著者

鍋屋 剛志 稲田 茂昭 川向 克明 小澤 康男

出版者

一般社団法人日本機械学会

雑誌

茨城講演会講演論文集 : Ibaraki district conference

巻号頁・発行日

vol.2002, pp.245-246, 2002-08-23

被引用文献数

1

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Titanium and silicon were sputtered on the surface of the fiber polymer, using the low-temperature plasma. Tensile tests and hardness test were performed to check the mechanical properties, and these materials will be developed to the products as the high-performance fibers.

著者

山崎 彌三郎

出版者

一般社団法人日本機械学会

雑誌

日本機械学會誌 (ISSN:00214728)

巻号頁・発行日

vol.78, no.674, pp.66-72, 1975-01-01

著者

村上 香治 矢野 良和 道木 慎二 大熊 繁

出版者

一般社団法人日本機械学会

雑誌

ロボティクス・メカトロニクス講演会講演概要集

巻号頁・発行日

vol.2004, 2004-06-18

著者

郭 裕之 綱島 均 西 恭一 本庄 孝司 坂井 卓爾

出版者

一般社団法人日本機械学会

雑誌

交通・物流部門大会講演論文集

巻号頁・発行日

vol.2000, no.9, pp.89-92, 2000-12-12

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Several methods are proposed for investigating the complex traffic flow. However, the dynamics of vehicle and the driver's characteristic, which are important factor for the traffic flow analysis, are not considered enough so far. This paper describes a new concept for simulating complex traffic flow by multiagents. The agents are considered as a kind of artificial life (A-Life) and they behave based on their own knowledge independently. Drivers, vehicles, roads and traffic environment, which are essential elements in our simulation, are defined as the agents. The vehicle agent combined with a driver agent works based on driver's region of sight and their own characteristics. The road agent communicates with the vehicle agent responding velocity, position of the vehicle. The effectiveness of our new method for modeling the traffic flow is shown by simulation study.

著者

福島 章

出版者

一般社団法人日本機械学会

雑誌

年次大会講演資料集

巻号頁・発行日

vol.2008, no.9, pp.263-264, 2008-08-02

著者

小原 慎太郎 吉田 憲司 松本 忠義 片岡 勲

出版者

一般社団法人日本機械学会

雑誌

年次大会講演論文集 : JSME annual meeting

巻号頁・発行日

vol.2006, no.3, pp.5-6, 2006-09-15

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In this research, the practical correlation and flow regime model is proposed on the basis of heat transfer coefficient analyzed from boiling heat transfer experiment, under temperature control, using following experimental parameter: mass flux in upstream [kgm^<-2>s^<-1>] and sub-cooled temperature in upstream [K]. As the result, it is indicated that forced convective boiling heat transfer coefficient under high mass flux condition show higher value than that of pool boiling. Correlation for heat transfer coefficient and experimental value agree well in DNB region and is demonstrated adequacy and practicability. This flow regime model is presupposed as high concentration droplet flow. And it is also noted that the gravity and centrifugal force affect to the heat transfer coefficient in some experimental condition for horizontal straight or curve tube.

著者

松岡 久光 浦川 和馬

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集 (ISSN:00290270)

巻号頁・発行日

vol.18, no.76, pp.33-36, 1952-12-05

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No experimental data have been known quantatively concerning the effect of the low water level on the coefficient of heat transfer of boiling α. In preceding experiments we carried out, the normal water level was between 6 and 8 cm., and in the present experiment it is lowered from 6 to 0.5 cm., A heating surface which is made of a brass plate has diameter of 10 cm., Heat flux was changed from 8750 to 21800 kcal/m^2h. The conclusions are summarized as follows : (1) There is a notable difference between the temperature distribution corresponding to the level higher than 4 cm. and that lower than 3 cm., (2) It was found that the number of vapor columns on a surface n and α remained unchanged to a certain point, and then they increased slightly with the decrease in depth. (3) Being independ of the water level, every datum could be arranged on only one curve when we take a coordinate of α vs. n.

著者

近藤 惠嗣

出版者

一般社団法人日本機械学会

雑誌

日本機械学會誌 (ISSN:00214728)

巻号頁・発行日

vol.111, no.1070, 2008-01-05

著者

沢井 定

出版者

一般社団法人日本機械学会

雑誌

日本機械学會誌 (ISSN:00214728)

巻号頁・発行日

vol.68, no.560, 1965-09-05

著者

高橋 忠男

出版者

一般社団法人日本機械学会

雑誌

日本機械学會誌 (ISSN:00214728)

巻号頁・発行日

vol.74, no.625, 1971-02

著者

林 敏之

出版者

一般社団法人日本機械学会

雑誌

日本機械学會誌 (ISSN:00214728)

巻号頁・発行日

vol.101, no.952, pp.135-137, 1998-03-05

著者

柘植 綾夫

出版者

一般社団法人日本機械学会

雑誌

日本機械学會誌 (ISSN:00214728)

巻号頁・発行日

vol.104, no.986, pp.17-20, 2001-01-05

著者

茨木 博 橋本 巨

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. C編 (ISSN:03875024)

巻号頁・発行日

vol.75, no.757, pp.2596-2603, 2009-09-25

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This study is concerning the optimum design of a water nozzle for firefighting equipment used to protect large indoor spaces and high-rise buildings. Water nozzles for such use are required to have a long range of reach and/or a wide coverage. Such performance can be obtained by simply increasing the flow rate, but that is caused substantial pressure loss by the fluid friction within the nozzle and the pipe. The objective of this study is to obtain a water nozzle with minimum fluid friction by optimum design, as a result the size of piping, pump and water reservoir for firefighting equipment can be minimized. The conventional water nozzle used in firefighting is called the smooth bore nozzle, which have a wedge-shape profile whose diameter decreasing toward the exit. However, whether or not this shape is optimum have not been known. In this study, a method is presented to obtain a friction-minimum nozzle profile, while setting the inlet-and outlet-diameters and the length of the nozzle as fixed parameters. It was found that the half-spindle-type nozzle, whose diameter is almost constant along the length but quickly decreases at the exit, shows the smallest friction than the other profiles (i.e. smooth-bore, straight and concaved), therefore showing maximum arrival distance.

著者

山本 哲也

出版者

一般社団法人日本機械学会

雑誌

年次大会講演資料集

巻号頁・発行日

vol.2009, no.9, pp.190-191, 2009-09-12

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The new nuclear inspection system established by the Nuclear and Industrial Safety Agency (NISA) came into force in January 2009. The NISA focused on the maintenance program to set up the new system. The new inspection system require the report of the maintenance plan to the NISA, safety verification of the plan by the NISA, collection of deterioration data of facilities, reflection of the data on self check, and online monitor of concerned equipment. Utilities have reported approximately 30 of their maintenance plans to the NISA. The NISA carries the periodic inspections after it check those maintenance clans.

著者

仙波 浩雅 岡部 永年 山地 徹 沖田 圭介 山内 清 松本 賢哉

出版者

一般社団法人日本機械学会

雑誌

日本機械学会論文集 A編 (ISSN:03875008)

巻号頁・発行日

vol.71, no.709, pp.1234-1242, 2005

被引用文献数

1

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This paper deals with the bulge process for forming the single-stage bellows of TiNi shape memory alloys, which is proposed as a new type of seismic applications, and especially considering the material's special behavior. Thin walled tubes with 20% cold work, whose composition is Ti51.0 at% Ni, were prepared. First they are appropriately heat-treated and then the rubber bulge process is introduced for the tubes under the condition of austenite phase at room temperature. Displacement control method is adapted to the process. Theoretical prediction of change in outer diameter of the tube on compression is derived, and modified taking into account the progress of the stress-induced martensite transformation on tube's surface by observing the detachment of the oxide layer of the surface. Finally theoretical relationship between compressive displacement and the outer diameter of the tube, which is the most inportant for the design of the bellows shape, is cleared.

著者

川節 望 新藤 健太郎 田北 勝彦 増山 不二光

出版者

一般社団法人日本機械学会

雑誌

日本機械学会論文集. A編 = Transactions of the Japan Society of Mechanical Engineers. A (ISSN:03875008)

巻号頁・発行日

vol.74, no.741, pp.669-677, 2008-05-25

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Glass Fiber Reinforced Plastics (GFRP) have been applied to products such as building components and various structural materials in industrial plants due to their excellent lightness and corrosion resistance, as well as weather resistance since the 1980's. Use of GFRP for large-scaled components and/or components with repetitive load has increasingly widespread in recent years, and both tensile and compressive properties have thus become important. Reinforcing laminate for GFRP has been mainly woven fabric such as glass woven roving due to its easy handling. However, its fiber winding and gap occurrence have been problems to be solved. In the recent years, new fiber fabrics for reinforcement have come on the market owing to rapid development of weaving machine, and one of the new fabrics is the stitched fabric. This glass fiber stitched fabric has been increasingly developed in Europe and all over the world for over ten years, and in Japan, has extended its application for ship for about ten years. This study investigates and examines GFRP reinforced with unidirectional glass fiber stitched fabric, in respects of the effect of fiber laminated constitution, fiber content and fiber diameter on tensile and compressive properties. Additionally, this study also examines relevance between weaving patter of fiber and strength property by comparing 0 degree/ 90 degree stitched fabric with GFRP with general woven roving.

著者

大村 悦二 小川 健輔 熊谷 正芳 中野 誠 福満 憲志 森田 英毅

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. A編 (ISSN:03875008)

巻号頁・発行日

vol.76, no.764, pp.446-448, 2010-04-25

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In stealth dicing (SD), a permeable nanosecond laser is focused inside a silicon wafer and scanned horizontally. A thermal shock wave is propagated every pulse toward the side to which the laser is irradiated, then a high dislocation density layer is formed inside a wafer after the thermal shock wave propagation. In our previous study, it was supposed that an internal crack whose initiation is a dislocation is propagated when the thermal shock wave by the next pulse over-laps with this layer partially. In this study, a two-dimensional thermal elasticity analysis based on the fracture mechanics was conducted. The internal crack propagation was analyzed by calculating the stress intensity factor at the crack tips and comparing with a threshold of that. As a result, validity of the previous hypothesis was suggested.

著者

大村 悦二 小川 健輔 熊谷 正芳 中野 誠 福満 憲志 森田 英毅

出版者

一般社団法人日本機械学会

雑誌

M&M材料力学カンファレンス

巻号頁・発行日

vol.2009, pp.73-74, 2009-07-24

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In stealth dicing (SD), a permeable nanosecond laser is focused inside a silicon wafer and scanned horizontally. A thermal shock wave is propagated every pulse toward the side to which the laser is irradiated, then a high dislocation density layer is formed inside a wafer after the thermal shock wave propagation. In our previous study, it was supposed that an internal crack whose initiation is a dislocation is propagated when the thermal shock wave by the next pulse overlaps with this layer partially. In this study, a two-dimensional thermal elasticity analysis based on the fracture mechanics was conducted. The internal crack propagation was analyzed by calculating the stress intensity factor at the crack tips and comparing with a threshold of that. As a result, validity of the previous hypothesis was suggested.

著者

南斉 亮佑 中村 憲正 藤江 裕道

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. C編 (ISSN:03875024)

巻号頁・発行日

vol.76, no.769, pp.2340-2344, 2010-09-25

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We have been developing a new tissue engineering technique for cartilage repair using a scaffold-free tissue engineered construct (TEC) bio-synthesized from synovium-derived mesenchymal stem cells. A round-chondral defect of 8.5mm in diameter and 1.5mm in depth created on the medial condyle of 12 month-old mature porcine femur was filled with the TEC. Six months after surgery, a cylindrically shaped specimen of 4mm in diameter and 4-5mm in depth was extracted. Micro-indentation test was performed on the specimen using an AFM after the surface image of the specimen was obtained. Macro-scale compression test was, then, performed for the specimen using a custom made micro compression tester. As compared with many bump-like elevated portions of approximately 1-2μm in height observed in the surface of normal cartilage, rougher surface was observed in the TEC-treated and TEC-untreated tissues. The surface stiffness of the TEC-treated tissue was significantly lower than that of the normal cartilage, and slightly lower than that of the TEC-untreated tissue with no significant difference. In the quasi-static compression test, the tangent modulus of the TEC-treated tissue indicated no significant difference against the normal cartilage. In contrast, the tangent modulus of the TEC-untreated tissue was lower than those of the normal cartilage and the TEC-treated tissue, with a significant difference against the normal cartilage. It is suggested that the surface stiffness was independent of treatment of TEC, while the bulk modulus recovered well in the TEC-treated cartilage-like tissues as compared with the TEC-untreated cartilage-like tissues.

著者

堀 光平 林 巖

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. C編 (ISSN:03875024)

巻号頁・発行日

vol.62, no.596, pp.1548-1555, 1996-04-25

被引用文献数

6

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To improve the efficiency of 3K-type mechanical paradox planetary gear drive, a new design method called the approach-and recess-contact ratio equalization method is proposed and described. The concept of this method is to satisfy the coaxial condition of the rotatory- and fixed-internal gear pairs, which have a large influence on the efficiency of the gear drive, and simultaneously to maximize their efficiency. For this purpose, first the contact ratios of the two internal gear pairs are given ; second, their profile-shift coefficients are determined so that the coaxial condition can be satisfied ; then, the diameters of their addendum circles are determined so that their approach- and recess-contact ratios can be equalized. The efficiency of the gear drive obtained by this design method is theoretically calculated under the assumption that the tooth surface frictional coefficients are all 0.1. Consequently, the maximum efficiency of 86.1% is obtained on a gear drive with a reduction ratio of 1/351 and a contact ratio of 1.2. This obtained efficiency is higher by 12% and 8% than the efficiencies of 74% and 78%, obtained by the conventional design method without and with profile-shift coefficient optimization, respectively.