Solutions of Stress Intensity Factors of Multiple Internal Axial Cracks in Hollow Cylinders

Colloquium of Advanced Mechanics 2016

Ismail, Al Emran^1

Faculty of Mechanical and Manufacturing Engineering, Unviersiti Tun Hussein Onn Malaysia, Johor

86400, Malaysia^1

关键词: Ansys finite elements;    Axial cracks;    Crack fronts;    Crack spacing;    Hollow cylinders;    Interaction domain;    Interaction effect;    Shallow cracks;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/165/1/012001/pdf
DOI  :  10.1088/1757-899X/165/1/012001

来源: IOP

【 摘 要 】

This paper solved numerically the stress intensity factors of multiple internal axial cracks in hollow cylinders under internal pressure. Semi-elliptical shaped cracks are modelled using ANSYS finite element program and the stress intensity factors are calculated using interaction domain integral which is based on the J-integral. There are two important parameters are considered such as crack aspect ratio, a/t is 0.2, 0.4 and 0.75 and crack spacing distance, d/c is 0.4, 0.7 and 1.1. For multiple internal axial cracks under internal pressure, stress intensity factors along the crack front decreased when crack aspect ratio, a/t is increased. It is also revealed that the role of crack spacing on the stress intensity factor is insignificant especially for the shallow cracks (a/t