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Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)最新文献

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Pressure Distribution between Closely Contacting Surfaces 紧密接触面之间的压力分布
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1980-10-01 DOI: 10.1243/JMES_JOUR_1980_022_047_02
A. Mostofi, R. Gohar
{"title":"Pressure Distribution between Closely Contacting Surfaces","authors":"A. Mostofi, R. Gohar","doi":"10.1243/JMES_JOUR_1980_022_047_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1980_022_047_02","url":null,"abstract":"The pressure distribution, contact arc extent, and deflection are determined for the elastic contact of a long roller and a cylindrical hole in an infinite body. It is shown that these variables depend on the degree of conformity of the two bodies and that Hertz's theory should not be used when the arc dimensions are of the same order as the radii of curvature, as its assumptions are violated. When the hole circumference available is reduced, pressure discontinuities can occur where the arc terminates. The results of the analysis have application in the design of some engineering components, such as complete and partial arc bearings and Novikov gears, where a knowledge of the magnitude and distribution of the contact stress is important.","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124441747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Optimization of a Follower Train for a Two Degree of Freedom Cam 二自由度凸轮从动件列车的优化
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1980-10-01 DOI: 10.1243/JMES_JOUR_1980_022_048_02
C. K. C. Jaini, A. C. Rao
{"title":"Optimization of a Follower Train for a Two Degree of Freedom Cam","authors":"C. K. C. Jaini, A. C. Rao","doi":"10.1243/JMES_JOUR_1980_022_048_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1980_022_048_02","url":null,"abstract":"Contributions intended for publication as Research Notes should preferably be limited in length to 1000 words and two illustrations, and should be addressed to the Manuscript Section, The Institution of Mechanical Engineers, 1 Birdcage Walk, Westminster, London SW1H 9JJ","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121997946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Natural Transition of Boundary Layers—The Effects of Turbulence, Pressure Gradient, and Flow History 边界层的自然过渡——湍流、压力梯度和流动历史的影响
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1980-10-01 DOI: 10.1243/JMES_JOUR_1980_022_043_02
B. J. Abu-Ghannam, R. Shaw
{"title":"Natural Transition of Boundary Layers—The Effects of Turbulence, Pressure Gradient, and Flow History","authors":"B. J. Abu-Ghannam, R. Shaw","doi":"10.1243/JMES_JOUR_1980_022_043_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1980_022_043_02","url":null,"abstract":"Natural transition of boundary layers is investigated for a flat plate in a low-speed wind tunnel with free-stream turbulence intensities ranging from 0.3 to 5 per cent, and with pressure-gradient ...","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123423568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 755
Dynamics of Gyropendulum for Small Angles 小角度回旋摆动力学
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1980-10-01 DOI: 10.1243/JMES_JOUR_1980_022_049_02
V. Krishnan
{"title":"Dynamics of Gyropendulum for Small Angles","authors":"V. Krishnan","doi":"10.1243/JMES_JOUR_1980_022_049_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1980_022_049_02","url":null,"abstract":"It was shown in (1)‡ that at a given angle of inclination, the gyropendulum may perform steady precession Ω1 or Ω2 and any small disturbance will result in the subsequent motion consisting of precession and nutation, the corresponding nutational frequency being Ω1 or Ω2 respectively. For small angles, Ω1 and Ω2 represent the natural frequencies of the system.","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"2019 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114926577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Interaction and Wall Corrections for the Slow Motion of Two Fluid or Solid Particles Parallel to the Axis of a Circular Cylinder through a Viscous Fluid 平行于圆柱体轴线的两个流体或固体颗粒通过粘性流体缓慢运动的相互作用和壁面修正
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1980-10-01 DOI: 10.1243/JMES_JOUR_1980_022_046_02
T. Greenstein
{"title":"Interaction and Wall Corrections for the Slow Motion of Two Fluid or Solid Particles Parallel to the Axis of a Circular Cylinder through a Viscous Fluid","authors":"T. Greenstein","doi":"10.1243/JMES_JOUR_1980_022_046_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1980_022_046_02","url":null,"abstract":"Numerical values are provided which enable the drag force on the reference spherical fluid or solid particle, and the torque on the reference spherical solid particle, to be computed for the particular case when two spherical particles move in a direction parallel to their line of centres parallel to the axis of a circular cylinder. Results for this motion are also expressed in terms of the ratio of drag forces experienced by (1) the particle of arbitrary shape in a bounded, two particle system, and the particle in an unbounded, two particle system, and (2) the particle in a bounded, two particle system, and the particle moving alone with the same speed and orientation in the same, but unbounded, fluid. The computation furnishes the interaction and wall corrections correctly to the first-order in the ratios of characteristic particle dimension to characteristic distance of the particle from both another particle and from the cylinder wall.The axisymmetric problem was extended to the more general case wher...","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"232 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123256359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
The Angle of Fold and the Plastic Work Done in the Folding of Developable Flat Sheets of Metal 可展金属平板折叠的折角与塑性加工
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1980-10-01 DOI: 10.1243/JMES_JOUR_1980_022_045_02
W. Johnson, Tongxi Yu
{"title":"The Angle of Fold and the Plastic Work Done in the Folding of Developable Flat Sheets of Metal","authors":"W. Johnson, Tongxi Yu","doi":"10.1243/JMES_JOUR_1980_022_045_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1980_022_045_02","url":null,"abstract":"Under the condition of inextensibility, an initially flat sheet of metal can be folded along straight lines or a curved line to produce various surfaces. The angle of fold and the plastic work done in folding along a line are examined for a series of cases, such as folding-up into a prism and a frustum, folding on a cylinder along a circular arc, and more generally, folding on a developed surface along an arbitrary curved line. Some numerical results are given.","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123484207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Some Implications of Dundurs' Theorem for Thermoelastic Contact and Crack Problems 邓都士定理在热弹性接触与裂纹问题中的若干意义
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1980-10-01 DOI: 10.1243/JMES_JOUR_1980_022_044_02
James Barber
{"title":"Some Implications of Dundurs' Theorem for Thermoelastic Contact and Crack Problems","authors":"James Barber","doi":"10.1243/JMES_JOUR_1980_022_044_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1980_022_044_02","url":null,"abstract":"It is well known that a simply-connected isotropic elastic body in a state of plane strain and with traction-free boundaries remains free of stress if it is subject to steady-state heat conduction. A recent theorem due to Dundurs shows that in this state the curvature of any initially straight line element is proportional to the heat flux across the line element.A closely related three dimensional result is proved for the sum of the principal curvatures of planes parallel to the faces of an infinite thick plate.These results have certain implications for thermoelastic crack and contact problems. For example: (i) thermal distortion has no effect on the contact pressure distribution at an insulated interface or at an interface between two similar materials, (ii) the thermal stress in a cracked solid depends on the temperature field only through the value of a certain constant related to the average temperature difference across the crack, (iii) steady-state heat flow induces no stresses in an axisymmetric t...","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117196578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Choking Effects in the Blade Rows of Turbomachines 涡轮机械叶片排中的呛流效应
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1980-08-01 DOI: 10.1243/JMES_JOUR_1980_022_034_02
J. Horlock
{"title":"Choking Effects in the Blade Rows of Turbomachines","authors":"J. Horlock","doi":"10.1243/JMES_JOUR_1980_022_034_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1980_022_034_02","url":null,"abstract":"Three-dimensional flows through cascades of blades are studied, the blading being fully choked internally. Initially the two-dimensional flow through a ‘zero stagger, zero camber’ blade row, with subsonic entry and exit flow, is described. The radial flows are produced by radial variations in throat area, or by a variety of entry shear flows. Subsequently, the analysis is developed to describe similar fully choked flows through staggered blade rows, particularly the first rotating row of a transonic compressor.","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131937675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
The Turbulent Flow of Two-Phase Mixtures in Horizontal Pipes at Low Reynolds Number 两相混合物在低雷诺数水平管内的湍流流动
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1980-08-01 DOI: 10.1243/JMES_JOUR_1980_022_038_02
D. Chisholm
{"title":"The Turbulent Flow of Two-Phase Mixtures in Horizontal Pipes at Low Reynolds Number","authors":"D. Chisholm","doi":"10.1243/JMES_JOUR_1980_022_038_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1980_022_038_02","url":null,"abstract":"Contributions intended for publication as Research Notes should preferably be limited in length to 1000 words and two illustrations, and should be addressed to the Manuscript Section, The Institution of Mechanical Engineers, 1 Birdcage Walk, Westminster, London SW1H 9JJ","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121091276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Elastic, Finite Deflection and Strain Rate Effects in a Mode Approximation Technique for Plastic Deformation of Pulse Loaded Structures: 脉冲加载结构塑性变形模态近似技术中的弹性、有限挠度和应变率效应
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1980-08-01 DOI: 10.1243/JMES_JOUR_1980_022_037_02
P. Symonds
{"title":"Elastic, Finite Deflection and Strain Rate Effects in a Mode Approximation Technique for Plastic Deformation of Pulse Loaded Structures:","authors":"P. Symonds","doi":"10.1243/JMES_JOUR_1980_022_037_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1980_022_037_02","url":null,"abstract":"A general scheme is proposed for including effects of elastic deformation, finite geometry changes, and strain rate sensitivity in a simple approximate scheme for estimating maximum transient and permanent deformations in structures subjected to load pulses of high intensity. The method is applied here to fully clamped beams of mild steel subjected to explosive loading. Comparisons are made between estimates from the present method and test results, as well as with estimates by various rigid-plastic methods and (to a limited extent) with results from numerical methods.","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133029791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 41
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