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

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Mass Velocities under Choked Flow Conditions in Two-Phase Flashing Pipe Flow 两相闪管流堵塞条件下的质量速度
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1981-12-01 DOI: 10.1243/JMES_JOUR_1981_023_056_02
D. Chisholm
{"title":"Mass Velocities under Choked Flow Conditions in Two-Phase Flashing Pipe Flow","authors":"D. Chisholm","doi":"10.1243/JMES_JOUR_1981_023_056_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1981_023_056_02","url":null,"abstract":"Equations are developed for predicting the mass velocity under choked flow conditions in two-phase pipe flow. Predictions are compared with experiment and the most widely used alternative prediction procedures.","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132055361","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
Cyclic Softening and Over-Softening of a 1 Percent Cr-Mo-V Steel at Elevated Temperature 1% Cr-Mo-V钢在高温下的循环软化和过软化
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1981-12-01 DOI: 10.1243/JMES_JOUR_1981_023_055_02
T. Gardiner
{"title":"Cyclic Softening and Over-Softening of a 1 Percent Cr-Mo-V Steel at Elevated Temperature","authors":"T. Gardiner","doi":"10.1243/JMES_JOUR_1981_023_055_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1981_023_055_02","url":null,"abstract":"Detailed results are presented of shear stress range variation during cycling of 1 per cent Cr-Mo-V test specimens within controlled total shear strain limits at 565°C. The cyclic softening induced during continuous and two-step cycling are compared. A saw-toothed pattern for the strain was maintained for each cycle giving a constant straining rate. Normal cyclic softening was found throughout the tests but another phenomenon of over-softening occurred during the two-step tests when high strain cycles took place first. A permanent history effect had been produced within the steel. This over-softening did not depend on the straining rate of the cycling or the magnitude of the initial cycle ratio. The generally accepted method of determining cyclic stress-strain curves using continuous cycling is shown to be invalid when over-softening is present.","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124893572","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
The Prediction of Gas Pressures within the Ring Packs of Large Bore Diesel Engines 大口径柴油机环包内气体压力的预测
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1981-12-01 DOI: 10.1243/JMES_JOUR_1981_023_054_02
B. Ruddy, D. Dowson, P. Economou
{"title":"The Prediction of Gas Pressures within the Ring Packs of Large Bore Diesel Engines","authors":"B. Ruddy, D. Dowson, P. Economou","doi":"10.1243/JMES_JOUR_1981_023_054_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1981_023_054_02","url":null,"abstract":"The established orifice and volume method for predicting the gas pressures between piston rings in reciprocating machines is extended to take account of the energy loss due to wall friction in the ...","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132496615","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: 28
Porous Retainers for Rolling Bearings
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1981-12-01 DOI: 10.1243/JMES_JOUR_1981_023_050_02
R. Gohar, H. So
{"title":"Porous Retainers for Rolling Bearings","authors":"R. Gohar, H. So","doi":"10.1243/JMES_JOUR_1981_023_050_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1981_023_050_02","url":null,"abstract":"A theoretical analysis is made for the lubrication of ball bearing retainers made of porous material. The results show that at low Sommerfeld reciprocals, the eccentricity ratio tends to unity with a high coefficient of friction. At a certain critical value of the reciprocal, a minimum friction occurs, thereafter followed by hydrodynamic operation. The critical value depends on the permeability parameter of the porous matrix and increases with its porosity. Experiments suggest that at low Sommerfeld reciprocals or with the oil supply coming only from the retainer pores, mixed film lubrication occurs, friction being less than that obtained theoretically. Such a lubrication regime would still allow sufficient oil to be carried by the balls to the races for their lubrication.","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131540055","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
An Interaction Effect Consideration in Cumulative Damage in Metals Due to Creep 考虑金属蠕变累积损伤的相互作用效应
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1981-12-01 DOI: 10.1243/JMES_JOUR_1981_023_052_02
T. Bui-Quoc, A. Biron
{"title":"An Interaction Effect Consideration in Cumulative Damage in Metals Due to Creep","authors":"T. Bui-Quoc, A. Biron","doi":"10.1243/JMES_JOUR_1981_023_052_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1981_023_052_02","url":null,"abstract":"An interaction effect between stresses is considered in cumulative creep damage tests with two levels to explain the deviation of the summation of time ratios from unity. With the cumulative damage concept previously suggested for the creep process, empirical relations have been established in order to take this effect into account. The parameters considered are the difference between stresses and the damaging time ratio. Essentially, this approach gives a theoretical value of the sum of time ratios greater than unity for decreasing stresses, whereas this value is smaller than unity for increasing stresses. The correlation between predictions and some published experimental results is discussed.","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"315 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131412606","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: 4
Prediction of Stall Type (Abrupt or Progressive) for a Single Compressor Rotor 单转子失速类型(突发性或渐进性)的预测
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1981-12-01 DOI: 10.1243/JMES_JOUR_1981_023_051_02
A. J. Al-Daini
{"title":"Prediction of Stall Type (Abrupt or Progressive) for a Single Compressor Rotor","authors":"A. J. Al-Daini","doi":"10.1243/JMES_JOUR_1981_023_051_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1981_023_051_02","url":null,"abstract":"The performance of four single compressor rotors in rotating stall is described. Using an earlier work, Al-Daini and Railly (1)‡, theoretical maps of performance are constructed using a blockage factor αm (related to losses) for each of the tested rotors. It is shown that these maps may be used to give a good indication of whether a single compressor rotor will experience progressive or abrupt stall.","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123717682","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
Balancing of Flexible Rotors during Operation 柔性转子在运行过程中的平衡
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1981-10-01 DOI: 10.1243/JMES_JOUR_1981_023_046_02
J. V. Vegte
{"title":"Balancing of Flexible Rotors during Operation","authors":"J. V. Vegte","doi":"10.1243/JMES_JOUR_1981_023_046_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1981_023_046_02","url":null,"abstract":"Previous theoretical and experimental work on balancing rotating systems without interrupting operation is extended to multi-disc flexible shaft systems with two balancing planes.","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122344686","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: 51
Unfolding a Curved Elastic Sheet 展开弯曲的弹性薄片
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1981-10-01 DOI: 10.1243/JMES_JOUR_1981_023_042_02
C. Wang
{"title":"Unfolding a Curved Elastic Sheet","authors":"C. Wang","doi":"10.1243/JMES_JOUR_1981_023_042_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1981_023_042_02","url":null,"abstract":"A curved elastic sheet is flattened on a rigid flat plate by vertical end forces. The problem is governed by a non-dimensional parameter, B, which signifies the relative importance of flexural rigidity to the applied force and the natural radius. The elastica equations are solved by elliptic functions, perturbation for small B, and numerical integration. Force-displacement characteristics and sheet configurations are found. The results may be applied to sandwiched leaf springs.","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115677781","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: 4
On the use of Equilibrium Axes and Body Axes in the Dynamics of a Rigid Ship 平衡轴和体轴在刚性船舶动力学中的应用
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1981-10-01 DOI: 10.1243/JMES_JOUR_1981_023_045_02
R. Bishop, W. Price
{"title":"On the use of Equilibrium Axes and Body Axes in the Dynamics of a Rigid Ship","authors":"R. Bishop, W. Price","doi":"10.1243/JMES_JOUR_1981_023_045_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1981_023_045_02","url":null,"abstract":"Although it is natural and usual to employ body axis in the theory of ship manoeuvring and directional stability, the motions concerned are performed in the ‘rigid body modes’ of hydroelasticity theory and the theory of seakeeping, in which equilibrium axes are used. The dynamics of a rigid ship can therefore be approached from two standpoints. The theory of body axes is summarized and the less familiar theory of equilibrium axes is developed in a simple way from first principles. The two approaches are then compared. The transformations that are needed to adapt hydrodynamic data for use with the two types of axes are examined. These are of considerable practical importance in view of the present scarcity of data.","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115829342","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
The Behaviour of Circular Tubes with Large Openings Subjected to Axial Compression 大开口圆管在轴向压缩下的性能
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1981-10-01 DOI: 10.1243/JMES_JOUR_1981_023_044_02
P. Montague, M. Horne
{"title":"The Behaviour of Circular Tubes with Large Openings Subjected to Axial Compression","authors":"P. Montague, M. Horne","doi":"10.1243/JMES_JOUR_1981_023_044_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1981_023_044_02","url":null,"abstract":"Circular, thin-walled, steel tubes, with elongated, non-axisymmetric openings subjected to compressive, longitudinal load are examined. Thirteen laboratory tests are described in which careful measurements were made of displacements and strains. The tested specimens were in two geometrically dissimilar groups and their modes of failure were found to be different; in one group the free edges of the openings buckled before failure of the tube and in the other group large displacements at the free edges coincided with the reducing axial stiffness of the tubes.Two theories are proposed to explain these different kinds of behaviour and their predictions compared with the experimental results.","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125181972","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: 5
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