Upcoming Events

29

2023.06

Interaction between diffusion and stress

Understanding structural durability and safety of metal-ion batteries,such as lithium-ion battery and sodium-ion battery,is of practical importance for applications in electric vehicles and hybrid electric vehicles.
29

2023.06

Multiscale Modelling of Non-equilibrium Gas Transport

By simultaneously considering models at different scales,multiscale modelling offers an approach to accurately and efficiently describe problems for which the multiscale charac- ter is the dominating issue.In this talk,I will introduce my works on the multiscale modelling of non-equilibrium gas transport,which are based on a hybrid of macroscopic equations resolving flows in terms of macroscopic quantities and gas kinetic equations describing the variation of the molecular velocity distribution function,or quantum mechanical calculations from first principles. Following different coupling strategies,different methods have been developed,which are utilised to find the solutions to several multiscale problems.
27

2023.06

From the Fundamentals of Droplet Evaporation to Leidenfrost Engine

In this talk I will introduce some aspects related to droplet evaporation such as droplets evaporating on flexible substrates,complex fluids and biodroplets.The talk will also present some results on controlling droplets motion using surface roughness.Finally,the concept of a Leidenfrost engine will be presented as it stemmed from this fundamental research.
11

2022.07

Modelling fluid /body interactions

The interest here is in free motion of a body (particle) within fluid flow concerned with impacts and ice formation. Many interactions are involved. This mathematical-modelling research, motivated by observed icing of vehicles and by environmental and biomedical applications, aims to address several related problem areas. One area is the two-way fluid /body interaction occurring when a body is lifted off the ground by an oncoming fluid flow, with account taken of the small density and viscosity ratios present. Another area is on the impact of a body, passing through air, onto a solid surface. The effect of a water layer here is also of relevance.
　　
17

2022.05

The International Conference on Spectroscopic Ellipsometry (ICSE)

　　The International Conference on Spectroscopic Ellipsometry (ICSE) is the largest and best-known international conference on spectroscopic ellipsometry and related techniques. Since the first ICSE held in 1993, the conference has been the place where new advances and developments in ellipsometry are discussed with a variety of international participants from many different countries.
　　The 9th International Conference on Spectroscopic Ellipsometry will be held in Beijing, China from May 22nd to 28th, 2022. The 9th International Conference on Spectroscopic Ellipsometry continues the well-established ICSE series to provide an excellent forum for scientists and engineers working in instrumentation, science and applications of spectroscopic ellipsometry and related techniques.
　　ICSE-9 will bring together international participants from many countries and offer them the opportunity to present their latest results. Both young and experienced researchers are kindly invited to participate and interact for dissemination, discussion, and advancement of science and technology topics represented in ICSE-9.
　　Last year, we announced our plans to create a hybrid conference, and we were very much looking forward to having an onsite meeting in Beijing in addition to an online component. Due to the continuing impact of the COVID-19 pandemic on people throughout the world, we have decided to switch the congress to a fully online meeting.
　　
　　
15

2020.12

LHD Annual Conference 2020

　　Venue：Auditorium of Building No.1, Institute of Mechanics
　　Time: 9:00am, December 18, 2020
27

2020.10

The 2nd Conference in Intelligent Simulation and Control of Complex System Mechanics

　　
08

2020.04

Recent Advances on the Mechanics of Soft Materials（8:30AM April 9,2020; Auditorium of Building No.1）

　　
07

2018.06

Hsue-Shen Tsien Lecture of Engineering Sciences(9:00 AM June 7,2018; Auditorium of Building No.1)

　　Title: Recent Advances in Dynamic System Research
　　Reporter: Professor Weidong Zhu
　　Department of Mechanical Engineering
　　University of Maryland, Baltimore County
　　Abstract:
　　Some interesting results on vibration and stability of distributed structural systems, vibration-based damage detection, and infinitely variable transmission are reviewed. Vibration and stability of translating media with time-varying lengths and/or velocities are addressed. Two types of dynamic stability problems are considered: dynamic stability of translating media during extension and retraction, and parametric instabilities in distributed structural systems with periodically varying lengths and/or velocities. The incremental harmonic balance method is used and modified to handle periodic responses of high-dimensional nonlinear models and their stability and bifurcations, as well as quasi-periodic responses. A new spatial discretization and substructure method, which ensures that all matching conditions of distributed components are satisfied, and hence uniform convergence of solutions, are discussed. New formulations of flexible multibody dynamics are developed with application to elevator traveling cables. Nonlinear wave propagation in phononic structures and elastic wave cloaking are discussed. Two major challenges in model-based damage detection are addressed: accurate modeling of structures and development of a robustness algorithm for identifying locations and extent of damage. Non-model-based damage detection methods using scanning laser vibrometry are also presented.
　　
　　Brief Biography
　　Weidong Zhu is a Professor in the Department of Mechanical Engineering at the University of Maryland, Baltimore County, and the founder and director of its Dynamic Systems and Vibrations Laboratory and Laser Vibrometry Laboratory. He received his PhD degree in Mechanical Engineering from the University of California at Berkeley in 1994. He is a recipient of the 2004 National Science Foundation CAREER Award, the 2007 American Society for Nondestructive Testing Fellowship Award, the 2008 ChangJiang Scholar Chair Professorship in General Mechanics from the Ministry of Education of China, the 2009 Daily Record's Maryland Innovator of the Year Award. He has been an ASME Fellow since 2010, was an Associate Editor of the ASME Journal of Vibration and Acoustics from 2007-2014, and is a Subject Editor of the Journal of Sound and Vibration. His research spans the fields of dynamics, vibration, control, applied mechanics, structural health monitoring, wind energy, and metamaterials, and involves analytical development, numerical simulation, experimental validation, and industrial application. He has published over 120 SCI-indexed journal papers in these fields.
　　
28

2018.05

LNM Academic Report

　　Title：：Understanding Water Ice: Ten Weird Facts
　　Reporter：Prof. Chang Q Sun
　　Time：15:00pm, May 28,2018
　　Venue： Room 204 Building No.5, Institute of Mechanics
　　Abstract：As the source and central part of all life, the simple substance, water ice (H2O), bends the rules - it is too strange, too anomalous, and too challenging. Ideas in terms of continuum thermodynamics, molecular dynamics, or structural order configuration could hardly explain completely the weird facts that one can observe. From the perspective of hydrogen bond (O:H—O) cooperativity and polarizability, we have reconciled the mysteries of water ice subjecting to mechanical compression, thermal stimulation, molecular undercoordination, and electromagnetic excitation. Here we share understanding of ten typical facts: ice floating, ice regelation, ice friction, “instant” icing, nanobubble stability, water's tough skin, salt ice melting, floating water bridge, frog maglev, and the Mpemba paradox - warmer water cools faster. As the basic structural and energy-exchange unit, the O:H—O bond cooperative relaxation in length and energy rules the weirdness of water ice.

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