Department of Mechanical Engineering,Osaka University

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Complex Mechanics

The Complex Mechanics Area creates novel mechanical systems based on profound knowledge in fundamental mechanics.
Subareas
Solid Mechanics
Shibutani, Tarumi & Okumura Lab.
Our studies are focused on understanding solid mechanics phenomena which crossover multiscale time-space ranges. In order to link the hierarchical solid mechanics phenomena together, we are not only using many theoretical methods such as ab-initio calculations, mezoscopic simulations and macroscopic elastic-plastic finite element simulations, but also employing experiments such as the nano-indentation, the focus ion beam applied technique and the scanning electron-induced acoustic microscopy. We are also developing the dental occlusion analysis system by three-dimensional finite element method, interdisciplinarily collaborating to dentists.
Nanostructural Engineering
Hirahara Lab.
Nanosized materials have a large specific surface area and are different from bulk materials in crystalline structure, electronic states, mechanical properties and other physical quantities. From this point of view one can expect that current engineering is not directly applicable to nanomaterials. We are mainly working on development and systematization of “nanoengineering for nanomaterials consisting of carbon atoms as the main element”.
Theory and Application of Nonlinear and Nonequilibrium Phenomena in Fluid Mechanics
Yano Lab.
When we discard the assumption of continuum for gases and liquids, we have to confront a highly nonlinearity of dynamics of molecules and resulting nonequilibrium phenomena. Research activities in our laboratory mainly focus upon the theoretical treatment of such nonlinear and nonequilibrium phenomena that appear in the context of fluid mechanics.
Mechanical Dynamics
Ishikawa Lab.
We investigate theory and technology for understanding dynamics of machinery, particularly concerned with the machines that are "constrained" due to physical interaction with exterior environments. Topics range from mathematical principles such as analytical mechanics, nonlinear dynamics, robotics and mechatronics. to practical applications such as legged and undulatory locomotion, rolling robots and construction machines.
Reaction and Transport Dynamics in Energy Devices
Tsushima Lab.
We pursue mitigating gaps between theoretical thermal efficiency given by thermodynamics and state-of-the-art technologies in energy devices. We tackle minimizing energy losses by clarifying reaction and transport dynamics in the devices and improving a rate determining process for establishing next-generation energy devices. Our research interests currently cover polymer electrolyte fuel cells, flow batteries and separating/concentrating/filtering devices.
Cooperative Area
Laser Welding and Materials Processing
Kawahito Lab.
Fundamental studies are performed concerning the development of joining, surface modification and removal processing with a laser beam. In particular, the mechanisms of joining and imperfection formation are clarified by the high-speed observation and measurement of laser welding phenomena with the optical sensors or transmission imaging techniques. Further studies of monitoring, sensing, adaptive control and simulation of processing, disimilar materials joining, hybrid welding, etc. are undertaken on metalic, ceramic or prastic materials to obtain a basic knowledge in producing high quality welds at all times.