巻号一覧
37 巻 (1999)
- 6 号 p. 356-
- 5 号 p. 290-
- 4 号 p. 206-
- 3 号 p. 120-
- 2 号 p. 58-
- 1 号 p. 3-
前身誌
37 巻, 4 号
選択された号の論文の7件中1～7を表示しています
- |<
- <
- 1
- >
- >|
-
小倉 信和1999 年 37 巻 4 号 p. 206-217
発行日: 1999/07/25
公開日: 2010/08/05
ジャーナル フリーA jumbo jet airplane crashed in Japan, August 1935. Total 524 men snd women boarded and only 4 women survived. In 1973, the plane landed at OSAKA airport, and then the tail of body get bumped against on the runffield and repaired.
The wrong repair was occured in the joint of upper half and lower half parts of pressure bulkhead for about one meter. This place should be connected by double riveted joint. But the work was done by single rivet joint because the workers had no expert knowledge.
This experimental study was carried out to confirm strength of single riveted joint. In case of faying surface seal do not paste, the fatigue strength of riveted joints increases linearly for the diameter of upset head. When faying surface seal was used and a diameter of upset head was less than 6.5mm the fatigue strength of joints decrease about 1/3 for not used faying surface seal. By this tendency, it can be estimate that the pressure wall accident was conducted.
The working management should be circumspective, that is, the double rivet joint does not make the single rivet joint. It can be say that it must be added the item measuring diameter of upset head.抄録全体を表示PDF形式でダウンロード (5297K) -
小笹山 弘之, 宇野 義明, 新井 功, 佐藤 拓哉1999 年 37 巻 4 号 p. 218-225
発行日: 1999/07/25
公開日: 2010/08/05
ジャーナル フリーIn designs for piping with refractory lining used in Residue Fluid Catalytic Cracking Process (RFCC) and Fluid Catalytic Cracking Process (FCC) of a refinery, no influential design factors are considered, such as the effects of lining stiffiness and the difference of themal expansion between pipe and lining.
However, influences of lining due to its stiffness and the difference of themal expansion between pipe and lining would not be negligibly small. This paper proposes a new stress analysis method for piping with lining. The analysis is performed by a piping stress analysis program.
The pipe and lining are modeled by beam elements. This method applies a modified flexibility factor and a modified stress intensification factor for pipe and lining respectively. These two kinds of factors are individually obtained by comparing the results of FEManalysis using 3D shell/solid elements with the results of piping analysis by beam theory. The experiments for piping without lining and piping with lining were carried out at room temperature, and the validity and accuracy of the proposed method were verified by comparing the experimental results.抄録全体を表示PDF形式でダウンロード (1039K) -
朝比奈 稔, 西田 隆仁, 山中 幸1999 年 37 巻 4 号 p. 226-234
発行日: 1999/07/25
公開日: 2010/08/05
ジャーナル フリーThis paper deals with the sealability of gaskets at room temperature for liquid and gas fluid. A method for measuring liquid leakage is proposed and the liquid leakage is measured. In addition, the liquid leakage is calculated by converting gas leakage obtained from the results of room temperature tightness test (ROTT).
The experimental results using metal C-ring nearly equals the calculated results. So we confimed that a converting method for liquid leakage is proper.
On the other hand, the experimental results using compressed fibers sheet gaskets were ten times smaller than the calculated results. Therefore ROTT can't be applied to design of bolted flanged joints when liquid fluid is used. Accordingly, it is concluded that ROTT for liquid fluid must be measured.抄録全体を表示PDF形式でダウンロード (1197K) -
瀧口 明広, 入江 俊和, 田村 吉章, 寺田 則仁, 西岡 信之, 切東 章浩1999 年 37 巻 4 号 p. 235-243
発行日: 1999/07/25
公開日: 2010/08/05
ジャーナル フリーThe various nondestructive testing methods are practically used for flaw detection at material state, welding inspection in the production stage and crack detection in the maintenance stage. The technologies in the normal temperature and the high temperature were established for these nondestructive testing methods. However, the technologies under the very low temperature (-196°C) have not been practically established yet.
Three techniques, namely Ultrasonic Testing (UT), Electromagnetic Acoustic Testing (EMAT), and Eddy-Current Testing (ECT), have the possibility of realization for nondestructive testing under the very low temperature.
The influence of the boundary noise of ECT is so large when the component elements of the welding material and the base metal material are different. Only the defefct in the vicinity of the surface can be detected. The application of ECT is very difficult from the above characteristics.
EMAT will be able to use even at the low temperature. But, the resolving power is low because the low frequency wave is used. And, the operability of the sensor is difficult for the magnetized material.
As for the Ultrasonic testing, the determination of the defect size is possible.
So we developed the inspection technology under the very low temperature (-196°C) using the Ultrasonic testing.抄録全体を表示PDF形式でダウンロード (4073K) -
第1報鏡 孝1999 年 37 巻 4 号 p. 244-251
発行日: 1999/07/25
公開日: 2010/08/05
ジャーナル フリーPDF形式でダウンロード (997K) -
松室 昭仁1999 年 37 巻 4 号 p. 252-260
発行日: 1999/07/25
公開日: 2010/08/05
ジャーナル フリーHigh pressure treatment techniques have been one of the most unique tools controlling for thermodynamics of materials. They have been widely used as a synthesis technique of new materials in fields of science and technology. This article shows the overview of a high pressure generation technique and thermodynamic considerations of high pressure phases diagram in alloys. As a example of the application of this technique to alloys, changes of phase diagram in aluminum-rich Al alloys and their mechanical properties were also shown.抄録全体を表示PDF形式でダウンロード (1276K) -
熱応力・高圧力相転移を中心として小竹 茂夫, 妹尾 允史, 近藤 巌1999 年 37 巻 4 号 p. 261-270
発行日: 1999/07/25
公開日: 2010/08/05
ジャーナル フリーThe phenomena under high pressure, such as a change of elasticity and a phase transition, are explained from the theory of electrons and phonons. Pressures of electron and phonon gas express a simple pressure-volume relation and a phenomenon on thermal expansion. According to quantum mechanics, we also introduce the probability density of stress on electron, σ, from the wave function to interpret the phase transition under high pressure and an uniaxial deformation. Change of the distribution of σ expresses the switching of bonds between atoms at the critical pressure. We emphasize the importance to undesstand the phenomenological parameters from intrinsic point of view.抄録全体を表示PDF形式でダウンロード (1591K)
- |<
- <
- 1
- >
- >|