2023 Speakers

Speaker I

Prof. Henry Hu, University of Windsor, Canada

Dr. Hongfa (Henry) Hu is a tenured full Professor at Department of Mechanical, Automotive & Materials Engineering, University of Windsor. He was a senior research engineer at Ryobi Die Casting (USA), and a Chief Metallurgist at Meridian Technologies, and a Research Scientist at Institute of Magnesium Technology. He received degrees from University of Toronto (Ph.D., 1996), University of Windsor (M.A.Sc., 1991), and Shanghai University of Technology (B.A.Sc., 1985). He was a NSERC Industrial Research Fellow (1995-1997). His publications (over 150 papers) are in the area of magnesium alloys, composites, metal casting, computer modelling, and physical metallurgy. He was a Key Reader of the Board of Review of Metallurgical and Materials Transactions, a Committee Member of the Grant Evaluation Group for Natural Sciences and Engineering Research Council of Canada, National Science Foundation (USA) and Canadian Metallurgical Quarterly. He has served as a member or chairman of various committees for CIM-METSOC, AFS, and USCAR. The applicant’s current research is on materials processing and evaluation of light alloys and composites. His recent fundamental research is focussed on transport phenomena and mechanisms of solidification, phase transformation and dissolution kinetics. His applied research has included development of magnesium automotive applications, cost-effective casting processes for novel composites, and control systems for casting processes. His work on light alloys and composites has attracted the attention of several automotive companies.

Speaker II

Prof. Zhongwei Guan is Executive Director of Advanced Materials Research Centre of Technology Innovation Institute, Abu Dhabi

Professor Zhongwei Guan is Executive Director of Advanced Materials Research Centre of Technology Innovation Institute in Abu Dhabi. He received his first degree on Solid Mechanics in Sichuan University China in 1982 and was awarded PhD on Structural Behaviour of Polymeric Pipelining in University of Bradford UK in 1993. He was Reader in Lightweight Composite Materials and Structures at the University of Liverpool. He has published more than 170 SCI papers in refereed leading international journals on lightweight composite structures subjected to extreme loading conditions such as projectile impact and blast, covering fibre metal laminates, PVC foam-based sandwiches and SLM lattice structures, corrugated sandwiches, timber structures, high temperature TP prepreg, etc., with a h-index of 41 in Google Scholar and citation more than 5400. He was Chairman of the 5th International Conference on Computational Methods held in Cambridge in 2014. He is a member of editorial board of International Journal of Impact Engineering, Applied Composite Materials and Advanced Materials Letter. He also serves as a scientific committee member of more than 20 international conferences and has given more than 20 keynotes, thematic and plenary speeches.

Title: Impact and Blast Response of Fibre Metal Laminates Subjected to High Velocity Impact and Blast Loading

A fibre-metal laminate (FML) is a type of sandwich structure consisting of alternating layers of metal and fibre-reinforced composite. The particular interest in using these hybrid materials is due to their attractive properties, such as high strength-to-weight ratio, ability to tailor material properties and design, and good fatigue, fire, impact and corrosion resistance. FMLs have been attracting the interest of a number of aircraft manufacturers. For example, GLARE is being used in the manufacture of the upper fuselage of the A380, an aircraft that is capable of carrying up to 700 passengers, also a cargo door for C-17 transport aircraft, Airbus A400 frames. However, with such composite materials being more widely used, an on-going concern is the effect of foreign object impacts and potential blast on their mechanical properties and failure modes. An example of impact is that of an aircraft underbelly or wing impacted at high velocity during take-off and landing by stones (include hailstones) and other small debris from the runway. In addition, blast can also occur in aircraft due to accident of engine blast or terrorist attack. In this presentation, manufacturing of FMLs, their material characteristics and applications are firstly introduced. Then, 3D nonlinear finite element models are presented to show the simulation of projectile impact and blast response of FMLs, including oblique impact. Here, the effort was concentrated on modelling woven glass fibre reinforced composites, also bonding between metal and composite layers, as simulation of aluminium alloys is a relatively simple task. In the work presented here, a damage evolution law is incorporated into the composite constitutive behaviour to obtain the impact and blast response of FML panels. The modelling outputs for projectile impact and blast loadings are validated against the corresponding experimental results, with good correlation in terms of load-displacement relationship, deformation and failure modes. Figures 1 and 2 below show the simulated impact and blast response of FMLs with the related experimental failure modes. The validated computer models can be used to assist design and optimisation of FML components suitable for different applications corresponding to dynamic loadings.

Speaker III

Prof. Vladimir Khovaylo, National University of Science and Technology, Russia

Biography: Prof. Vladimir Khovaylo received M.S. degree from M.V. Lomonosov Moscow State University, Russia, in 1997 and Ph.D. degree from Tohoku University, Japan, in 2002. In 2010 he defended habilitation thesis (Dr. Ing. habil.) at M.V. Lomonosov Moscow State University. He was a JSPS Fellow at National Institute of Advanced Industrial Science and Technology, Japan (2002-2004) and a senior researcher at Institute of Radioengineering and Electronics of Russian Academy of Sciences (2004-2009) before joining National University of Science and Technology “MISiS”, Russia, where he is currently a professor of materials science and a deputy director of the Centre for Energy Efficiency Research and Education. He was visiting professor at University of Duisburg-Essen, Germany (2006), Oviedo University, Spain (2007), invited professor at Tohoku Gakuin University, Japan (2008), and JSPS distinguished researcher (2010) and visiting professor (December 2017 – February 2018) at Tohoku University, Japan. In 2016 he was recognized as the Best Research Professor of the National University of Science and Technology “MISiS”. From 2017, Prof. Khovaylo is corresponding member of the International Thermoelectric Academy. His research interests include ferromagnetic shape memory alloys, Heusler compounds and nanostructured thermoelectric materials.

Title: Compensated Ferrimagnetism in Heusler Alloys

The intense experimental and theoretical search for materials with high dynamic characteristics (speed of domain walls, frequencies of natural spin vibrations) has been motivated by the development of new magnetic systems for recording and processing information with increased recording density and speed. In this context, antiferromagnets could be of considerable interest because their spin dynamics are expected to be much faster than that of ferromagnets. However, ordinary antiferromagnets are not suitable materials for this aim because the equivalency of two magnetic sublattices wipes out the effects which are important for spintronic devices. Fortunately, the problems inherent of antiferromagnets can be solved by using ferrimagnets in which, for some values of external parameters (e.g., temperature), the magnetization of the sublattices can cancel each other, which is called the phenomenon of magnetization compensation or spin compensation. In the vicinity of the spin compensation point, the dynamics is similar to antiferromagnetic and the domain walls velocity and the frequency of spin vibrations increase [1].
From an experimental point of view, the phenomenon of spin compensation can be observed in a wide class of Heusler alloys. Design of X2YZ Heusler-based compensated ferrimagnets is based on the combination of the Slater-Pauling rule, which states that the magnetic moment is determined by the valence electron numbers and the Kübler rule, which ascribes a high local magnetic moment to the Mn atoms at Y position [2]. Alongside with the X2YZ Heusler alloys, this approach has been found to be applicable for tetragonal Mn3Z (Z = Ga, Al, Ge), which can be considered as Heusler-like Mn2MnZ systems [3]. Among the X2YZ Heusler alloys, the most intensively studied alloys were those with X = Mn. Magnetism of these alloy systems can be easily tuned by partial substitution of Mn atoms with a non-magnetic element thus adjusting the difference in magnetization of the two magnetic sublattices to zero value. Examples of successful realization of the compensated ferrimagnetism in Heusler alloys shall be outlined in the presentation. Impact of the structural ordering on the magnetization compensation shall be discussed for the case of ordinary and inverse Heusler structure.