Comprehensive investigation of stress intensity factors in rotating disks containing three-dimensional semi-elliptical cracks  

作　　者：M.FAKOOR S.M.N.GHOREISHI 

机构地区：[1]Faculty of New Sciences and Technologies, University of Tehran, Tehran 14395-1561, Iran

出　　处：《Applied Mathematics and Mechanics(English Edition)》2017年第11期1565-1578,共14页应用数学和力学（英文版）

摘　　要：Initiation and propagation of cracks in rotating disks may cause catastrophic failures. Therefore, determination of fracture parameters under different working con- ditions is an essential issue. In this paper, a comprehensive study of stress intensity factors （SIFs） in rotating disks containing three-dimensional （3D） semi-elliptical cracks subjected to different working conditions is carried out. The effects of mechanical prop- erties, rotational velocity, and orientation of cracks on SIFs in rotating disks under cen- trifugal loading are investigated. Also, the effects of using composite patches to reduce SIFs in rotating disks are studied. The effects of patching design variables such as mechanical properties, thickness, and ply angle are investigated separately. The modeling and analytical procedure are verified in comparison with previously reported results in the literature.Initiation and propagation of cracks in rotating disks may cause catastrophic failures. Therefore, determination of fracture parameters under different working con- ditions is an essential issue. In this paper, a comprehensive study of stress intensity factors （SIFs） in rotating disks containing three-dimensional （3D） semi-elliptical cracks subjected to different working conditions is carried out. The effects of mechanical prop- erties, rotational velocity, and orientation of cracks on SIFs in rotating disks under cen- trifugal loading are investigated. Also, the effects of using composite patches to reduce SIFs in rotating disks are studied. The effects of patching design variables such as mechanical properties, thickness, and ply angle are investigated separately. The modeling and analytical procedure are verified in comparison with previously reported results in the literature.

关 键 词：stress intensity factor （SIF） semi-elliptical crack rotating disk finite ele-ment analysis （FEA） 

分 类 号：O346.1[理学—固体力学] TB126[理学—力学]