著者
臺丸谷 政志 小林 秀敏 PEARSON James Todd PEREZ Jose Luis 斉藤 文護
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.64, no.623, pp.2417-2423, 1998-07-25
被引用文献数
1

The present study is concerned with the estimation of power in Karate-doh. The measuring method and numerical estimation for impact forces produced by Karate-doh hand techniques such as Syutoh-uchi, Tettsui-uchi and so on, are discussed by experiments (by means of Tameshi-wari) and numerical simulations. In the beginning, an impact experiment of simply supported concrete beams was conducted to examine the impact response and the impact breaking of the concrete beam. And then Tameshi-wari of simply supported concrete beams was performed. In order to understand the mechanism of impact breaking of concrete beams by Karate-doh hand techniques, a numerical simulation was also carried using a dynamic finite element method with a Newmark-β method. The impact force generated between the hand and the concrete beam was estimated to be beyond 4.5 kN. It was also found that a reaction at both ends of the beam was almost never generated by virtue of the dominant modes of bending deformation of the beam. This indicates that, by means of Tameshi-wari, the impact breaking of the concrete beam floating in air is quite within the bounds of possibility. Therefore Tameshi-wari for concrete beams suspended in air was also tried and achieved the predicted results.
著者
長屋 幸助 小島 多香子 細谷 俊介 葛 徳梁 安藤 嘉則
出版者
一般社団法人日本機械学会
雑誌
Dynamics & Design Conference
巻号頁・発行日
vol.2004, pp."753-1"-"753-6", 2004-09-27

Changing diapers hurts prides of the patient, so that a panty type toilet that can be worn to the patient is of importance., in which feces and urine are washed automatically. One of the panty type toilets has been reported. In the report, however, the principle of the toilet was only discussed, and so it cannot be used in practice, because of lack of production process. In addition, since the clamp up pressure to the body was not controlled, it often gives pains to patients. The present article gives a method of producing the panty type toilet, and a new rotary type electromagnetic valve, and a method of pressure control is presented. To have cheaper toilet, this article also provides a device of detecting faces and urine by using a humidity sensor. Some demonstrations are performed for the toilet made in this experiment.
著者
横山 孝男 梅宮 弘道 寺岡 達夫 渡部 英男 桂木 公平 笠原 敬介
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. B編 (ISSN:03875016)
巻号頁・発行日
vol.46, no.402, pp.322-330, 1980-02-25
被引用文献数
7

日本のような温帯性気候では夏は猛暑に冬は豪雪に悩むところが多いが,本研究では夏野猛暑(冬の酷寒)を地下水に託し井戸より人工かん養し大地の断熱性と帯水層の大熱溶量性により季節的に畜熱し冬季暖房・消雪(夏季冷房)に結びつけるものである.本論では野外実験と数値解析により夏季かん養温度の40%を冬季まで蓄積可能なことを明らかにし熱汚染を防止し,効果的な季節的畜熱を行うための適正井戸間隔を提示するものである.
著者
浜田 実 渋谷 陽二
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.50, no.452, pp.584-592, 1984-04-25

複数の自由縁の円孔を持つ円板の曲げ問題の解法として,極座標に対する重調和方程式の一般解を繰返し用いる方法を提案し,これにより,偏心位置に1円孔または対称位置に等大2円孔を持つ円板の外縁に一様曲げモーメントが作用する場合と,中央集中荷重が作用する場合の解を求める.また有限要素法と実験による結果と本解とを比較することにより,本解の妥当性を確かめる.
著者
久森 紀之 野末 章 木村 雄二
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.67, no.657, pp.844-851, 2001-05-25
被引用文献数
2

High-temperature and high-pressure water corrosion behaviors of Y_2O_3 doped Zirconia (ZrO_2) were investigated in term of with the microstructural changes, residual strength characteristics and tetragonal to monoclinic phase transformation. Sintered ZrO_2 ceramics bodies with 2, 3, 4, 6 and 8 mol% Y_2O_3 doped ZrO_2 were made using a pressure less sintering method at 1 450℃, respectively. These ZrO_2 ceramics were corroded in high-temperature and high-pressure water condition such as 150℃〜300℃. Corrosion damage of the decrease Y_2O_3 dope ZrO_2 ceramics occurred preferentially on ZrO_2 particle after long-term immersion in high-temperature and high-pressure water environment. The tetragonal to monoclinic phase transformation occurred in decrease Y_2O_3 doped tetragonal ZrO_2 ceramics due to high-temperature and high-pressure water corrosion. For improvement of the corrosion characteristics (thermal stability) of the ZrO_2 ceramics, are important increasing the Y_2O_3 doped within a range in which no remarkable residual strength degradation is recognized. CeO_2 doped ZrO_2 ceramics were useful to improvement the thermal stability of Y_2O_3 doped ZrO_2 without loss of the fracture strength. CeO_2 doped ZrO_2 ceramics also have superior residual strength characteristics compared to Y-ZrO_2 ceramics. In addition design concepts used to obtain water-corrosion-resistant high strength and high toughness ZrO_2 ceramics were proposed.
著者
瀬田 英介
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.106, no.1015, pp.iii, 440-441, 2003-06-05
被引用文献数
1