巻号一覧
39 巻 (2001)
- 6 号 p. 328-
- 5 号 p. 274-
- 4 号 p. 194-
- 3 号 p. 148-
- 2 号 p. 82-
- 1 号 p. 3-
前身誌
39 巻, 2 号
選択された号の論文の7件中1～7を表示しています
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＜解説＞
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筧 勝行原稿種別: その他
専門分野: その他
2001 年 39 巻 2 号 p. 82-88
発行日: 2001年
公開日: 2003/01/31
ジャーナル フリーAt Japan, the overall inspection of storage tank is according to the regulation. Recently, the deregulation such as the cycle of the overall inspection is requested. By the deregulation, the storage tank that there are few experiences of the overall inspection that are able to grasp the characteristic of storage tank is included. The technology standard for the attachments welded directly to pressure parts of the storage tank, is not sufficiently described. When the storage tank was long period operated, it is expected that the attachments to be welded directly to pressure parts of the storage tank decrease the safety of the storage tank. The technology standard regarding the attachments welded directly to pressure parts will be added on the technology standard of the storage tank. Furthermore, the loading/unloading frequency of the storage tank is becoming very severe for the profit improvement of a company. For the long period operated storage tank, the storage tank shall be operated and managed by the life management manual including the crisis control manual etc.抄録全体を表示PDF形式でダウンロード (421K)
＜論文＞
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臼井 俊央原稿種別: その他
専門分野: その他
2001 年 39 巻 2 号 p. 89-97
発行日: 2001年
公開日: 2003/01/31
ジャーナル フリーBallistic impact experiments were conducted on thin and middle purity titanium and Ti-6pct Al-4pctV alloy plates and other titanium alloy plates using projectiles with 5.56mm and 7.62mm diameter. The impact velocities were between 350m/s and 500m/s for the thin target plates, and were between 900m/s and 950m/s for middle target plates. The micro-structural damage mechanisms as adiabatic shear band (ASB) formation and dynamic fracture associated with impact were observed by optical microscope. Especially, observation of the fractured regions in annealed Ti-6Al-4V revealed the long crack connected ASB-cracks and bending crack at the bulging region, but as this long crack of Ti-6Al-4V did not find out in all other target plates. Ballistic results showed that both of strength and ductility are needed to increase the ballistic performance under high-strain-rate impact for thin target plates. It also showed high 0.2% proof stress (σ0.2) is needed to act as a resistance against projectile, and the considerations to depress an influence of the adiabatic shear band is also needed to degrease the formation of cracks and voids in the impact fractured region for middle target plates.抄録全体を表示PDF形式でダウンロード (1043K) -
臼井 俊央原稿種別: その他
専門分野: その他
2001 年 39 巻 2 号 p. 98-103
発行日: 2001年
公開日: 2003/01/31
ジャーナル フリーExperimental investigation of the penetration phenomena associated with oblique high-velocity projectile impact of composed of ceramic faced bumper plate and aluminum structural wall were carried out. The results showed that oblique high-velocity impact penetration phenomena were strongly dependent on impact obliquity. When the angle of obliquity is 30° or less, the center of the penetration projectile fragments traveled along a original projectile path and the center of the penetration ceramics fragments traveled along a near-normal path between the ceramics faced bumper plate and structural wall a distance 5.2cm away. Therefore, the overlapping of the projectile debris and the ceramics debris clouds concentrate and have a strong penetration damage potential for structural wall under this oblique impact condition. The optimal obliquity impact condition which can separate the projectile debris and the ceramic debris clouds and disperse their damage potentials is found to be effective in reducing structural wall damages. This optimal angle was estimated to have value between 45° and 50°.抄録全体を表示PDF形式でダウンロード (883K) -
小川 恒一, 澤井 猛, 越智 秀, 山本 義秋, 加賀 精一原稿種別: その他
専門分野: その他
2001 年 39 巻 2 号 p. 106-114
発行日: 2001年
公開日: 2003/01/31
ジャーナル フリーFriction welding of 6061 aluminum alloy pipes having 19mm inside diameter and 25mm outer diameter was carried out in order to examine the relationship between heat input or burn-off length and joint strength. An overall discution was carried out about the results of the pipe in this investigation and of the solid bar in the other one. From the experiment, it was noticed that the deformation heat input more related than the friction heat input to the joint strength and when the deformation heat input in the upset stage or the total stage was about 500J/s or more, sound joints could be produced. However, as it seemed that the deformation heat input in the total stage is not a pure input for joint formation, the deformation heat input in the upset stage may be taken into as a heat input. Moreover the deformation heat input in the upset stage was in proportion to the upset burn-off length, then sound joints could be produced with about 5mm or more upset burn-off length. Also sound joints of friction-welded 6061 aluminum alloy could be evaluated and produced with about 4×106Jm2/s or more deformation heat input per unit area in the upset stage and about 5mm or more upset burn-off length without relation to the shape of base materials respectively.抄録全体を表示PDF形式でダウンロード (903K) -
三村 宏原稿種別: その他
専門分野: その他
2001 年 39 巻 2 号 p. 115-121
発行日: 2001年
公開日: 2003/01/31
ジャーナル フリーThe threshold stress intensity factor for hydrogen embrittlement KIH has been measured by various methods, which have given a wide range of evaluated KIH values. The causes of the variety in the measured KIH are discussed in terms of R-curve, with comparison to some experimental results in literatures.抄録全体を表示PDF形式でダウンロード (397K) -
高木 勉, 竹村 勝朗原稿種別: その他
専門分野: その他
2001 年 39 巻 2 号 p. 122-129
発行日: 2001年
公開日: 2003/01/31
ジャーナル フリー150t/d Bituminous coal liquefaction pilot plant (PP), supported by New Energy and Industrial Technology Development Organization (NEDO), has been operated for the period 1967, 3∼1998, 9. For verifying of the materials selected in design of PP, the materials of equipment and pipes were investigated following 6200 hours of operation of PP, as a part of an overall coal liquefaction project.
The following features in coal liquefaction process were noticeable under the severe operation conditions.
.High temperature, high pressure and hydrogen service
.Corrosive compounds in coal
.High concentration of ash and slurry
In this report, the nondestructive inspection such as penetration test, magnetic test etc. and the fracture tests such as impact test, tensile test etc. were carried out, for the main equipment and pipes in the liquefaction unit of PP. The adequacy of the selecting materials in PP was confirmed through this inspection study. The selected materials are basically clarified. The most proper material selections, by the evaluation of the materials based on the results of this inspection study are expected, for the design of commercial plants.抄録全体を表示PDF形式でダウンロード (836K) -
神谷 篤志, 渡辺 修, 岡本 隆, 永田 茂原稿種別: その他
専門分野: その他
2001 年 39 巻 2 号 p. 130-140
発行日: 2001年
公開日: 2003/01/31
ジャーナル フリーDetermining how liquids in storage tanks respond to seismic waves with relatively long period components is important for the tank design and safety operation. The Earthquake-Proof Design Code for High-Pressure Gas Manufacturing Facilities [The High Pressure Gas Safety Institute of Japan, 1980] (under the provisions of the High Pressure Gas Safety Law) was used to examine LNG sloshing in inground storage tanks. These standards prescribe that such storage tanks with resonant periods greater than 7.5 seconds shall be examined either by inputting three sinusoidal resonance waves with 60cm displacement caused by the ground motion of earthquake, or by a time history response analysis assuming specific seismic waves for the construction site. Although there are many previous studies on sloshing phenomena [Zama, 1993], researches on sloshing caused by earthquake ground motions is incomplete, and this makes determination of the motion and velocity response spectrum difficult in actual design of tanks against sloshing. The authors studied input earthquake ground motions, in relation to sloshing, to be inputted in the performance design of LNG inground storage tanks to be constructed in the Tokyo Bay area, Negishi and Ogishima in Yokohama, and Sodegaura in Chiba. The following methods were used: 1) time history response analysis of wave amplitudes by simulating past destructive earthquakes as prescribed in the current High Pressure Gas Safety Law; and 2) obtaining velocity response spectra from simulated earthquake ground motion in the Tokyo Bay area using a semi-empirical method [Takamura and Ikeura, 1988] that includes up to ten second periods and evaluating the application to the sloshing performance design抄録全体を表示PDF形式でダウンロード (778K)
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