Determination of dynamic fracture parameters using a semi-circular bend technique in split Hopkinson pressure bar testing

被引：244

作者：

Chen, R. ^{[1
,2
,3
]}

Xia, K. ^{[1
,2
]}

Dai, F. ^{[1
,2
]}

Lu, F. ^{[3
]}

Luo, S. N. ^{[4
]}

机构：

[1] Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4, Canada

[2] Univ Toronto, Lassonde Inst, Toronto, ON M5S 1A4, Canada

[3] Natl Univ Def Technol, Coll Sci, Changsha 410073, Hunan, Peoples R China

[4] Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA

来源：

ENGINEERING FRACTURE MECHANICS | 2009年 / 76卷 / 09期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Dynamic fracture mechanics; Dynamic initiation toughness; Dynamic propagation toughness; Fracture velocity; PULSE SHAPING TECHNIQUES; ROCK FRACTURE; TOUGHNESS MEASUREMENTS; LOADING RATE; MODE-I; COMPRESSION; SPECIMEN; CERAMICS; PRECRACKING; BEHAVIOR;

D O I：

10.1016/j.engfracmech.2009.02.001

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Fracture initiation toughness, fracture energy, fracture propagation toughness, and fracture velocity are key dynamic fracture parameters. We propose a method to simultaneously measure these parameters for mode-l fractures in split Hopkinson pressure bar (SHPB) testing with a notched semi-circular bend (SCB) specimen. The initiation toughness is obtained from the peak load given dynamic force equilibrium. A laser gap gauge (LGG) is developed to monitor the crack surface opening displacement (CSOD) of the specimen, from which the fracture velocity and the fracture energy can be calculated. The feasibility of this methodology for coarse-grained solids is demonstrated with the SHPB-SCB experiments on Laurentian granite. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1268 / 1276

页数：9

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