报告主题：Multiphysics Fracture Modelling Using the Scaled Boundary Finite Element Method and Phase Field Models
报告人：Ooi Ean Tat 教授（澳大利亚联邦大学）
报告时间：2026年10月26日（周一）10：00
报告地点：91麻豆 （江宁校区）致高楼A203
主办单位：91麻豆 动力学与控制研究所
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报告简介：
Fracture in engineering materials is often influenced by several physical processes. These include fluid pressure, temperature and species transport. Their interaction with the mechanical field influences crack initiation and propagation. Phase field models provide a convenient approach to model these problems without explicitly tracking crack paths.
A fine spatial discretisation is usually required to resolve the diffused crack in phase field models. The scaled boundary finite element method (SBFEM) can be formulated directly on polygons with an arbitrary number of sides and is well suited to adaptive quadtree meshes. Local refinement can be introduced around the evolving fracture zone without additional treatment of hanging nodes. Computational efficiency can also be gained by exploiting the finite number of recurring cell patterns in a quadtree mesh and avoiding repeated calculations for cells with the same configuration.
Applications to poroelastic fracture, thermo-mechanical fracture, hydrogen-assisted cracking and thermo-poroelastic fracture are discussed. A recent extension considers thermo-mechanical quasi-brittle fracture using a phase-field cohesive zone model. An isoparametric implementation of the SBFEM is adopted in this formulation, where the shape functions are constructed on a set of parent elements and reused in the analysis. Adaptive refinement is employed to resolve the fracture and thermal fields efficiently.
报告人简介：
Dr. Ooi Ean Tat is a Professor of Mechanical Engineering and Head of Engineering at Federation University Australia. His research is in computational mechanics, focusing on the scaled boundary finite element method and the development of numerical methods for engineering analysis. His work includes polygonal and polyhedral elements, fracture and damage modelling, nonlinear analysis and coupled problems. He has received research funding from the Australian Research Council through Discovery and Linkage projects and has worked with industry on problems in infrastructure and resources engineering. He serves on the Editorial Board of Finite Elements in Analysis and Design and is active in the international computational mechanics community.
