Reserch Material Mechanics・Materials Strength Effect of Burnishing on Fretting Fatigue Strength of Aluminium Alloy (A7N01) Student：Takahiro SUZUKI Keyword Plain Fatigue, Fretting Fatigue, Roller Burnishing Fretting Fatigue Testing Abstract Plain fatigue and fretting fatigue tests were carried out using roller burnished aluminum alloy (JIS A 7N01). The fatigue limits at 108 cycles were 220MPa for plain fatigue and 60MPa for fretting fatigue. The ratio of fretting fatigue limit to plain fatigue limit(σwf/σw) for the present material was about 0.27. Plain fatigue strength of the specimen with roller burnishing treatment was a little higher than that of the untreated specimen. On the other hand, fretting fatigue strength of the specimen with roller burnishing was significantly high to that of untreated specimen at low stress level. The reason was mainly caused by high hardness on the surface, compression residual stress of roller burnishinig specimen. Probabilistic Approach for Fracture Strength Estimation of Brittle Material under Variable Load Rate Student：Ryosuke WATANABE Keyword Brittle material, Slow crack growth, Variable load, Equvalent fracture strength Four-point Bending Test Abstract This study presents probabilistic approach for the fracture strength estimation of brittle material under variable load rate. It has been explained that the time-dependent fracture of brittle materials generally occurs due to the slow crack growth at an initial flaw. In addition, the fracture strength has large scatter. Therefore, some probabilistic fracture strength estimation models have been proposed on the basis of the fracture mechanics and statistical approach. These models are assumed that the time-dependent fracture occurs under constant quasi-static load, static load and cyclic load. However, actual equipment is subjected to variable load. Consequently, a probabilistic model for the fracture strength estimation of brittle materials under variable load was proposed on the basis of the slow crack growth low concept in conjunction with two-parameter Weibull distribution. Next, the four-point bending test was carried out for glass under two-step variable load rate. The experiment result was compared with the predictions to verify the validity of the model. Seeling Perfomance of Large Diameter Gasketed Flanged joints Student：Masahiro KOGASAKA Keyword Stress analysis, Leakage test, Sealing Performance, Pipe Flange Connections, Larger Diameter flange Flat Face Flange Abstract In these environmentally sensitive times, it is very important to reduce the amount of gasses released into the environment from pipe flange connections.So we analyze deformation and strain of large diameter flange. And then we conduct verification experiments for analysis.Next, we research the possibility of the calculation about Sealing Performance of the flange by gasket characteristic. Sealing Performance and Mechanical Properties of Gaskerts at Elevated Temperature Student：Taiki HAGIRI Keyword Gasket, Leak Tightness, Deformation Characteristics, Thermal Expansion, Elevated Temperature Elevated Temperature Testing Machine Abstract This paper deal with sealing performance and mechanical properties of gaskets at elevated temperature. Recently leak accident rarely occurs from flanged connections with gasket at elevated temperature in factories such as chemical plants. This study measured mechanical properties (such as young’s modulus, viscoelastic characteristic and thermal expansion) and sealing performance of gasket at elevated temperature. So closed flange used measured changes axial tension with bolts and sealing properties.The research results determine gasket properties for safety design flanged connections with gasket. Control Engineering Compact Magnetic Levitation System considered using ease of Engineering Learning Tool Student：Yuki SANO Keyword Magnetic Levitation, Education support, PSoc micro computer, Disclosure of Informaiton Magnetic Levitation System Abstract Mechatronics industry is growing recently, using control circuit or program by mechanical engineering technician begin to become commonplace. This site reports the compact magnetic levitation system which is easy to utilize for education, with maglev technology used linear-motor train. The educational tool are aiming to study both calculation of intensity and control theory. DC Motor Control System considered using ease of Engineering Learning Tool Student：Shoma FUSHIMI Keyword PID Control，Auto Tuning ,Learning Tool of Control Engineering，DC Motor DC Motor Control System Abstract Recently, electric vehicle, electric scooter, etc. came to be used practicably. Thus, the control engineering has gotten an increased attention. On the other hand, the student who don’t like control engineering is increasing tendency. In this research, it is an aim to provide the device that students feel easily understandable. In addition, we have entertained the supplement auto tuning function to meet the aim. And we have sought method that is practicable to DC motor control system or Inverted pendulum. Combustion Engineering Quantitative analysis of MgB2 by X-ray diffraction Student：Syohei MOCHIZUKI 　 Keyword MgB2, Combution synthesis, X-ray diffraction, Quantitatire analysis Combustion Synthesis Device Abstract MgB2 has the highest critical temperature of 39K among metallic superconductors. We apply the self-propagating high-temperature synthesis to obtain high-purity MgB2. X-ray diffraction is attempted to analyze the material quantitatively. Fluids engineering Analysis Motion in Backward Fall of People and Measurement Statics Characterization of Air Cushion Student：Akihiro SHIBANO 　 Keyword Pneumatics , Motion Analysis , Impact Absorption , Large Deformation Simulated Fall Test Abstract This study conducts two kinds of experiment.We analyzed motions in backward fall of four subjects using technique of motion capture. We applied load to air cushion in order to examine the static characteristics.