IRF'2013 Funchal/Portugal 2013
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4th International Conference on INTEGRITY, RELIABILITY & FAILURE (Funchal, 23-27 June 2013) |
Keynote Speakers The IRF'2013 program will include a number of Keynote Plenary Lectures by distinguished scientists in the different areas covered by the main theme of the conference, to provide thematic presentations of their most recent findings. The names of the following Keynote Speakers and the titles of their presentations have already been confirmed (ordered by date of confirmation):
Department of Industrial and Systems Engineering Rutgers University 96 Frelinghuysen Road Piscataway, NJ 08854,USA elsayed@rci.rutgers.edu
Dr. Elsayed is also a co-author of Analysis and control of Production Systems, Prentice-Hall, 2nd Edition, 1994. His research has been funded by the DoD, FAA, NSF and industry. Dr. Elsayed has been a consultant for AT&T Bell Laboratories, Ingersoll-Rand, Johnson & Johnson, Personal Products, AT&T Communications, BellCore and other companies. He served as the Editor-in-Chief of the IIE Transactions and the Editor of the IIE Transactions on Quality and Reliability Engineering. Dr. Elsayed is also the Editor of the International Journal of Reliability, Quality and Safety Engineering. He serves on the editorial boards of eight journals in different capacities. Dr. Elsayed has been involved in accelerated life testing since 1987 when he developed a reliability prediction model for the first transatlantic fiber optics cable during his sabbatical at Bell Laboratories. Since then he developed a general accelerated statistics-physics based model to predict reliability at normal operating conditions. During the last twelve years he has been extending his work to the degradation modeling area and design of accelerated life testing plans. He has verified his models by conducting extensive accelerated life testing on variety of products using the quality and reliability engineering laboratory at Rutgers.
Title of Presentation:
DESIGN FOR RELIABILITY AND MAINTAINABILITY
ABSTRACT Reliability is one of the key quality characteristics of products and it should be considered during the design and the operational phase of the product. This process begins with the component level, followed by subsystems levels and ends with the entire system level. At every level, reliability analysis needs to be performed, testing of the unit at that level also needs to be conducted at accelerated conditions and measurements such as degradation or failure time data are obtained in order to determine the reliability growth and estimate reliability at normal operating conditions. This talk will address approaches for considering reliability during the product life cycle, reliability prediction and reliability improvements. Maintenance approaches with emphasis on condition-based maintenance as well as the recent research in degradation modeling and its applications in maintenance will be presented and highlighted.
Advanced Materials and Manufacturing Laboratory, Mechanical Science and Engineering Department, Graduate School of Engineering, Nagoya University, JAPAN Email: ume@mech.nagoya-u.ac.jp
He received a Bachelor, a Master and a Doctor of Engineering from Tohoku University, Sendai, Miyagi in 1983, 1985 and 1988, respectively. He published research papers more than 120 in various journals, and hold 6 Patents on Magnetic Fluid Grinding. Dr.Umehara received the JSME Young Engineering award in 1991, 1995 LaRoux K. Gillespie Outstanding Young Manufacturing Engineer Award from the society of manufacturing engineers in 1995, F.W. Tayler Medal from the CIRP in 1995 and JSME paper award in 2010. He is member of the Japan Society of Mechanical Engineers (JSME), the Japan Society for Precision Engineering (JSPE), the Japan Society of Tribologist (JAST) and the Japan Society for Grinding Engineering.
Title of Presentation:
ULTRA LOW FRICTION OF AMORPHOUS CARBON NITRIDE WITH CONTROLLING NANO SURFACE STRUCTURE
ABSTRACT Amorphous Carbon Nitride (CNx) coating is one of the promising materials among carbon system hard coatings used to obtain excellent mechanical properties. The mechanical properties and the friction coefficient of the coatings depend on their synthesis techniques. In particular, we reported that CNx coating showed a friction coefficient lower than 0.01 when slid against a Si3N4 ball in N2. The mechanism of the low friction coefficient was considered to be the result of the sliding surface changing to a graphite-like structure by sliding in N2. Since the friction coefficient of the graphite layer was not as low as that of CNx, the specific characteristic structure of graphite on the CNx could govern the low friction coefficient. It is important to understand the detailed mechanism of the low friction coefficient of CNx in the optimum design of a solid lubricant. The effects of both nitrogen atoms in the coating and from ambient N2 gas on the transformation of surface layers of CNx were investigated. AES and XPS results demonstrated that the topmost layers of the coating changed to a graphite-like structure without nitrogen atoms when the friction coefficient decreased to below 0.01, and the graphitization of the topmost layers was attributed to the low friction coefficient in N2 gas. We first indicated N atom exodiffusion from the CNx surface during friction. It was confirmed that the strength of topmost layer of CNx after sliding in dry Nitrogen was smaller than the as-deposited CNx. It can be considered that this CNx is quite smart that can change and adjust the proper material properties after sliding. I believe that we should develop such smart tribo surface as the future tribo material that has both properties of ultra low friction and wear.
Director, Mechanics and Aerospace Design Laboratory University of Toronto, CANADA Email: meguid@mie.utoronto.ca
Title of Presentation:
NOVEL INTEGRITY ANALYSIS OF MECHANICAL SYSTEMS IN DYNAMIC CONTACT USING VARIATIONAL INEQUALITIES
ABSTRACT
Great strides have recently been made in the application of computational mechanics to the design of highly complex engineering systems. It has now become abundantly clear that advanced modelling techniques are central to the competitiveness of the industrialised nations. Excellent examples of this assertion are the computer-integrated design of the recent Boeing 777 aircraft, the collapsible foam-filled structures for the car of the next century and the design of finger implants. It is with this in mind that the author focuses his attention to a class of problems where dynamic contact mechanics plays a major role in dictating the mechanical integrity of the component/system. Three aspects of the work are accordingly examined. The first is concerned with the development of the appropriate dynamic variational inequalities expressions to accurately and consistently represent dynamic contact problems. The second is concerned with the development of robust solution algorithms that guarantee the accurate imposition of the kinematic contact constraint and avoid interpenetration of the mating bodies. The third is concerned with the integrity assessment of a number of realistic design problems involving intricate mechanical systems using the newly developed Variational inequalities algorithms.
Director, Institute of Dynamics and Control School of Aerospace Tsinghua University, P. R. China Email: xzhang@tsinghua.edu.cn
Title of Presentation:
RECENT DEVELOPMENTS ON MPM AND ITS APPLICATION IN IMPACT AND EXPLOSION SIMULATION
ABSTRACT
Dynamic response of material and structure under impact and blast loading involves extremely large deformation, multi-physics coupling and nonlinearities. Material Point Method (MPM), which makes use of both Lagrangian and Eulerian description of material, is suitable for modeling problems with extreme large deformation. In this talk, the basic formulation of MPM and our recent developments on MPM for impact and explosion problems are briefly reviewed, including an efficient implementation of MPM, improved contact method, adaptive material point method, parallelization based on OpenMP, material point finite element method, hybrid FE-MP method and adaptive FE-MP method. A 3D explicit parallel MPM code, MPM3D, has been developed for the numerical simulation of impact and explosive problems using object-oriented design by C++ program language with Qt, VTK and CMake, and can be run on different platforms including Windows, Linux and Mac OS. Several constitutive models, equations of state (EOS) and failure models have been implemented, such as Johnson-Cook material model for metal, Holmqusit-Johnson-Cook model and RHT model for concrete, Drucker-Prager model for soil and rock, Mooney-Rivlin model for rubber, Gurson model for elastic-plastic solid with void, Polynomial EOS, Jones-Wilkins-Lee EOS and Gruneisen EOS. Several numerical examples such as explosively driven flyer, shaped charge, debris cloud, projectile penetration of steel plate and reinforced concrete, slope slide and metal cutting are presented to demonstrate the application of MPM3D, which shows that MPM3D is a powerful tool for impact and explosion simulation.
Page created on 15 March 2012 / Last update on 17 August 2012 |
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