讲座时间：2026年11月14日 下午14:00

讲座地点：X30280

讲座题目：Multi-Fidelity Computational Models for Static, Impact and Fatigue Damage in Composite Structures

主 讲 人：T.E. Tay

个人简介：

T.E. (Tong-Earn) Tay is full Professor at the Department of Mechanical Engineering, National University of Singapore (NUS). His current research interests are in progressive damage, failure, fracture, delamination, impact, and adaptive multi-fidelity and multi-scale computational analysis of fiber-reinforced composite materials and structures. His research has led to 204 journal publications (Google H-index 58) and 300 conference and seminar presentations. Professor Tay has graduated 19 PhD students, 24 Masters students and mentored 27 postdoctoral researchers. He has also been the principal investigator of research grants from Agency for Science, Technology & Research (A*STAR), Defence Science Organisation (DSO), Economic Development Board (EDB), Ministry of Education, Marine & Port Authority (MPA), US Air Force Office of Scientific Research (AFOSR), Republic of Singapore Air Force and numerous direct industry funding (Maruhachi, Airbus, Rolls-Royce, Vestas, Haliburton, DSM Protective Materials, etc.). He was formerly Head of Department of Dept of Mechanical Engineering, NUS, from 2011 to 2015, and Vice-Dean for Research for Faculty of Engineering, NUS, from 2009 to 2011. He is a recipient of JEC Life Achievement Award, a registered Professional Engineer (PE), Chartered Engineer (CEng), Founding Fellow of the Singapore Academy of Engineering (FSAE) and Council Member of the Asian-Australasian Association for Composite Materials.

讲座内容：

Multi-fidelity modeling and prediction of progressive damage and failure of notched fiber-reinforced laminates will be discussed. At the sub-laminate continuum scale, the primary mechanisms of progressive damage are matrix and fiber-matrix micro-cracks, delamination and fiber breakage with strong inter-mechanistic interactions. Early developments focused on material stiffness degradation, later also known as smeared crack models, because they are intuitive and easy to implement. Unfortunately, when applied within the finite element framework, the results are found to be mesh dependent. Later developments of cohesive zone and discrete crack models enabled the integration of these damage mechanisms into high-fidelity models with minimal sacrifice to the physics of interactions, although they generally incur high computational costs. Recent adaptive combinations of high and lower fidelity methods are shown to improve efficiency. This presentation outlines key developments and examples in the author’s work, from smeared crack modeling, discrete crack modeling, fracture and strength characterization, explicit versus implicit finite element implementations, adaptive multi-fidelity modeling, and mechanics-based modeling of non-linear contributions due to the evolution of cracks and material plasticity in thermoplastic composites. Recently, discrete crack models have been successfully applied to metal-composite riveted joints and fatigue analysis of quasi-isotropic (QI) and double-double (DD) laminates with experimental validations, further shedding light on our understanding of competing failure mechanisms.