Combined mode I stress intensity factors of slanted cracks

International Research and Innovation Summit 2017

Ismail, A.E.^1 ; Abdul Rahman, M.Q.^2 ; Mohd Ghazali, M.Z.^3 ; Zulafif Rahim, M.^1 ; Rasidi Ibrahim, M.^1 ; Hassan, Mohd Fahrul^1 ; Muhd Nor, Nik Hisyamudin^1 ; Ariffin, A.M.T.^1 ; Yunos, Muhamad Zaini^1

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

86400, Malaysia^1

Centre for Diploma Studies, Unviersiti Tun Hussein Onn Malaysia, Johor, Batu Pahat

86400, Malaysia^2

Malaysia Marine and Heavy Engineering SDN. Bhd., Pasir Gudang, Johor

81700, Malaysia^3

关键词: Ansys finite elements;    Bending loading;    Crack length;    Displacement extrapolation method;    Mode I stress intensity factor;    Normal cracks;    Plain strain;    Tension force;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/226/1/012011/pdf
DOI  :  10.1088/1757-899X/226/1/012011

来源: IOP

【 摘 要 】

The solutions of stress intensity factors (SIFs) for slanted cracks in plain strain plate are hard to find in open literature. There are some previous solutions of SIFs available, however the studies are not completed except for the case of plain stress. The slanted cracks are modelled numerically using ANSYS finite element program. There are ten slanted angles and seven relative crack depths are used and the plate contains cracks which is assumed to fulfil the plain strain condition. The plate is then stressed under tension and bending loading and the SIFs are determined according to the displacement extrapolation method. Based on the numerical analysis, both slanted angles and relative crack length, a/L played an important role in determining the modes I and II SIFs. As expected the SIFs increased when a/L is increased. Under tension force, the introduction of slanted angles increased the SIFs. Further increment of angles reduced the SIFs however they are still higher than the SIFs obtained using normal cracks. Under bending moment, the present of slanted angles are significantly reduced the SIFs compared with the normal cracks. Under similar loading, mode II SIFs increased as function of a/L and slanted angles where increasing such parameters increasing the mode II SIFs.