期刊
THEORETICAL AND APPLIED FRACTURE MECHANICS
卷 75, 期 -, 页码 59-69出版社
ELSEVIER
DOI: 10.1016/j.tafmec.2014.10.010
关键词
Brittle fracture; VO-notch; Notch fracture toughness; Mode II; Brazilian disk
In the present investigation, two brittle fracture criteria were suggested to predict the onset of brittle fracture in engineering components weakened by V-notches with end holes (VO-notches) under pure mode II loading. These criteria, called VO-MTS and VO-MS were developed based on the two well-known failure concepts of the maximum tangential stress (MTS) and the mean stress (MS), respectively. In order to evaluate the accuracy of the criteria, 72 new brittle fracture tests were conducted at room temperature on the new disk type specimen containing a central slit, called the VO-notched Brazilian disk (VO-BD) specimen, made of PMMA. First, the experimental fracture loads were converted to the corresponding mode I and mode II notch fracture toughness (NFT) values and the important ratio mode II NFT/mode I NFT was experimentally achieved. Then, the theoretical values of the ratio were predicted by means of the VO-MTS and the VO-MS criteria. It was found that both the criteria could provide very good predictions to the experimental results of the ratio mode II NFT/mode I NFT, as well as those of the fracture initiation angle. Also, found in this research was that one can utilize the critical distances of sharp crack in the fracture predictions of VO-notches. (C) 2014 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据