granite[J]. International Journal of Rock Mechanics and Mining Sciences，2008，45(6)：879-887.
[20]	DAI F，XIA K，LUO S N. Semicircular bend testing with split Hopkinson pressure bar for measuring dynamic tensile strength of brittle solids[J]. Review of Scientific Instruments，2008，79(12)：6.
[21]	SANO O，KUDO Y，MIZUTA Y. Experimental determination of elastic constants of Oshima granite，Barre granite，and Chelmsford granite[J]. Journal of Geophysical Research-Solid Earth，1992，97(B3)：3367-3379.
[22]	DOUGLASS P M V B. Anisotropy of granites：a reflection of microscopic fabric[J]. Geotechnique，1969，19(3)：22.
[23]	ZHOU Y X，XIA K，LI X B，et al. Suggested methods for determining the dynamic strength parameters and mode-I fracture toughness of rock materials[J]. International Journal of Rock Mechanics and Mining Sciences，2012，49(1)：105-112.
[24]	FREW D J，FORRESTAL M J，CHEN W. A split Hopkinson pressure bar technique to determine compressive stress-strain data for rock materials[J]. Experimental Mechanics，2001，41(1)：40-46.
[25]	FREW D J，FORRESTAL M J，CHEN W. Pulse shaping techniques for testing brittle materials with a split Hopkinson pressure bar[J]. Experimental Mechanics，2002，42(1)：93-106.
[26]	WEERASOORIYA T，MOY P，CASEM D，et al. A four-point bend technique to determine dynamic fracture toughness of ceramics[J]. Journal of the American Ceramic Society，2006，89(3)：990-995.
[27]	DAI F，XIA K，ZHENG H，et al. Determination of dynamic rock Mode-I fracture parameters using cracked chevron notched semi-circular bend specimen[J]. Engineering Fracture Mechanics，2011，78(15)：2633-2644.
[28]	SONG B，CHEN W. Energy for specimen deformation in a split Hopkinson pressure bar experiment[J]. Experimental Mechanics，2006，46(3)：407-410.