期刊
INTERNATIONAL JOURNAL OF FATIGUE
卷 29, 期 9-11, 页码 1697-1701出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2007.01.013
关键词
anisotropy; fatigue; J-integral; directional solidified superalloy; crack path
The effect of local anisotropy due to the arrangement of anisotropic and arbitrary shaped grains of a directionally solidified superalloy on the J-integral is investigated by means of finite element analyses, where the models simulate the grain shape, its orientation, and the crack path of real material. The magnitudes of J(aniso), obtained by a detailed model, where most of grains are simulated, shows a stepwise change against the crack length a. This is mainly caused by the anisotropy of the grain at the crack tip. J(CV), obtained by a simplified model, where only the grains in the vicinity of the crack path are simulated, shows the same stepwise change as J(aniso). It elucidates that the anisotropy in the vicinity of the crack path is the dominant factor for the fluctuation of J(aniso). The magnitude of J(aniso) and J(CV), however, are different from each other in detail. A large inhomogeneous area such as a cluster of grains and a large grain has a far-field influence and is mainly responsible for the differences between J(aniso) and J(CV). (C) 2007 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