Effect of loading rate on fracture toughness and failure micromechanisms in marble

被引：305

作者：

Zhang, Q. B. ^{[1
]}

Zhao, J. ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Sch Architecture Civil & Environm Engn, LMR, CH-1015 Lausanne, Switzerland

来源：

ENGINEERING FRACTURE MECHANICS | 2013年 / 102卷

基金：

瑞士国家科学基金会;

关键词：

Rate effect; Micro-measurements; Fracture toughness; Surface roughness; Failure mechanisms; DYNAMIC CRACK-PROPAGATION; MODE-I; STRESS-INTENSITY; ROCK; SURFACE; DEFLECTION; PARAMETERS; INITIATION; ROUGHNESS; PENETRATION;

D O I：

10.1016/j.engfracmech.2013.02.009

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Fracture experiments in a notched semi-circular bend configuration were conducted to characterize rate effects and failure micromechanisms of a marble using a servo-hydraulic machine and a modified split Hopkinson pressure bar. Three real-time measurement techniques were used to estimate crack propagation velocities and full-field deformation fields. Micro-measurement techniques were employed to qualitatively and quantitatively identify micrograph and surface morphology. Based on the theory of fracture mechanics, a micromechanical model was presented to examine the intergranular and transgranular fracture. The results indicated that fracture toughness and surface roughness were dependent on loading rate, which were induced by the intrinsic failure mechanisms. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：288 / 309

页数：22

共 71 条

[1]

[Anonymous], 1988, INT J ROCK MECH MIN, V25, P71

[2]

[Anonymous], 1999, Cracks and Fracture

[3]

[Anonymous], 2005, FRACTURE MECH FUNDAM

[4] RELATIONSHIPS BETWEEN FRACTURE PARAMETERS AND FRACTURE SURFACE-ROUGHNESS OF BRITTLE POLYMERS [J].