On the use of Brazilian disc specimen for calculating mixed mode I-II fracture toughness of rock materials

被引：255

作者：

Ayatollahi, M. R. ^{[1
]}

Aliha, M. R. M. ^{[1
]}

机构：

[1] Iran Univ Sci & Technol, Dept Mech Engn, Fatigue & Fracture Lab, Tehran 16846, Iran

来源：

ENGINEERING FRACTURE MECHANICS | 2008年 / 75卷 / 16期

关键词：

Rock materials; Brittle fracture; Mixed mode loading; Brazilian disc specimen;

D O I：

10.1016/j.engfracmech.2008.06.018

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The centrally cracked Brazilian disc specimen has been used frequently in the past for investigating mixed mode I-II fracture toughness in rock materials. However, a review of the available test results reveals that the conventional fracture criteria like the maximum tangential stress criterion always underestimate the mixed mode I-II fracture toughness data obtained from the Brazilian disc specimen. In this paper, a generalized maximum tangential stress criterion which takes into account the effects of the three fracture parameters K-I, K-II and T-stress is used for predicting the mixed mode fracture toughness data available in the literature for several types of rock materials tested with the Brazilian disc specimen. It is shown that the generalized maximum tangential stress criterion provides significantly improved predictions for the experimental results. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：4631 / 4641

页数：11

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