题目: On the Development & Application of the Polygonal- and Quadtree-Based Scaled Boundary Finite Element Method for Fracture Applications in Engineering
报告人：Dr. EanTat Ooi
Dr. Ooi is a senior lecturer in engineering the School of Science, Engineering and Information Technology, Federation University Australia. He obtained his PhD from Nanyang Technological University, Singapore in 2006. He is an active researcher in the field of computational mechanics and has held research positions in the National University of Singapore, the University of Liverpool and the University of New South Wales. Dr. Ooi’s research focuses on the development of the Scaled Boundary Finite Element Method (SBFEM); a semi-analytical numerical technique for computational modelling. He is one of the pioneers in establishing a framework for the polygonal based SBFEM for material nonlinear analyses and fracture mechanics. He is interested in further developing this technique for other applications in engineering.
The scaled boundary finite element method has a longstanding history of robust applications in fracture mechanics. The efficiency of the method lies in its ability to accurately model the asymptotic field in the vicinity of any kind of stress concentrators. This accuracy is achieved from an analytical solution of the equilibrium equation formulated locally in the computational domain. This presentation discusses the development of the scaled boundary finite element method in fracture mechanics applications from its inception to its development with polygonal and quadtree meshes as it is widely used today. The flexibility of the scaled boundary finite element method enables it to be formulated on polygons with an arbitrary number of sides. This, later, facilitates direct implementation with quadtree meshes and leads to an efficient and robust approach to model crack propagation when combined with polygonal meshes. Simple yet robust remeshing algorithms can be developed taking advantage of the flexibility of the scaled boundary finite element method. Applications of the scaled boundary finite element method are presented including crack propagation in heterogeneous materials, elasto-dynamic analyses, nonlinear cohesive analyses, image based mesoscale analysis and particle breakage modelling are discussed.
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