detailed program for parallel sessions - The 4th International ...

More documents

Recommendations

Info

Professor XiQiao Feng Department of Engineering Mechanics, Tsinghua University, P.R. China Title: Surface wrinkling and morphological evolution of soft materials The ICCM2012, Gold Coast, Australia Abstract: Surface instability and morphological evolution of such soft materials as gels and biological tissues is a major concern in a wide diversity of fields, e.g., soft lithography, metrology, flexible electronics, and biomedical engineering, and therefore have received much attention. In this talk, surface instability of soft materials and biological tissues are discussed within the framework of continuum mechanics. Firstly, a generic method is presented for analyzing the surface stability of a thin film resting on a substrate with arbitrary geometry. Secondly, the growth and buckling of mucosas that commonly line organs and cavities throughout the animal body are analyzed theoretically, numerically and experimentally. Finally, the surface wrinkling of soft core-shell matters induced by swelling or shrinking is investigated. The results demonstrate that the evolution of the sphere may be characterized by a process of smooth surface, buckyball-like wrinkling pattern, and then undergoing a wrinkling-to-fold transition into labyrinth-like folded patterns, in agreement with our experimental observations. Bio data: Professor Xi-Qiao Feng is a Chang Jiang Chair Professor and the head of Department of Engineering Mechanics, Tsinghua University. He earned a Ph.D. degree in Solid Mechanics in 1995 at Tsinghua University. From 1997 to 1999, he worked as a Humboldt research fellow in Technical University of Darmstadt and Delft University of Technology. He rejoined Tsinghua University as an associate professor in 1999 and was promoted to a professor in 2001. Selected Feng’s honors include Award of Science and Technology for Young Scientists of China (2007), Distinguished Young Scholars Award of NSFC (2005), Young Scientist Award of Fok Ying Tong Education Foundation (2004), and Award for Best Doctoral Theses of China (1999). Currently, he is the secretary-general of Chinese Society of Theoretical and Applied Mechanics and the director of Institute of Biomechanics and Medical Engineering. He also serves as a member of editorial board of more than 10 journals. His current interests include molecular and cellular biomechanics, mechanics of biomaterials and soft matter, and fracture mechanics. He has authored and co-authored two books and 200 journal papers. Professor Hiroshi Okada Tokyo University of Science, Japan Title: Development of crack propagation analysis software system using the tetrahedral finite element and remeshings Abstract: In this research, we have been developing a fracture/crack propagation analysis system for damaged structures. The system can fully automate the crack propagation analysis. The analysis system is based on the Finite Element Method (FEM) to perform the solid mechanics analysis, the Delaunay tessellation technique to generate the finite element mesh and the Virtual Crack Closure-Method (VCCM) to compute the energy release rates and the stress intensity factors. The second order tetrahedral element is adopted to perform the finite element computations so that we can automate the mesh generation processes by using the Delaunay tessellation technique. VCCM for the tetrahedral element that was proposed by Okada et al. is adopted to compute the crack parameters. Programs to perform above mentioned processes along with predictions for the crack propagation direction and rate based on an appropriate criterion. Thus, the processes can fully be automated. In the presentation, the crack propagation analysis system and some numerical examples including some industrial and practical problems will be described. Bio data: BS.: Tokyo University of Science, 1986; Ph.D.: Georgia Institute of Technology, School of Civil Engineering, 1990; 1990-1991: Post Doctoral Fellow, Georgia Institute of Technology; 1992-1993: Nissan Motor Co., Ltd.; 1993-1996: Research Engineer, Georgia Institute of Technology; 1996-2009: Associate Professor, Kagoshima University; 2009-current: Professor, Tokyo University of Science. Professor Sau Cheong Fan Nanyang Technological University, Singapore Title: Challenges in simulation of break-up of concrete magazine and the debris throw Abstract: To determine the potential hazard zone around an ammunition storage magazine may not attract much attention of researchers who are not working on explosive safety. However, the challenges encountered in numerical simulation of the event are common to the computational community. The challenges stretch across many fields. It 13
The ICCM2012, Gold Coast, Australia involves multi-materials, highly-dynamic physics and chemistry. There are plenty of rooms for researchers in computational scientists to offer solutions to those challenges. Here, the challenges are grouped under three categories as follow. Material models: To derive the debris pieces form an initially intact concrete structure, it needs to go through several stages of simulations. Firstly, the explosive changes from solid state to gas state. It demands an accurate equation of state (EoS) which takes into account the time effect of burning rate. Secondly, the highly-pressurized gas (and air) inside the magazine interacts with the containing concrete structure. It requires a sound algorithm for interaction between Lagrangian and Eulerian elements to ensure little leakage. Thirdly, the concrete structure breaks up into debris. It demands a physics-based criterion for the fractural strength of concrete material to yield a realistic debris mass distribution. In defining the fracture strength under high strain rate, implementation of the dynamic magnification factor remains controversial. Flight aerodynamics: As the overpressure diminishes, the propelling force ceases and the debris begins its decelerating flight with different launching velocities. The accurate flight path can be derived from a set of differential equations having variable coefficients, involving physics of lift, drag and spin of debris flying from low speed to high speed (compressive flow) up to nearly Mach 1. In addition, cloud effect of the massive flying debris needs to be included. Unfortunately, little information is available for all these coefficients. Experimental investigation for selective cases and expanded by CFD simulation could offer a practical solution. Roll and bounce of debris: The debris may rebound upon its first and subsequent hitting of the ground, it could be still hazardous as its kinetic energy (mv2/2) may be large enough to cause casualty, particularly when the impact angle is small that causes the debris to ricochet with much of the kinetic energy remained. Little information for ricochet of debris is available. Once again, experimental investigation for selective cases and expanded by ALE simulation could offer a practical solution. Bio data: Dr. Fan currently is a Professor with the School of Civil and Environmental Engineering at Nanyang Technological University(NTU), Singapore. He specializes in numerical analyses of structures. He has been actively serving the numerical community for over twenty years, including as Member of the General Council of the Asia Pacific Association of Computational Mechanics (APACM), was Deputy Director of the Center for Advanced Numerical Engineering Simulations (CANES) set up in NTU, and was chairman/secretary of the organizing committee of many international conferences. Also, Professor Fan has been in the university education for nearly thirty years, with the major span of time serving NTU, where he developed and promoted the advanced courses on structural analyses. Currently, his research focus is on numerical modeling of concrete material and fluid-structure interactions, including applications to explosive-blast-magazine interaction. He is the Principal Investigator of the Explosive Safety program on debris hazard in NTU. Professor Noriyuki Miyazaki Kyoto University, Japan Title: Application of Computational Solid Mechanics to Reliability Studies of Electronic Packaging Abstract: Research activities on the application of computational mechanics in the reliability study of electronic packaging performed by a research group in Kyoto University are briefly introduced. Among them I will talk about the following two topics in detail: (1) Application of fracture mechanics to popcorn-cracking of plastic packages : Plastic packaging is the most popular technique to protect electronic devices from the external environment because of low cost and ease of manufacture. Plastic packages, however, sometimes fail due to cracks in the molding resin during the solder reflow process, when they absorb moisture. Such failure is called popcorn-cracking. Quantitative evaluation method is presented for the popcorn-cracking by using fracture mechanics. (2)Improvement of the numerical analyses by the strain measurement using the digital image correlation method (DICM) : Numerical methods such as FEM have been used to evaluate the reliability of electronic packages. However, the accuracy of numerical analyses of electronic packages should be confirmed by experimental measurements, because such analyses are nonlinear and very sensitive to the properties of constituent materials in the electronic packages. In this study, we evaluate the strain distribution in FC (flip chip) packages with a multi-layered PCB (print circuit board) by two methodologies. One is an experimental method known as DICM, and the other is the numerical method, FEM, with consideration of visco-elastic, elasto-plastic and creep behaviors. The measured results are compared with those of the finite element analyses. It is pointed out that the relaxation of Poisson's ratio of underfill resin must be considered for the accurate FE analyses. Bio data: Professor Miyazaki is a Professor of Mechanical Engineering and Science at Kyoto University. He received his Ph.D degree in Nuclear Engineering from University of Tokyo in 1977. After working at Japan Atomic Energy Research Institute as a Research Scientist for six years, he became an Associate Professor of Chemical Engineering at Kyushu University in 1983 and a Full Professor in 1996. He joined Kyoto University in 2004 as a Full Professor. Professor Miyazaki was President of Japan Association for Computational Mechanics (JACM) and Chairman of 14
Page 1 and 2: 4th International Conference on Com
Page 3 and 4: Dear Colleagues PREFACE The ICCM201
Page 5 and 6: ORGANISING COMMITTEE Chairman: A/Pr
Page 7 and 8: GETTING TO THE GOLD COAST The ICCM2
Page 9 and 10: Name: Professor Xiqiao Feng Institu
Page 11 and 12: Professor Gui-Rong Liu School of Ae
Page 13: The ICCM2012, Gold Coast, Australia
Page 17 and 18: Date Time (Start-End) Sunday 25/11/
Page 19 and 20: MINI SYMPOSIA The ICCM2012, Gold Co
Page 21 and 22: Date: 26 November 2012 - Cypress Ro
Page 23 and 24: Date: 26 November 2012 - Norfolk Ro
Page 25 and 26: Date: 26 November 2012 - Waratah Ro
Page 29 and 30: Date: 27 November 2012 - Norfolk Ro
Page 31 and 32: Date: 27 November 2012 - Waratah Ro
Page 35 and 36: Time ID Author* Title 10:30- 10:50
Page 37: Date: 28 November 2012 -Waratah Roo

detailed program for parallel sessions - The 4th International ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?