Extended finite element fracture analysis of a cracked isotropic shell repaired by composite patch

详细信息    查看全文

• 作者：H. Zarrinzadeh ; M. Z. Kabir and A. Deylami
• 刊名：Fatigue & Fracture of Engineering Materials & Structures
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：39
• 期：11
• 页码：1352-1365
• 全文大小：755K
• ISSN：1460-2695

文摘

An extended finite element method (XFEM) is developed to study fracture parameters of cracked metal plates and tubes that are repaired on top of the crack with a composite patch. A MATLAB® stand-alone code is prepared to model such structures with eight-noded doubly curved shell elements in the XFEM framework. Crack trajectory studies are performed for a diagonally cracked panel under fatigue loading. Verification studies are investigated on different shell type structures such as a cracked spherical shell and cracked cylindrical pipe with different crack orientations. The effects of using patch repairs with different fibre orientations on the reduction of stress intensity factors (SIFs) is also studied which can be useful for design purposes. XFEM is selected as any crack geometry can be embedded in the finite element mesh configuration with no need to coincide the crack geometry with meshed elements and so re-meshing with fine mesh generation is not needed in the current method.