Investigation of the rate dependence of fracture propagation in rocks using digital image correlation (DIC) method

被引：122
|
作者：
Gao, G. [1 ]
Yao, W. [2 ,3 ]
Xia, K. [2 ,3 ]
Li, Z. [4 ,5 ]
机构：
[1] Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
[2] Tianjin Univ, Sch Civil Engn, State Key Lab Hydraul Engn Simulat & Safety, Tianjin 300072, Peoples R China
[3] Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4, Canada
[4] Peking Univ, LTCS, Beijing 100871, Peoples R China
[5] Peking Univ, Coll Engn, Beijing 100871, Peoples R China
来源：
ENGINEERING FRACTURE MECHANICS | 2015年 / 138卷
基金：
加拿大自然科学与工程研究理事会;
关键词：
Dynamic fracture toughness; Fracture velocity; Digital image correlation; Loading rate; SHPB; NSCB; STRESS-INTENSITY FACTOR; DYNAMIC FRACTURE; CRACK-PROPAGATION; SUGGESTED METHOD; LOADING RATE; TOUGHNESS; PARAMETERS; INITIATION;
D O I：
10.1016/j.engfracmech.2015.02.021
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Loading rate is the main controlling factor in dynamic failure of rocks. In this paper, digital image correlation (DIC) combined with ultra-high speed photography is utilized to study the loading rate effect of a granitic rock - Laurentian granite using notched semi-circular bend (NSCB) method. The dynamic stress intensity factors and crack tip positions are determined from the displacement fields obtained using DIC. Fracture time, fracture toughness and crack growth velocity all exhibit loading rate dependence. The dependence of fracture propagation toughness on crack growth velocity is also obtained, which is in good agreement with that reported in the literature. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：146 / 155
页数：10
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