In terms of education, our laboratory is responsible for Mechanical Materials Science 1 and Industrial Mechanics in 1st year, Materials Mechanics 1-3 in the second and 3rd year, as well as Mechanical Engineering Experiments 1 and 2, Machine Work Training, and Materials Strength Science in 3rd year. Furthermore, we are also in charge of Nano-Macro Integrated Materials Strength Science in Graduate School. There are various causes of accidents that occur during the operation/use of equipment, but in order to prevent such accidents and design and manufacture safe equipment and structures that can be used with confidence, it is extremely important to acquire knowledge and ways of thinking about the strength and fracture of materials. In this laboratory, students will conduct experiments and analyses on material strength as part of their graduation research, and learn approaches to problems related to strength and fracture, which are essential for mechanical engineers.
Basic Information
Faculty name/Affiliation
Tsuyoshi Isogai / Mechanical and Aerospace Engineering Course Department of Integrated Science and Engineering and Engineering
Specialized Fields
Mechanics of materials, Strength and Fracture of Materials
Research theme
Research on material strength and fracture necessary to ensure the safety of equipment and structures
Study on fatigue resistance reliability of heat-resistant materials under combined stress In high temperature equipment such as jet engines, there are members to which combined stress such as bending and twisting is applied during operation. In this theme, we will conduct a fatigue test at high temperature under the condition that tension and shear are applied at the same time, and examine the prediction method of "how long can it be used?" (Life) required for equipment design. In addition, we will conduct computer analysis by the finite element method under the same conditions, and consider the mechanism of "fatigue" fracture in which members etc. are fractured by repeated loading in the case of combined stress.
Research on electrical crack length measurement method In high temperature equipment, it is a big problem in maintenance management that defects and cracks occur and grow in parts during operation. In high temperature crack growth tests, which are conducted to collect basic data on this issue, it is extremely difficult to directly observe and measure the test material during the test. Therefore, a method (electric potential method) is used to measure the crack length by utilizing the property that the electrical resistance of the member increases as the cracks and defects inside the material increase. In this study, we will conduct an experimental and analytical study with the aim of constructing an electrical crack length measurement method that can be applied to tests under multiaxial and combined stress conditions.
Research on application of biomimetics to strength of materials In recent years, the field of "biomimetics", which applies the excellent properties of animals and plants in the natural world to engineering, has been attracting attention. An example of application in this field is that the leading car of the Shinkansen train is shaped like a kingfisher's beak to reduce air resistance when entering a tunnel and reduce noise. In this study, we will experimentally examine the strength characteristics of bamboo, which is a familiar natural material, for the purpose of examining the application of biomimetics to the strength of materials. Bamboo is known to be mechanically elastic and tough, so it is expected that it will be applied to the development of new materials by elucidating its strength development mechanism.
Papers and Conferences Presentation
Paper presentation
Title
Laboratory
Contents
Electrical potential method for high temperature multi-axis fatigue crack growth