Pub Date : 1900-01-01DOI: 10.1299/transjsme.21-00186
Tomohiro Miyabe, Norio Yonezawa, Masafumi Nanba, Y. Soga
{"title":"Development of a torsional vibration suppression device using permanent magnets","authors":"Tomohiro Miyabe, Norio Yonezawa, Masafumi Nanba, Y. Soga","doi":"10.1299/transjsme.21-00186","DOIUrl":"https://doi.org/10.1299/transjsme.21-00186","url":null,"abstract":"","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122697795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1299/transjsme.21-00257
N. Moronuki, S. Sekino
Titanium dioxides (TiO 2 ) nano-rods array were fabricated on a fluorine-doped tin oxide (FTO) substrate leaving an array of star-like photoresist patterns array with regular spacing. The patterns were fabricated with a lithography, and the photoresist masked the hydrothermal process, in which chemical reactions proceeds in a sealed container at elevated temperature and pressure to produce regular structure of specific materials. Synthesized TiO 2 rods became single crystal rods and aligned perpendicular to the substrate because its lattice constant is similar with that of the substrate. Typical height was 3.4 μ m after 4 hours synthesis. Using the superhydrophilicity of TiO 2 after irradiation with ultraviolet light, the hydrophobic star-like areas were surrounded by hydrophilic TiO 2 area. On the tapered area of each star, the spread oil is ideally gathered at the center of the star due to the imbalance of interfacial tensions in water, which helps the oil droplet repellency. The functionality was evaluated with two experiments. One is the floating test in which the substrate was dipped into water with an oil droplet. The best case showed the droplet float in water. Another is the sliding angles measurement of oil droplet in water. It was found that both of the samples with/without pattern showed small sliding angle as approximately 10 °. The patterned sample showed longer functional life than that without pattern after one week. It was also found that the water trapped between the TiO 2 rods assists in repelling the oil droplet. without pattern was smaller than that with pattern, however, after six days, the situations were reversed, and patterned substrate kept lower sliding angle than that without pattern. The effectiveness of the star-like pattern is concluded as the long-life performance of oil repellent function.
{"title":"Patterned hydrothermal synthesis of TiO2 rods-array and its application to oil repellent surface in water","authors":"N. Moronuki, S. Sekino","doi":"10.1299/transjsme.21-00257","DOIUrl":"https://doi.org/10.1299/transjsme.21-00257","url":null,"abstract":"Titanium dioxides (TiO 2 ) nano-rods array were fabricated on a fluorine-doped tin oxide (FTO) substrate leaving an array of star-like photoresist patterns array with regular spacing. The patterns were fabricated with a lithography, and the photoresist masked the hydrothermal process, in which chemical reactions proceeds in a sealed container at elevated temperature and pressure to produce regular structure of specific materials. Synthesized TiO 2 rods became single crystal rods and aligned perpendicular to the substrate because its lattice constant is similar with that of the substrate. Typical height was 3.4 μ m after 4 hours synthesis. Using the superhydrophilicity of TiO 2 after irradiation with ultraviolet light, the hydrophobic star-like areas were surrounded by hydrophilic TiO 2 area. On the tapered area of each star, the spread oil is ideally gathered at the center of the star due to the imbalance of interfacial tensions in water, which helps the oil droplet repellency. The functionality was evaluated with two experiments. One is the floating test in which the substrate was dipped into water with an oil droplet. The best case showed the droplet float in water. Another is the sliding angles measurement of oil droplet in water. It was found that both of the samples with/without pattern showed small sliding angle as approximately 10 °. The patterned sample showed longer functional life than that without pattern after one week. It was also found that the water trapped between the TiO 2 rods assists in repelling the oil droplet. without pattern was smaller than that with pattern, however, after six days, the situations were reversed, and patterned substrate kept lower sliding angle than that without pattern. The effectiveness of the star-like pattern is concluded as the long-life performance of oil repellent function.","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"360 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122781427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1299/transjsme.22-00205
Ryota Shioya, D. Matsuura, Y. Sugahara, Y. Takeda
{"title":"Development of a cable-driven continuum robot having a large workspace (Mechanism design of a one-segment continuum robot focused on orientation workspace)","authors":"Ryota Shioya, D. Matsuura, Y. Sugahara, Y. Takeda","doi":"10.1299/transjsme.22-00205","DOIUrl":"https://doi.org/10.1299/transjsme.22-00205","url":null,"abstract":"","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122786124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1299/TRANSJSME.18-00395
Daijiro Ishii, Y. Mihara
Improvement of thermal efficiency is strongly required in internal combustion engine to promote environmental protections, it is important to clarify the mechanism and reduce cooling loss. Various methods have been proposed for measuring the cooling loss from the combustion gas to the combustion chamber wall, coaxial type thin-film temperature sensor is developed for wall temperature and heat flux measurement in this study. This sensor consists of thin-film and body and center wire, and there are three junction positions when the three materials are different. Therefore, it is necessary to use the same materials for thin-film and body or thin-film and center wire to make two junction points. In this study, as a method of forming thin-film on the sensor surface, not conventional metal plating method but sputtering method capable of forming various kinds of alloy materials and thickness of 0.1~1µm was chosen. It was evaluated the influence of differences in thin-film material on wall temperature and heat flux measurement by numerical analysis, as a result, the surface of sensor body (the same material as the combustion chamber) was hot junction by using the same material for the thin-film and center wire, it was suggested that high accuracy measurement is possible. And the sensor was attached to the cylinder head of gasoline engine and conducted experiments, and it was obtained the same result as the numerical analysis results. From these result, when high accuracy measuring wall temperature and heat flux with thin-film temperature sensor, it was found that it is important to use the senor body is the same material as combustion chamber wall and the thin-film is the same material as center wire.
{"title":"Influence of material of coaxial type thin-film temperature sensor on hot junction position and measurement accuracy","authors":"Daijiro Ishii, Y. Mihara","doi":"10.1299/TRANSJSME.18-00395","DOIUrl":"https://doi.org/10.1299/TRANSJSME.18-00395","url":null,"abstract":"Improvement of thermal efficiency is strongly required in internal combustion engine to promote environmental protections, it is important to clarify the mechanism and reduce cooling loss. Various methods have been proposed for measuring the cooling loss from the combustion gas to the combustion chamber wall, coaxial type thin-film temperature sensor is developed for wall temperature and heat flux measurement in this study. This sensor consists of thin-film and body and center wire, and there are three junction positions when the three materials are different. Therefore, it is necessary to use the same materials for thin-film and body or thin-film and center wire to make two junction points. In this study, as a method of forming thin-film on the sensor surface, not conventional metal plating method but sputtering method capable of forming various kinds of alloy materials and thickness of 0.1~1µm was chosen. It was evaluated the influence of differences in thin-film material on wall temperature and heat flux measurement by numerical analysis, as a result, the surface of sensor body (the same material as the combustion chamber) was hot junction by using the same material for the thin-film and center wire, it was suggested that high accuracy measurement is possible. And the sensor was attached to the cylinder head of gasoline engine and conducted experiments, and it was obtained the same result as the numerical analysis results. From these result, when high accuracy measuring wall temperature and heat flux with thin-film temperature sensor, it was found that it is important to use the senor body is the same material as combustion chamber wall and the thin-film is the same material as center wire.","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122872222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1299/transjsme.21-00200
Junpei Fujita, M. Shimoda
In this paper, we present a shape optimization method for periodic microstructures to maximize a specified vibration eigenvalue of a porous macrostructure. The homogenized elastic moduli calculated by the homogenization method are applied to the macrostructure to connect the microstructures with the macro structure. The KS function is introduced to solve the repeated eigenvalue problem hidden in vibration eigenvalue optimization. The shape optimization problem subject to the volume constraint considering the microstructures is formulated as a distributed-parameter optimization problem, and the shape gradient function is derived by the Lagrange multiplier method and the adjoint variable method. The shape gradient function is applied as a distributed force to update the design boundaries of the unit cells of the microstructures by the H 1 gradient method. The smooth boundary shapes obtained by the H 1 gradient method are suitable for manufacturing with a 3D printer. In the numerical examples, the eigenvalues and the optimum shapes were compared changing the number of the domains of the microstructures in the macrostructure. As a result, the effectiveness of shape optimization method for microstructures aimed at maximizing the vibration eigenvalue of a macrostructure was confirmed.
{"title":"Micropore shape optimization for natural vibration design of porous structures","authors":"Junpei Fujita, M. Shimoda","doi":"10.1299/transjsme.21-00200","DOIUrl":"https://doi.org/10.1299/transjsme.21-00200","url":null,"abstract":"In this paper, we present a shape optimization method for periodic microstructures to maximize a specified vibration eigenvalue of a porous macrostructure. The homogenized elastic moduli calculated by the homogenization method are applied to the macrostructure to connect the microstructures with the macro structure. The KS function is introduced to solve the repeated eigenvalue problem hidden in vibration eigenvalue optimization. The shape optimization problem subject to the volume constraint considering the microstructures is formulated as a distributed-parameter optimization problem, and the shape gradient function is derived by the Lagrange multiplier method and the adjoint variable method. The shape gradient function is applied as a distributed force to update the design boundaries of the unit cells of the microstructures by the H 1 gradient method. The smooth boundary shapes obtained by the H 1 gradient method are suitable for manufacturing with a 3D printer. In the numerical examples, the eigenvalues and the optimum shapes were compared changing the number of the domains of the microstructures in the macrostructure. As a result, the effectiveness of shape optimization method for microstructures aimed at maximizing the vibration eigenvalue of a macrostructure was confirmed.","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122872380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1299/transjsme.22-00275
Shun Watanabe, R. Morita, T. Yuasa
{"title":"Estimation method of pipe wall thinning tendency at T tube in actual plant","authors":"Shun Watanabe, R. Morita, T. Yuasa","doi":"10.1299/transjsme.22-00275","DOIUrl":"https://doi.org/10.1299/transjsme.22-00275","url":null,"abstract":"","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"591 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122935419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Study on particulate matter emission amount estimation model for engine control","authors":"Ryutaro Koiwai, Kazuhiro Oryoji, Shinya Sato, Akihiro Komori","doi":"10.1299/transjsme.22-00227","DOIUrl":"https://doi.org/10.1299/transjsme.22-00227","url":null,"abstract":"","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114253614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1299/transjsme.21-00175
K. Okada, A. Satoh
{"title":"Quasi-two-dimensional Brownian dynamics simulations on the aggregation phenomena of a cubic magnetic particle suspension in a rotating magnetic field","authors":"K. Okada, A. Satoh","doi":"10.1299/transjsme.21-00175","DOIUrl":"https://doi.org/10.1299/transjsme.21-00175","url":null,"abstract":"","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"169 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114437854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1299/transjsme.22-00017
Yukitada Sasage, T. Tomioka, Taisei Yamada, H. Hori
{"title":"A study on the loss factor identification for metallic materials and application for damping performance evaluation of laminated metal subject to heat treatment.","authors":"Yukitada Sasage, T. Tomioka, Taisei Yamada, H. Hori","doi":"10.1299/transjsme.22-00017","DOIUrl":"https://doi.org/10.1299/transjsme.22-00017","url":null,"abstract":"","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114477123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1299/transjsme.22-00116
S. Kurosaki, J. Shimura, Syuusaku Yamaji, Mitsutaka Kanehira, T. Shimura
{"title":"Development and analysis method of single element strain gage for stress intensity factor analysis in crack opening mode (2nd report, development of grid angle 104° K value gage)","authors":"S. Kurosaki, J. Shimura, Syuusaku Yamaji, Mitsutaka Kanehira, T. Shimura","doi":"10.1299/transjsme.22-00116","DOIUrl":"https://doi.org/10.1299/transjsme.22-00116","url":null,"abstract":"","PeriodicalId":341040,"journal":{"name":"Transactions of the JSME (in Japanese)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121847781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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