Dynamic tensile failure of rocks under static pre-tension

被引：97
作者：
Wu, Bangbiao [1 ,2 ,3 ]
Chen, Rong [4 ]
Xia, Kaiwen [1 ,2 ,3 ]
机构：
[1] Tianjin Univ, Sch Civil Engn, State Key Lab Hydraul Engn Simulat & Safety, Tianjin 300072, Peoples R China
[2] Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4, Canada
[3] Univ Toronto, Lassonde Inst, Toronto, ON M5S 1A4, Canada
[4] Natl Univ Def Technol, Coll Sci, Changsha 410073, Hunan, Peoples R China
来源：
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES | 2015年 / 80卷
基金：
加拿大自然科学与工程研究理事会;
关键词：
Dynamic tensile strength; Pre-tension; Brazilian disc; SHPB; Rate dependence; HOPKINSON PRESSURE BAR; I FRACTURE-TOUGHNESS; STRESS-CONCENTRATION; SUGGESTED METHODS; CONCRETE; GRANITE; COMPRESSION; STRENGTH; BEHAVIOR; PARAMETERS;
D O I：
10.1016/j.ijrmms.2015.09.003
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
A modified split Hopkinson pressure bar (SHPB) system is utilized to load Brazilian disc (BD) samples statically, and then exert dynamic load to the sample generated by impact. The pulse shaper technique is used to generate a slowly rising stress wave to facilitate the dynamic force balance in dynamic tests. Five groups of Laurentian granite BD samples (with static tensile strength of 12.8 MPa) under the pre-tension of 0 MPa, 2 MPa, 4 MPa, 8 MPa, and 10 MPa were tested under different loading rates. The results show that the rock dynamic tensile strength decreases with the increase of the pre-tension. It is also observed that under the same pre-tension stress, the dynamic tensile strength increases with the loading rate. However, the total tensile strength of the rock is roughly independent of the pre-tension. The failure patterns of the samples also reveal the rate dependence of the dynamic tensile strength of rocks. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：12 / 18
页数：7
相关论文
共 50 条
[11]   Experiments to Determine Static and Dynamic Tensile Strength of Deccan Trap Rocks, India [J].
Malik, Akx ;
Chakraborty, Tanusree ;
Rao, K. S. ;
Kumar, D. .
ISRM EUROPEAN ROCK MECHANICS SYMPOSIUM EUROCK 2017, 2017, 191 :946-953
[12]   A wing-crack extension model for tensile response of saturated rocks under coupled static-dynamic loading [J].
Liu, Yi ;
Dai, Feng ;
Pei, Pengda .
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2021, 146
[13]   Effects of short fiber and pre-tension on the tensile behavior of basalt textile reinforced concrete [J].
Zhu, Deju ;
Liu, Sai ;
Yao, Yiming ;
Li, Gaosheng ;
Du, Yunxing ;
Shi, Caijun .
CEMENT & CONCRETE COMPOSITES, 2019, 96 :33-45
[14]   Experimental Investigation of the Dynamic Tensile Properties of Naturally Saturated Rocks Using the Coupled Static-Dynamic Flattened Brazilian Disc Method [J].
Liu, Xinying ;
Dai, Feng ;
Liu, Yi ;
Pei, Pengda ;
Yan, Zelin .
ENERGIES, 2021, 14 (16)
[15]   Experimental Study on the Temporal and Morphological Characteristics of Dynamic Tensile Fractures in Igneous Rocks [J].
Xu, Xuan ;
Chi, Li-Yuan ;
Yang, Jun ;
Yu, Qi .
APPLIED SCIENCES-BASEL, 2021, 11 (23)
[16]   Modelling of dynamic tensile failure of inclusion-bearing rocks [J].
Wang, Lu ;
Wu, Wei .
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES, 2022, 8 (05)
[17]   Different Compressive and Tensile Strength of Moulded Gypsum Under Various Strain Rates from Quasi-Static to Dynamic Regime [J].
Zou, C. ;
Wong, L. N. Y. .
GEOTECHNICAL TESTING JOURNAL, 2016, 39 (04) :596-607
[18]   IN-VIVO MEASUREMENT OF ARTERIAL PRE-TENSION [J].
GREEN, SI ;
SCHAJER, GS ;
PARKER, DR ;
POST, AJ ;
HSIANG, YNH .
MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING, 1995, 33 (06) :826-829
[19]   Static and dynamic tensile failure characteristics of rock based on splitting test of circular ring [J].
Li, Di-yuan ;
Wang, Tao ;
Cheng, Teng-jiao ;
Sun, Xiao-lei .
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, 2016, 26 (07) :1912-1918
[20]   Why are tensile cracks suppressed under dynamic loading?-Transition strain rate for failure mode [J].
Zou, Chunjiang ;
Li, Jianchun ;
Zhao, Xiaobao ;
Zhao, Jian .
EXTREME MECHANICS LETTERS, 2021, 49
12345