Title of article :
Dual Boundary Element Method in Modeling of Fatigue Crack Propagation
Author/Authors :
Mohd Ihsan, Ahmad Kamal Ariffin Universiti Kebangsaan Malaysia - Faculty of Engineering Built Environment - Computational Mechanics Group, Malaysia , Nik Mohamed, Nik Abdullah Universiti Kebangsaan Malaysia - Faculty of Engineering Built Environment - Computational Mechanics Group, Malaysia , Mohd Romlay, Fadhlur Rahman Kolej Universiti Kejuruteraan Teknologi Malaysia (KUKTEM) - Faculty of Mechanical Engineering, Malaysia
Abstract :
This paper deals with the modelling of fatigue crack propagation on a centre member bar using a dual boundary element method.The effects of life cycle to the multiple site fatigue crack propagation were studied. Analysis of stress intensity factor was performed by the deterministic approach using a dual boundary element method.The dual boundary element method was used to simplify the crack model through the numerical approach.The complex problems have been solved using the information from a boundary condition only. Next, the initial crack and life cycle of the structure have been predicted using probabilistic method which is Monte Carlo.The crack size and fatigue life were computed until failure of the structure.The failure analysis was performed by a linear elastic fracture mechanics.The scenarios of the fatigue crack propagation were given by an integration of both dual boundary element and Monte Carlo method.Therefore, fatigue life of multiple site crack structure can be predicted.
Keywords :
Crack propagation , fatigue , Monte Carlo , boundary element method
