Rock Dynamic Fracture Characteristics Based on NSCB Impact Method

被引：6

作者：

Wang, Yanbing ^{[1
,2
,3
]}

机构：

[1] China Univ Min & Technol Beijing, Sch Mech & Architecture Engn, Beijing 100083, Peoples R China

[2] State Key Lab Geomech & Deep Underground Engn, Beijing 100083, Peoples R China

[3] Univ South Carolina, Dept Mech Engn, Columbia, SC 29208 USA

来源：

SHOCK AND VIBRATION | 2018年 / 2018卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

TOUGHNESS; STRENGTH; CHEVRON; COAL;

D O I：

10.1155/2018/3105384

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

In 2012, the International Society for Rock Mechanics (ISRM) recommended a new Notched Semicircular Bend (NSCB) method for the determination of dynamic fracture toughness of rock materials, but it did not consider the effect of some uncontrollable factors in the course of the experiment on the test result. This thesis firstly carried out dynamic fracture toughness experiments on several typical rock materials such as sandstone using the modified Split-Hopkinson Pressure Bar (SH PB) experimental system with high-speed photography, directly compared the dynamic fracture failure characteristics of several rock materials, and examined the loading rate dependency of the dynamic fracture toughness of rock materials. Based on the numerical analysis method of Discrete Lattice Spring Model (DLSM), it focused on the effect of bullet impact loading rate, loading area of incident bar, support restraints of clamping specimen, and other uncontrollable factors in the course of SHPB experiment on test results. The findings can be referenced for the improvement of NSCB method.

引用

页数：13

共 19 条

[1] Dynamic Fracture Properties of Rocks Subjected to Static Pre-load Using Notched Semi-circular Bend Method [J].

Chen, Rong ;

Li, Kang ;

Xia, Kaiwen ;

Lin, Yuliang ;

Yao, Wei ;

Lu, Fangyun .

ROCK MECHANICS AND ROCK ENGINEERING, 2016, 49 (10) :3865-3872

[2] Micromechanical model for the rate dependence of the fracture toughness anisotropy of Barre granite [J].

Dai, F. ;

Xia, K. ;

Nasseri, M. H. B. .

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2013, 63 :113-121

[3] 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

[4]

[李宁 LI Ning], 2006, [岩土工程学报, Chinese Journal of Geotechnical Engineering], V28, P460

[5] Study of the dynamic fracture characteristics of coal with a bedding structure based on the NSCB impact test [J].

Wang, Yanbing ;

Yang, Renshu .

ENGINEERING FRACTURE MECHANICS, 2017, 184 :319-338

[6] An experimental and theoretical assessment of semi-circular bend specimens with chevron and straight-through notches for mode I fracture toughness testing of rocks [J].

Wei, Ming-Dong ;

Dai, Feng ;

Xu, Nu-Wen ;

Zhao, Tao ;

Liu, Yi .

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2017, 99 :28-38

[7] Experimental and Numerical Study on the Cracked Chevron Notched Semi-Circular Bend Method for Characterizing the Mode I Fracture Toughness of Rocks [J].

Wei, Ming-Dong ;

Dai, Feng ;

Xu, Nu-Wen ;

Liu, Jian-Feng ;

Xu, Yuan .

ROCK MECHANICS AND ROCK ENGINEERING, 2016, 49 (05) :1595-1609

[8]

[杨立云 Yang Liyun], 2015, [岩石力学与工程学报, Chinese Journal of Rock Mechanics and Engineering], V34, P779

[9] Laboratory study of wave propagation due to explosion in a jointed medium [J].

Yang, Renshu ;

Wang, Yanbing ;

Ding, Chenxi .

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2016, 81 :70-78

[10]

[杨仁树 Yang Renshu], 2014, [岩石力学与工程学报, Chinese Journal of Rock Mechanics and Engineering], V33, P1971

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