Investigation of mixed mode brittle fracture in rounded-tip V-notched components

被引：104
|
作者：
Ayatollahi, M. R. [1 ]
Torabi, A. R. [1 ]
机构：
[1] Iran Univ Sci & Technol, Fatigue & Fracture Res Lab, Ctr Excellence Expt Solid Mech & Dynam, Dept Mech Engn, Tehran 16846, Iran
来源：
ENGINEERING FRACTURE MECHANICS | 2010年 / 77卷 / 16期
关键词：
Brittle fracture; Rounded-tip V-notch; RV-MTS criterion; RV-BD specimen; Mixed mode loading; STRESS INTENSITY FACTOR; FAILURE CRITERIA; ELASTIC-MATERIALS; SHARP NOTCHES; CRACK ONSET; U-NOTCHES; INITIATION; TOUGHNESS; SPECIMEN; STRENGTH;
D O I：
10.1016/j.engfracmech.2010.07.019
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A criterion is proposed for brittle fracture analysis in rounded-tip V-notched components. This criterion, called RV-MTS, is developed based on the maximum tangential stress (MTS) criterion proposed earlier for investigating mixed mode brittle fracture in sharp cracks. Using the RV-MTS criterion, a set of fracture curves is presented based on the notch stress intensity factors (NSIFs) for predicting mixed mode and also pure mode II fracture toughness of rounded-tip V-notches. The criterion is also able to predict fracture initiation angles under mixed mode loading. The validity of the criterion is evaluated by several fracture tests performed on the rounded-tip V-notched Brazilian disc (RV-BD) specimens made of PMMA. A good agreement is shown to exist between the theoretical predictions and the experimental results for various notch opening angles and different notch radii. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3087 / 3104
页数：18
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