Stress intensity factor calculation for semi-elliptical cracks on functionally graded material coated cylinders

被引：0

作者：

Farahpour, Peyman ^{[1
]}

Babaghasabha, Vahid ^{[2
]}

Khadem, Mahdi ^{[3
]}

机构：

[1] Islamic Azad Univ, Qazvin Branch, Fac Ind & Mech Engn, Qazvin, Iran

[2] Islamic Azad Univ, Qazvin Branch, Young Researchers & Elite Club, Qazvin, Iran

[3] Yonsei Univ, Dept Mech Engn, Seoul 120749, South Korea

来源：

STRUCTURAL ENGINEERING AND MECHANICS | 2015年 / 55卷 / 06期

关键词：

fracture; functionally gradient materials (FGMs); cylinder; stress intensity factor (SIF); semi-elliptical crack; finite element method (FEM); INHOMOGENEOUS ORTHOTROPIC MEDIUM; FINITE-ELEMENT-METHOD; FRACTURE-ANALYSIS; NONHOMOGENEOUS MATERIALS; SURFACE CRACKS; GRADIENT; COMPUTATION; INTERFACE; FIELDS;

D O I：

10.12989/sem.2015.55.6.1087

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In this paper, the effect of functionally graded material (FGM) coatings on the fracture behavior of semi-elliptical cracks in cylinders is assessed. The objective is to calculate the stress intensity factor (SIF) of a longitudinal semi-elliptical crack on the wall of an aluminum cylinder with FGM coating. A three-dimensional finite element method (FEM) is used for constructing the mechanical models and analyzing the SIFs of cracks. The effect of many geometrical parameters such as relative depth, crack aspect ratio, FG coating thickness to liner thickness as well as the mechanical properties of the FG coating on the SIF of the cracks is discussed. For a special case, the validity of the FE model is examined. The results indicated that there is a particular crack aspect ratio in which the maximum value of SIFs changes from the deepest point to the surface point of the crack. Moreover, it was found that the SIFs decrease by increasing the thickness ratio of the cylinder. But, the cylinder length has no effect on the crack SIFs.

引用

页码：1087 / 1097

页数：11

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