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後続誌
- JSME International Journal Series C Mechanical Systems, Machine Elements and Manufacturing
- JSME International Journal Series B Fluids and Thermal Engineering
- JSME International Journal Series A Solid Mechanics and Material Engineering
- JSME international journal. Ser. C, Dynamics, control, robotics, design and manufacturing
- JSME international journal. Ser. 3, Vibration, control engineering, engineering for industry
- JSME international journal. Ser. 2, Fluids engineering, heat transfer, power, combustion, thermophysical properties
- JSME international journal. Ser. A, Mechanics and material engineering
- JSME international journal. Ser. 1, Solid mechanics, strength of materials
- JSME international journal
21 巻, 158 号
選択された号の論文の17件中1～17を表示しています
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Motohisa HIROSE, Norihiko HASEGAWA, Yozo KATO1978 年 21 巻 158 号 p. 1201-1207
発行日: 1978年
公開日: 2008/02/15
ジャーナル フリーSmooth, notched and precracked specimens were fatigued in rotating bending at elevated temperature. A comparison of the fatigue limit at 375°C with that at room temperature indicates that the fatigue strength is enhanced by the rapid strain ageing occurring during fatigue at 375°C. While the increase in the crack initiation fatigue limit of smooth and notched specimens were about 24% and 28% respectively, the increase in the crack propagation fatigue limit of notched specimen was about 56%. The notch root radius at the branch point at 375°C becomes about two times that at room temperature. The increase in the fatigue limit of precracked specimen which contains a crack of 0.15 to 1.4 mm length is 40 to 110%. It is concluded that the rapid strain ageing has a greater influence on the critical stress for crack propagation and on the threshold stress intensity factor than on the critical stress for crack initiation.抄録全体を表示PDF形式でダウンロード (773K) -
Sadayuki UJIHASHI, Hideyuki WAKAI, Hiroyuki MATSUMOTO, Ichiro NAKAHARA1978 年 21 巻 158 号 p. 1208-1215
発行日: 1978年
公開日: 2008/02/15
ジャーナル フリーIn this paper, the dynamic displacements and stresses of a cantilever circular cylindrical shell, which is suddenly loaded by shearing forces on its free edge, are analyzed within the framework of Flugge's shell theory. As a result, it is shown that the radial displacement and the membrane force variations in time are much affected mainly by the lowest mode, and the bending moment variations are also affected by the higher mode, and in the case of a short cylindrical shell the dynamic factor, defined by the ratio of the dynamic maximum value to the static one, for the radial displacement at the free edge is smaller than 2 and that for the bending moment at the fixed edge is larger than 2, and as the cylindrical shell becomes long, that for each case tends to 2.抄録全体を表示PDF形式でダウンロード (732K) -
Kazumi MURAKAMI, Yasunori MURAKAMI1978 年 21 巻 158 号 p. 1216-1221
発行日: 1978年
公開日: 2008/02/15
ジャーナル フリーThe moire rosette method is a convenient means for determining the principal strains and their directions at any point on a largely deformed body. The authors proposed previously that the use of master grids with different mismatch values is effective for determining the principal axes or for discriminating the sign of principal strains. But this method has a drawback that many master grids with different mismatch values must be prepared. In this paper, a new method for determining the principal strains by the mismatch changing procedure only is proposed, and an equipment is presented, with which grids with any mismatch values can be obtained. Besides, the practicability of this new method is discussed.抄録全体を表示PDF形式でダウンロード (759K) -
Kazunori KATO, Tadao MUROTA, Akira ISHIDA1978 年 21 巻 158 号 p. 1222-1227
発行日: 1978年
公開日: 2008/02/15
ジャーナル フリーA new interferometry for measurement of shear strain and rotation in an in-plane deformation is proposed. In this method the grating printed on an object is photographed on film or plate and four copies (say, specimen gratings) are prepared at first. Then two pairs of these specimen gratings are placed in both of optical paths in Mach-Zender Interferometer, respectively, and diffraction beams of diffraction beams at pairs of the gratings are used for producing an interference pattern. This is corresponds to a contour of shear strain γxy or rotation ω. Here, orders of diffraction beams to be used and directions toward which gratings are shifted are chosen according to γxy or ω. This method can also be applied to measurement of higher order differences of displacement. Some other modifications of the method are given and their properties are discussed.抄録全体を表示PDF形式でダウンロード (1210K) -
Yoshihiko SUGIYAMA, Kouitu ASHIDA, Haruo KAWAGOE1978 年 21 巻 158 号 p. 1228-1235
発行日: 1978年
公開日: 2008/02/15
ジャーナル フリーThe instability of long columns subjected to distributed conservative loading is studied theoretically and experimentally. The equilibrium equation is solved by assuming an infinite power series solution. The first two critical lengths of the columns and the corresponding buckling modes are calculated for six typical sets of boundary conditions. The stability of a long vertically cantilevered column is investigated experimentally by the static and dynamic methods. The experimental results and the theoretical predictions show very good agreement. The second buckling mode is also demonstrated experimentally to verify the theoretical results.抄録全体を表示PDF形式でダウンロード (787K) -
Kozo OSAKADA, Akihiro WATADANI, Hideo SEKIGUCHI1978 年 21 巻 158 号 p. 1236-1243
発行日: 1978年
公開日: 2008/02/15
ジャーナル フリーTorsion tests under pressures of up to 4 kbars are carried out to investigate the mechanism of ductile fracture of 0.033 ∼ 0.54 % carbon steels of various microstructures. It is found that the strain at which fracture-nuclei begin to grow is affected by the carbon content, shape of cementite and hydrostatic pressure, whereas the strain from the beginning of nuclei-growth to fracture is not affected by these factors. A criterion for ductile fracture which accommodates the metallurgical factors is proposed. Microscopic observation of fracture process of 0.25 % carbon steel is carried out under a scanning electron microscope. The observed result is related with the initiation strain of nuclei-growth.抄録全体を表示PDF形式でダウンロード (1112K) -
Suguru ARIMOTO, Mohamed Youssef GAAFAR1978 年 21 巻 158 号 p. 1244-1249
発行日: 1978年
公開日: 2008/02/15
ジャーナル フリーThis paper is concerned with the problem of optimal control for systems which are linear in control but nonlinear in state. It is shown that there is a large class of control systems in which optimal singular trajectories are allowed to lie only on a certain hypersurface when a condition similar to the normality condition for linear time-optimal control systems is fulfilled. It follows from this result that the optimal control becomes totally bang-bang or totally singular. Furthermore, for a special class of position control systems including a nonlinear element and a controller, it is proved that the optimal control becomes totally bang-bang, provided that the controlled system is controllable and observable. Finally some practical examples are given to see whether the proposed criterion is applicable or not to characterizing the type of optimal control.抄録全体を表示PDF形式でダウンロード (648K) -
Masataka MATSUI, Michinari YAMANOUCHI, Takanori MINAMI, Masaaki WATANA ...1978 年 21 巻 158 号 p. 1250-1257
発行日: 1978年
公開日: 2008/02/15
ジャーナル フリーTo investigage the behaviors of a running vehicle with automotive tires on the guideway, a simulation model is developed with a three dimensional model of the vehicle body and a guide mechanism with the inertia and dash-pots. The model is successfully compared with the experimental data of a test vehicle which was an automotive truck with the mechanical guidance, and a characteristic equation is derived which is to be examined to explain the effects of the dynamical parameters of the guide mechanism such as inertia and damping factors on the running stability of the vehicle.抄録全体を表示PDF形式でダウンロード (740K) -
Yasuki NAKAYAMA, Kihachiro OHTA, Makoto OKI1978 年 21 巻 158 号 p. 1258-1263
発行日: 1978年
公開日: 2008/02/15
ジャーナル フリーAt the first stage of this study, on a simplified model with no vent and one output port closed, some numerical computations and visualized experiments have been performed at Reynolds numbers up to 2000 in various flow rate ratios of control flow to main jet. Numerical solutions by finite difference method include an up-wind difference scheme for the convection term of a basic equation and indicate good agreement with the experimental results by hydrogen bubble method and tuft method. These investigations have made clear stream lines, equivorticity lines, velocity distribution, separation point, reattachment point and thickness of attached vortex in the present model.抄録全体を表示PDF形式でダウンロード (647K) -
Yuji TOMITA, Tomosada JOTAKI1978 年 21 巻 158 号 p. 1264-1267
発行日: 1978年
公開日: 2008/02/15
ジャーナル フリーA linear stability problem for Couette flow between rotating concentric cylinders of a dilute polymer solution which exhibits reduction of turbulent friction drag is examined. The effect of the addition of polymers on the flow is considered by an elongational viscosity which is assumed constant. It is assumed that the gap is narrow and that both cylinders rotate at almost equal speed in the same direction. It is found that the critical Taylor number increases from the value for the Newtonian liquid and that the corresponding wave number reduces.抄録全体を表示PDF形式でダウンロード (501K) -
Hidesato ITO, Takashi MIYAKAWA1978 年 21 巻 158 号 p. 1268-1276
発行日: 1978年
公開日: 2008/02/15
ジャーナル フリーCalculations have been made of the pressure differential between the outside and inside curves of a 360-deg. bend flowmeter, and a theoretical formula for discharge coefficients in the case of turbulent flow was presented. Some theoretical considerations were also given to the discharge coefficients in the case of laminar flow. The discharge coefficients for five 360-deg. bend flowmeters with radius ratio in the range from 7 to 28 were measured in the Reynolds number range from 2×102 to 3×105. Empirical formulas for the discharge coefficients, which are backed by theoretical considerations and found in good agreement with experiments, were presented for both cases of laminar and turbulent flow.抄録全体を表示PDF形式でダウンロード (892K) -
Seiichi WASHIO, Tadataka KONISHI1978 年 21 巻 158 号 p. 1277-1283
発行日: 1978年
公開日: 2008/02/15
ジャーナル フリーThe impedance properties of a wave transmission line containing viscous liquid are experimentally investigated. The pulsating flow rate is measured with an accelerometer connected to a light piston placed at the inlet of a pipe with a closed end. There is good agreement between the experimental results and the theoretical ones given by the axisymmetrical viscous wave equations. Another wave equations considering also a radial pressure gradient are introduced to explain the transition of velocity profile in front of the piston. As the result it is thought the the influence of the piston interposed in oil column decreases rapidly with an increasing distance from it, and is negligible for the present purpose. According to the equations proposed here, dynamic pressure and flow rate in a circular liquid pipe are expressed in infinite series with respect to eigenvalues. A numerical procedure to obtain the eigenvalues for oscillation is developed, too.抄録全体を表示PDF形式でダウンロード (702K) -
Nobuyoshi MORITA, Takeshi FURUHASHI, Masayuki MATSURA1978 年 21 巻 158 号 p. 1284-1291
発行日: 1978年
公開日: 2008/02/15
ジャーナル フリーA method employing the continuous contact model which was described in the 1st report is adapted for analysing the dynamic motion of a crank-lever mechanism with a clearance at the joint of crank and coupler. Results of numerical calculation of link motions and the input torque are shown. Comparison is made between theory and experimental results for the input torque, and it is shown that this model is sufficient for solving the dynamic motions of the mechanism with a clearance. Further, the effects of the amount of clearance, driving speed, and mass ratio of the coupler and the lever of the input torque are discussed for the design of a linkage.抄録全体を表示PDF形式でダウンロード (659K) -
Nobuyoshi MORITA, Takeshi FURUHASHI, Masayuki MATSUURA1978 年 21 巻 158 号 p. 1292-1298
発行日: 1978年
公開日: 2008/02/15
ジャーナル フリーThe method employing the continuous contact model is adapted for analysing the dynamics of the crank-lever mechanism with a clearance at the joint of coupler and lever. Results of numerical calculation of the link motions, the input torque and experimental results for the input torque are shown. They are compaired with the results on the mechanism with a clearance at the joint of crank and coupler in the 2nd report, and the effects of the amount of the variations of clearance, driving speed and mass ratio of coupler and lever on the input torque are discussed for the design of linkage.抄録全体を表示PDF形式でダウンロード (636K) -
Takeshi FURUHASHI, Nobuyoshi MORITA, Masayuki MATSUURA1978 年 21 巻 158 号 p. 1299-1305
発行日: 1978年
公開日: 2008/02/15
ジャーナル フリーThe forces acting at the joints of a crank-lever mechanism with a clearance at turning pairs are found by a straightforward solution of the equations of motion of the moving links. In each case of the mechanism with a clearance at the joint of crank-coupler or coupler-lever, the forces acting at the joints are calculated by the kinematic analysis in 2nd and 3rd reports. The following points are discussed: (1) a shaking force acting on the frame, (2) effects of the amounts of clearance, driving speed and mass of link on the forces acting at the joints, and (3) comparison of the direction of a force acting at the joint with the contact angle and the limits of applicability of the continuous contact model.抄録全体を表示PDF形式でダウンロード (648K) -
Akio NAGAMATSU, Masaho FUKUDA1978 年 21 巻 158 号 p. 1306-1310
発行日: 1978年
公開日: 2008/02/15
ジャーナル フリーThe sound noise generated from ball bearings rotating vertically at high speeds till 900 rps is measured and analyzed under many kinds of supports of the outer races, for instance, with the steel housings and with the plastics. The results are compared with those of the usual researches concerning sound noise at the low speed rotation of about 50 rps, and the change of noise due to the change of the supporting condition of the outer races is studied. At the low speed rotation, the total sound pressure level is lower under the soft support with the plastics than under the hard support with the steel housings, but the state is reversed at the high speed rotation. The main components of frequencies are composed of integral multiples of the rotating frequency as well as the natural frequencies of the outer races, the retainer, the rotor and other parts of the rotating instrument.抄録全体を表示PDF形式でダウンロード (781K) -
Chotaro NARUSE, Shoji HAIZUKA1978 年 21 巻 158 号 p. 1311-1317
発行日: 1978年
公開日: 2008/02/15
ジャーナル フリーLimiting Load for scoring and coefficient of friction, in the case of carburized and hardened steel, under various contact conditions of simultaneous rolling and sliding, were studied. Their characteristics were tested, changing widely the lubricating oils, sliding velocity and specific sliding. We got an approximate formula about the limiting load for scoring as a function of sliding velocity and specific sliding. The critical temperature rise by Blok was also discussed with our experimental results. Moreover we have compared the limiting load for scoring by means of FZG spur gear test and 4 ball test with our experimental results by means of our disk-machine.抄録全体を表示PDF形式でダウンロード (773K)
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