Professor C.W. Lim Department of Architecture and Civil Engineering City University of Hong Kong, China
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Keynote Lecture: Theory, Numerical Analysis and Experiments of Acoustic and Seismic Metamaterials and Metastructures Abstract: The recent surge in the number of studies on seismic metamaterials is testimony to the fact that the concept of photonic crystals, phononic crystals and acoustic metamaterials is no longer limited to basic theories and dynamic characteristics. Apart from the peculiar observation including negative stiffness, negative mass density negative refraction properties, etc., auxetic metamaterials that govern negative Poisson’s ratio, nonreciprocal wave phenomena, origami/kirigami effects also find potential applications in geophysics and earthquake engineering [4-5]. Except man-made synthetic resonators/metastructures, recently forest trees at geophysical scale are reported as naturally available seismic metamaterials with capability to mitigate ground born ambient vibrations and incoming seismic waves at subwavelength frequency region. The work to be presented here elaborates a class of materials and structures ranging from engineered phononic crystals and acoustic metamaterials in Fig (a,b) to natural seismic metamaterials in Fig. (c,d) that show exotic yet with outstanding application potentials. Besides discussing the peculiar yet wonderful wave propagation characteristics of periodic structures for wave active control, topological protected interface modes, etc., the exciting wave dispersion response that found applications for manipulation Rayleigh wave and possible forestation as a means for geographical regional isolation against ground surface wave motion will also be presented. Biography: Ir Professor Lim received a BEng from University of Technology of Malaysia, MEng and PhD from National University of Singapore and Nanyang Technological University, respectively. Prior to joining City University of Hong Kong (CityU), he was a post-doctoral research fellow at The University of Queensland and The University of Hong Kong. Professor Lim is also a visiting professor at various universities including the University of Western Sydney, Dalian University of Technology, Huazhong University of Science and Technology, etc. Professor Lim receives global recognition for original research in applied and computational mechanics. He was awarded the J.N. Reddy Medal 2020 for “significant and original contributions to vibration of plates and shells, smart piezoelectric structures, nanomechanics, and symplectic elasticity.” He published over 380 articles, H-index 63, over 15,100 citations. He has co-authored one very well-selling title in Engineering Mechanics titled “Symplectic Elasticity”, as recorded in April 2010 by the publisher, World Scientific. As the first and corresponding author in another work, he established one ground-breaking theory and the paper has accumulated over 1,220 citations since first published in 2015. It is also a highly cited paper in JMPS as well as the most cited paper since 2004 in the journal. His other work was granted the IJSS 2004-2008 most cited article award. He also published a research paper in Nature Communications. He was awarded Top Referees in 2009, Proc. A, The Royal Society. Professor Lim holds fellowships of ASME, ASCE, EMI, and HKIE. He was awarded the Tan Chin Tuan Exchange Fellowship by Nanyang Technological University in 2016. Recently he was elected by secret votes to deliver a Plenary Lecture at World Congress on Computational Mechanics 2022 , the largest biennial meet for computational scientists. WCCM 2020 recorded over 400 mini-symposia and over 5,000 papers accepted . He has delivered over 60 plenary/keynote speeches worldwide. In addition, he also presented a keynote speech at PHM-2021 which is a reputable IEEE international conference. In another scientific occasion, Professor Lim was one of the distinguished speakers at a forum on 28 May 2022 organized by Chinese Science Bulletin that were broadcasted online on five different virtual platforms. He was the opening speaker and it was marvelous to note that the scientific forum accumulatively attracted a remarkable over 30,000 strong audience online. He holds the Chair of Selection Committee (2017-present) for J.S. Rao Medal in Vibration Engineering, GC member of IACM and APACM since 2019, Selection Committee Member of APACM awards, Vice Chair/Chair (2018-2022) for ASCE/EMI Stability Committee, Vice Chair (2021-2023) and Chair (2023-Present) for ASME Int. HK Section, and Technical Committee Member for IFToMM since 2011. He received multiple research grants totaling millions of dollars, one FE software and four patents. He serves on over 20 journal editorial boards, notably JoMMS (co-Editor-in-Chief), JVET (Managing Editor), AMM (International Subject Editor), JSV (Subject Editor), RSOS (Engineering Subject Editor), etc. |
Prof. Tong-Earn Tay National University of Singapore, Singapore
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Keynote Lecture: Tailoring Bio-Inspired Helicoidal Composites for Impact Performance Abstract: The peacock mantis shrimp is a small stomatopod equipped with a deadly club, with which it attacks its prey with remarkable force and speed. The structure of its exoskeleton consists of layers of aligned chitin fibers arranged in a laminated helicoidal layup, with each adjacent layer progressively rotated. In recent years, bio-inspired helicoidal fiber-reinforced polymer (FRP) composites have been studied intensively. When properly designed, they can outperform conventional laminates such as cross-ply and quasi-isotropic laminates in out-of-plane loading, low speed impact and high-speed impact. Competing failure mechanisms between fiber damage, delamination and matrix splits may be exploited to optimize their impact and ballistic performance. This presentation will overview some latest findings on the failure mechanisms of helicoidal laminates, role of laminate architecture and inter-ply angles, the use of different fibers, and the role of matrix toughness. Understanding the underlying failure mechanisms enables effective healing of damaged helicoidal thermoplastic composites and thermoset composites with interleaved thermoplastics. Recent results of directionally 3D-printed thermoplastic helicoidal plates show similar stair-case failure patterns and mechanisms. The research shows that helicoidal laminates hold promise in design of more impact-resistant composite structures and components. Potential areas for future research directions will also be discussed. Biography: T.E. (Tong-Earn) Tay is Professor at the Department of Mechanical Engineering, National University of Singapore (NUS). He has a PhD in Solid Mechanics from the University of Melbourne, Australia. 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. 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. He is an associate editor for the Journal of Reinforced Plastics & Composites, and editorial board member of the Journal of Composite Materials, International Journal of Damage Mechanics, Applied Composite Materials, Multiscale and Multidisciplinary Modeling Experiment and Design, and Journal of Multiscale Modeling. He served on a number of scientific advisory committees of international conferences on composites and presented several plenary, keynote and invited talks. He is the author or co-author of 180 international journal papers, 4 invited book chapters, 3 patents and 254 conference and seminar presentations. He obtained research funding from various agencies and industry, including Rolls-Royce, Airbus Germany, Haliburton Far East, Vestas, DSM Protective Materials, Maruhachi Corp., US Air Force Office of Scientific Research, A-Star Science & Engineering Research Council, Defence Science Organization, Marine Port Authority and Ministry of Education. He has reviewed proposals for The Netherlands Organisation for Scientific Research (NWO), the Dutch Polymer Institute (DPI), the Australian Research Council’s Centres of Excellence, the Research Grants Council of Hong Kong and the South African National Research Foundation. 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. |
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Prof. Ruxu Du Fellow, Society of Manufacturing Engineers (SME) Fellow, America Society of Mechanical Engineers (ASME) Fellow, Hong Kong Institute of Engineers (HKIE) South China University of Technology, China |
Prof. Bob Tait University of Cape Town, South Africa
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Prof. Kikuo Kishimoto Professor Emeritus, Tokyo Institute of Technology Fellow, National Institute for Education Policy Research Honorary Chair Professor, National Taiwan University of Science and Technology Tokyo Institute of Technology, Japan |
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Prof. Roderick Smith Imperial College, UK Research Professor Department of Mechanical Engineering Chairman Future Rail Research Centre Imperial College London Chair of the Future Railway Research Centre Vice President of the Institution of Mechanical Engineers Honorary Visiting Professor at Central Queensland University, Australia & of the Academy of Railway Science of China and York and City universities in the UK |
Prof. Jagannathan Sankar North Carolina A&T State University, USA Director-NSF/ERC for Revolutionizing Metallic Biomaterials White House Millennium Researcher Director -Center for Advanced Materials and Smart Structures (CAMSS)
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Prof. Zhengwei You Chair of the Department of Composite Materials College of Material Science & Engineering, Donghua University
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Prof. Minghui Yang Ningbo Institute of Industrial Technology (CNITECH) Chinese Academy of Sciences Solid State Functional Materials Laboratory |
Prof. Yu-Lung Lo National Cheng Kung University, Taiwan, ROC Director, Instrument Development Center Director, NSC Instrument Center at NCKU
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Dr. Shutao Chen Technical Development Manager, China, Solvay Specialty Polymers
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Prof. Alan Kin-Tak Lau Swinburne University of Technology, Australia |
Prof. Jun Ding National University of Singapore, Singapore |
Prof. Shiv G. Kapoor University of Illinois, Urbana-Champaign, USA |
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Prof. Yong Tang Shanghai institute of Organic Chemistry Shanghai, China |
Prof. Ramesh Singh University of Malaya, Malaysia |
Prof. Xuexi Zhang Harbin Institute of Technology, China |
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Prof. Lihui Lang Beihang University, China |
Prof. Baohua Jia Swinburne University of Technology, Australia |
Prof. Bin Niu Dalian University of Technology, China |
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Assoc.Prof. Weimin Huang Nanyang Technological University, Singapore |
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