Dynamic strength and fracturing behavior of persistent fractured granite under dynamic loading

被引:2
作者
Gao, Guiyun [1 ,2 ]
Zhang, Kanghua [3 ]
Wang, Pu [3 ]
Xu, Ying [3 ]
Zhou, Hao [1 ,2 ]
Wang, Chenghu [1 ,2 ]
机构
[1] MEMC, Natl Inst Nat Hazards, Beijing 100085, Peoples R China
[2] Beijing Engn Res Ctr Earthquake Observat, Beijing 100085, Peoples R China
[3] Tianjin Univ, State Key Lab Hydraul Engn Intelligent Construct &, Tianjin 300350, Peoples R China
基金
中国国家自然科学基金;
关键词
Split Hopkinson pressure bar method; Dynamic strength; Stress wave propagation; Loading rate effect; Persistent fractured granite; Digital image correlation; STRESS WAVE-PROPAGATION; LABORATORY EARTHQUAKES; RED-SANDSTONE; PLANAR JOINT; SHPB TEST; ROCK; TOUGHNESS; ENERGY; PARAMETERS; SPECIMENS;
D O I
10.1007/s10064-024-03718-6
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Dynamic impact tests were performed to experimentally study the dynamic mechanical properties, stress wave propagation, energy evolution characteristics, and failure modes of persistent fractured granite with single-bonded and unbonded planar joints at three angles using the split Hopkinson pressure bar (SHPB) method and digital image correlation (DIC) method with an ultrahigh-speed camera. The results showed that the dynamic strength of the persistent fractured granite increased with increasing loading rate and decreased with increasing joint angle or joint lengths, while the wave attenuation is more significant at larger joint angles or longer joints. The variation in energy absorption was similar to the variation in dynamic strength, showing a positive correlation between energy absorption and dynamic strength. Moreover, as the joint angle increased from 20 degrees to 30 degrees, the failure mode gradually transformed from tensile- to shear-dominated failure. Combined with an ultrahigh-speed camera and the DIC method, the influencing mechanism of the joint angle and loading rate on the dynamic strength and failure mode was revealed.
引用
收藏
页数:23
相关论文
共 42 条
[1]   Dynamic Characterization of Orthogneiss Rock Subjected to Intermediate and High Strain Rates in Tension [J].
Cadoni, Ezio .
ROCK MECHANICS AND ROCK ENGINEERING, 2010, 43 (06) :667-676
[2]   Determination of dynamic fracture parameters using a semi-circular bend technique in split Hopkinson pressure bar testing [J].
Chen, R. ;
Xia, K. ;
Dai, F. ;
Lu, F. ;
Luo, S. N. .
ENGINEERING FRACTURE MECHANICS, 2009, 76 (09) :1268-1276
[3]   Laboratory measurements of the rate dependence of the fracture toughness anisotropy of Barre granite [J].
Dai, F. ;
Xia, K. W. .
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2013, 60 :57-65
[4]   Semicircular bend testing with split Hopkinson pressure bar for measuring dynamic tensile strength of brittle solids [J].
Dai, F. ;
Xia, K. ;
Luo, S. N. .
REVIEW OF SCIENTIFIC INSTRUMENTS, 2008, 79 (12)
[5]   Pulse shaping techniques for testing brittle materials with a split Hopkinson pressure bar [J].
Frew, DJ ;
Forrestal, MJ ;
Chen, W .
EXPERIMENTAL MECHANICS, 2002, 42 (01) :93-106
[6]   Investigation of the rate dependence of fracture propagation in rocks using digital image correlation (DIC) method [J].
Gao, G. ;
Yao, W. ;
Xia, K. ;
Li, Z. .
ENGINEERING FRACTURE MECHANICS, 2015, 138 :146-155
[7]   Application of Digital Image Correlation (DIC) in Dynamic Notched Semi-Circular Bend (NSCB) Tests [J].
Gao, G. ;
Huang, S. ;
Xia, K. ;
Li, Z. .
EXPERIMENTAL MECHANICS, 2015, 55 (01) :95-104
[8]   Experimental study of stress wave propagation and energy characteristics across rock specimens containing cemented mortar joint with various thicknesses [J].
Han, Zhenyu ;
Li, Diyuan ;
Zhou, Tao ;
Zhu, Quanqi ;
Ranjith, P. G. .
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2020, 131
[9]   Propagation of high amplitude stress waves through a filled artificial joint: An experimental study [J].
Huang, Xiaolin ;
Qi, Shengwen ;
Xia, Kaiwen ;
Zheng, Hong ;
Zheng, Bowen .
JOURNAL OF APPLIED GEOPHYSICS, 2016, 130 :1-7
[10]  
Jaeger J.C., 2007, FUNDAMENTALS ROCK ME, DOI DOI 10.1017/CBO9780511735349