Stress intensity factors of double edge cracks in large groove plates under mode I tension

4th AEROTECH- Innovation in Aerospace Engineering and Technology

航空航天工程

Ismail, A.E.^1 ; Azlan, M.A.^1 ; Tobi, M.L.M.^1 ; Ahmad, M.H.^2

Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, Johor, Batu Pahat, Malaysia^1

Faculty of Civil and Environmental Engineering, Universiti Tun Hussein Onn Malaysia, Johor, Batu Pahat, Malaysia^2

关键词: Ansys finite elements;    Circular notches;    Crack depths;    Crack geometries;    Edge cracks;    Lower stress;    Plain strain;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/152/1/012049/pdf
DOI  :  10.1088/1757-899X/152/1/012049

学科分类：航空航天科学

来源: IOP

【 摘 要 】

The solutions of stress intensity factors (SIFs) of double edge cracks in large groove plates are investigated. The plate is assumed to fulfil the plain strain condition and it is axially stressed. According to the literature, the SIFs of the cracks in circular notches are available. However, the roles of cracks in large groove are difficult to obtain. Therefore, different grooves and crack geometries are modelled numerically using the ANSYS finite element software. The present model is first validated using an existing model of double edge cracks without notches and it is found that both models are in close agreement. The large grooves are then introduced and the cracks are positioned in the mid-point. It is found numerically that the SIFs are strongly affected by the relative crack depth and the groove geometries. It is also found that the large groove is capable of reducing the SIFs in comparison with the circular notched due to lower stress concentration factors.