Convenient prediction method of the stress intensity factor of FGM plate based on the ratio of stresses at crack tip

被引：0
|
作者：
Li R. [1 ]
Yang M. [1 ]
Liang B. [1 ]
机构：
[1] School of Civil Engineering, Henan University of Science and Technology, Luoyang
来源：
Chuan Bo Li Xue/Journal of Ship Mechanics | 2019年 / 23卷 / 05期
关键词：
Convenient prediction method; FGM plate; Finite element method; Stress intensity factor; The ratio of stresses at crack tip;
D O I：
10.3969/j.issn.1007-7294.2019.05.008
中图分类号：
学科分类号：
摘要：
In order to make up for the lack of prediction method for the strength of functionally graded material (FGM) structure, a convenient prediction method of stress intensity factor is proposed in terms of the ratio of stresses at crack tip. Based on the finite element method, the solution for the mechanics problem of the FGM plate can be simplified to the calculation problem of the ratio of stresses at crack tip. Then, the stress intensity factor of FGM plate can be obtained conveniently by using the ratio of the stresses of FGM plate and homogeneous plate and the empirical formula of stress intensity factor of homogeneous plate. This method avoids abundant matrix and integral operations, the predicted values of stress intensity factor of FGM plate can be obtained accurately and quickly by using only 2D model. The calculation results indicate that the predicted results coincide with the reference results. The simplicity and usefulness of the present method in engineering application is proved by using examples. © 2019, Editorial Board of Journal of Ship Mechanics. All right reserved.
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页码：566 / 574
页数：8
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