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.
机构:
Sichuan Univ, Coll Water Resources & Hydropower, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Sichuan, Peoples R ChinaSichuan Univ, Coll Water Resources & Hydropower, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Sichuan, Peoples R China
Dai, F.
;
Xia, K. W.
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机构:
Tianjin Univ, Sch Civil Engn, State Key Lab Hydraul Engn Simulat & Safety, Tianjin 300072, Peoples R China
Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4, CanadaSichuan Univ, Coll Water Resources & Hydropower, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Sichuan, Peoples R China
机构:
Peking Univ, LTCS, Beijing 100871, Peoples R China
Peking Univ, Coll Engn, Beijing 100871, Peoples R China
Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4, CanadaPeking Univ, LTCS, Beijing 100871, Peoples R China
Gao, G.
;
Huang, S.
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机构:
Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4, CanadaPeking Univ, LTCS, Beijing 100871, Peoples R China
Huang, S.
;
Xia, K.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4, CanadaPeking Univ, LTCS, Beijing 100871, Peoples R China
Xia, K.
;
Li, Z.
论文数: 0引用数: 0
h-index: 0
机构:
Peking Univ, LTCS, Beijing 100871, Peoples R China
Peking Univ, Coll Engn, Beijing 100871, Peoples R ChinaPeking Univ, LTCS, Beijing 100871, Peoples R China
机构:
Sichuan Univ, Coll Water Resources & Hydropower, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Sichuan, Peoples R ChinaSichuan Univ, Coll Water Resources & Hydropower, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Sichuan, Peoples R China
Dai, F.
;
Xia, K. W.
论文数: 0引用数: 0
h-index: 0
机构:
Tianjin Univ, Sch Civil Engn, State Key Lab Hydraul Engn Simulat & Safety, Tianjin 300072, Peoples R China
Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4, CanadaSichuan Univ, Coll Water Resources & Hydropower, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Sichuan, Peoples R China
机构:
Peking Univ, LTCS, Beijing 100871, Peoples R China
Peking Univ, Coll Engn, Beijing 100871, Peoples R China
Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4, CanadaPeking Univ, LTCS, Beijing 100871, Peoples R China
Gao, G.
;
Huang, S.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4, CanadaPeking Univ, LTCS, Beijing 100871, Peoples R China
Huang, S.
;
Xia, K.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4, CanadaPeking Univ, LTCS, Beijing 100871, Peoples R China
Xia, K.
;
Li, Z.
论文数: 0引用数: 0
h-index: 0
机构:
Peking Univ, LTCS, Beijing 100871, Peoples R China
Peking Univ, Coll Engn, Beijing 100871, Peoples R ChinaPeking Univ, LTCS, Beijing 100871, Peoples R China