FRACTURE-BEHAVIOR OF CARBON MATERIALS

被引：34

作者：

ALLARD, B ^{[1
]}

ROUBY, D ^{[1
]}

FANTOZZI, G ^{[1
]}

DUMAS, D ^{[1
]}

LACROIX, P ^{[1
]}

机构：

[1] SOC ELECTRODES & REFRACTAIRES SAVOIE,F-69631 VENISSIEUX,FRANCE

来源：

CARBON | 1991年 / 29卷 / 03期

关键词：

FRACTURE MECHANICS; CRACK GROWTH RESISTANCE; CARBON MATERIALS; MICROSTRUCTURE;

D O I：

10.1016/0008-6223(91)90215-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The present study deals with the fracture behaviour of anthracite-based carbon materials. As their behaviour is nonlinear and nonelastic, crack growth resistance curves (R-curves) are determined, and loading-unloading procedure in three-point bending on single-edge notch beams is used. To determine the correct specimen size, a preliminary study of the size effect is performed. The R-curves exhibit a typical shape showing three stages: an increase in growth energy due to process zone development; a plateau value corresponding to steady-state crack propagation, which is used in this study to characterize the behaviour; and a sharp increase of energy due to specimen edge effects. The influence of the microstructure, especially the particle type and orientation, is investigated. Microstructure with higher anthracite fraction leads to easier crack growth. The micromechanisms governing the crack growth conditions are described and discussed.

引用

页码：457 / 468

页数：12

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