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The steady-state creep behavior of dental amalgam 牙用汞合金的稳态蠕变行为
Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation Pub Date : 1968-07-01 DOI: 10.6028/JRES.072C.016
G. Dickson, P. Oglesby, R. Davenport
{"title":"The steady-state creep behavior of dental amalgam","authors":"G. Dickson, P. Oglesby, R. Davenport","doi":"10.6028/JRES.072C.016","DOIUrl":"https://doi.org/10.6028/JRES.072C.016","url":null,"abstract":"wh e re u is th e stress and K and In a re co ns ta nts of th e materi a l. Th e obj ect ives of t he prese nt study we re (1) to de te rmin e th e s teady-s tate creep be havior of de nta l a ma lgam over a ra nge o f te mperatures occ urin g in th e mouth , (2) to de term in e whi ch of th e stead y-s ta te c reep equ a ti ons f rom es ta bli shed th eory re presents the behav ior of de nt a l a ma lga m, a nd (3) to de termine the acti va tion e nergy of c ree p of a malgam in order to gain an in s ight into the domin ant mechani s m govern· ing the steady-s ta te c ree p of ama lga m.","PeriodicalId":367668,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1968-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124577116","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
Creep rupture properties of Ti-8Al-1Mo-1V alloy Ti-8Al-1Mo-1V合金的蠕变断裂性能
Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation Pub Date : 1968-04-01 DOI: 10.6028/JRES.072C.012
W. D. Jenkins, W. Willard
{"title":"Creep rupture properties of Ti-8Al-1Mo-1V alloy","authors":"W. D. Jenkins, W. Willard","doi":"10.6028/JRES.072C.012","DOIUrl":"https://doi.org/10.6028/JRES.072C.012","url":null,"abstract":"","PeriodicalId":367668,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1968-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122517999","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
Analysis of n-degree elliptical elastic rings of nonuniform cross section 非均匀截面n度椭圆弹性环的分析
Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation Pub Date : 1968-04-01 DOI: 10.6028/JRES.072C.010
R. A. Mitchell
{"title":"Analysis of n-degree elliptical elastic rings of nonuniform cross section","authors":"R. A. Mitchell","doi":"10.6028/JRES.072C.010","DOIUrl":"https://doi.org/10.6028/JRES.072C.010","url":null,"abstract":"Elastic ring force transduce rs (such as proving rings , load rings , ring dynamome ters, e tc.), for a wide range of load carrying capacities have most freque ntly bee n made circ ular in shape with uniform rectangular cross section. This shape has imposed limitations on the usefuln ess of this type device , particularly for higher capacities (i .e ., greater than 100,000 lbf) , du e to ove rall s ize, gross weight, limited deflection range, and size effect during heat treatm e nt. For the sa me force resisting capacity, rings of more complex shapes can be designed to have greater de fl ec tion ranges, less weight, and smaller maximum dimensions. This paper describes methods of analysis of a broad geometric class of complex shaped rings which result in improved de fl ection and weight c haracteris ti cs. Structural analysis and design optimization methods are developed for an n·degree elliptical e lastic ring with sinusoidally varyin g c ross-sec tion dimensions. The ring is analyzed as a thick c urved bar, assuming small de fl ec tions, plane strain, Winkler-Bach bending stress distribution , uniform normal stress distribution, and paraboli c shear stress distribution [IV A sequential grid co nstrained optimization method is used to search for th-e minimum weight ring design that will sati sfy the specific force capacity, deflection, and dimensional requirements of a force tran sdu cer.","PeriodicalId":367668,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1968-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133727258","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
Analysis and design of an oscilloscope deflection system with a calculable transfer function 具有可计算传递函数的示波器偏转系统的分析与设计
Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation Pub Date : 1968-04-01 DOI: 10.6028/JRES.072C.008
D. M. Stonebraker
{"title":"Analysis and design of an oscilloscope deflection system with a calculable transfer function","authors":"D. M. Stonebraker","doi":"10.6028/JRES.072C.008","DOIUrl":"https://doi.org/10.6028/JRES.072C.008","url":null,"abstract":"","PeriodicalId":367668,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1968-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123559514","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
Calculation of substitution error in barretters 阻滞器替代误差的计算
Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation Pub Date : 1968-04-01 DOI: 10.6028/JRES.072C.009
Stephen Jarvis, John W. Adams
{"title":"Calculation of substitution error in barretters","authors":"Stephen Jarvis, John W. Adams","doi":"10.6028/JRES.072C.009","DOIUrl":"https://doi.org/10.6028/JRES.072C.009","url":null,"abstract":"This paper describes a mathematical analysis for determining the value of the substitution error of a bolometer with a Wollaston-wire element (barretter). The analysis reAects all significant non linearities in the heat Aow, including some not covered before, and includes all appreciable heat transport mechanisms simultaneously. . ' The values of substitution error thus obtained, in conjunction with efficiency data obtamed by microwave techniques, will be very useful in extending power meter calibrations to frequency ranges where extremely accurate microcalorimeters are not available.","PeriodicalId":367668,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1968-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122671256","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: 8
Applications of coaxial chokes to a-c bridge circuits 同轴扼流圈在ac -c桥电路中的应用
Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation Pub Date : 1968-04-01 DOI: 10.6028/JRES.072C.011
D. Homan
{"title":"Applications of coaxial chokes to a-c bridge circuits","authors":"D. Homan","doi":"10.6028/JRES.072C.011","DOIUrl":"https://doi.org/10.6028/JRES.072C.011","url":null,"abstract":"One or more lurn s of coaxi a l cab le on a magnelic core form a coaxial c hoke which may be used to suppress unwa nted loop c urre nl s in a-c bridge c irc uil s. A re vie w of seve ra l app licaliuns of coaxial chokes to a-c bridge c irc uit s is present ed. T hese appl icat ion s in c lude s up press ing ground loop c urrent s, assurin g uniqu e de finiti on in the measure me nl o f s mall 3te rrnina l ca pac it o rs, redu cing s tray magnetic fi e ld a nd reducing voltage d ro ps in leads ca used by la rge ground ca pac itance curre nt. The re is a lso a d iscuss ion of techniques fo r grea tl y inc reas ing the e ffec tiveness of the coaxia l choke.","PeriodicalId":367668,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1968-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129570375","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: 34
MEASUREMENTS OF THE THERMAL CONDUCTIVITY AND ELECTRICAL RESISTIVITY OF PLATINUM FROM 373 TO 1373K. 在373至1373k范围内测量铂的导热性和电阻率。
Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation Pub Date : 1967-10-01 DOI: 10.6028/JRES.071C.021
M. O'Hagan, R. Heller
{"title":"MEASUREMENTS OF THE THERMAL CONDUCTIVITY AND ELECTRICAL RESISTIVITY OF PLATINUM FROM 373 TO 1373K.","authors":"M. O'Hagan, R. Heller","doi":"10.6028/JRES.071C.021","DOIUrl":"https://doi.org/10.6028/JRES.071C.021","url":null,"abstract":"Abstract : Measurements were made of the thermal conductivity and the electrical resistivity of commercial grade platinum (99.987 per cent pure) in the temperature range 373 to 1373K. The measurements were made with a view to providing accurate data on the thermal conductivity of platinum to serve as a basis for establishing platinum as a thermal conductivity standard reference material. The data obtained agree within experimental error and show the thermal conductivity of platinum to be a smoothly increasing function of temperature in the measured range. The data are considered to be accurate to better than one percent.","PeriodicalId":367668,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115544986","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: 14
Design of a new Kossel pattern generator 新型科塞尔图案发生器的设计
Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation Pub Date : 1967-10-01 DOI: 10.6028/JRES.071C.025
D. Vieth, H. Yakowitz
{"title":"Design of a new Kossel pattern generator","authors":"D. Vieth, H. Yakowitz","doi":"10.6028/JRES.071C.025","DOIUrl":"https://doi.org/10.6028/JRES.071C.025","url":null,"abstract":". A Kossel patte~n generator, designed and built at the National Bureau of Standards , is described In detaIl. The Unit IS modular and consis ts of an electron beam column, vac uum system, light micro· ssope, film cas selle, and Kossel camera. The camera component includes microgoniometric capa· blhtles . The Kossel x-ray techniqu e enables the investigator to obtain lattice spacing data precise to two or three parts p er million, and orientation of crystals to 0.1 0 of arc. The Kossel pallern gen· e rator descnbed permIts data for such determinations to be obtained quickly and precisely.","PeriodicalId":367668,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation","volume":"540 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124535878","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
Thermal conductivity and electrical resistivity of Armco iron Armco铁的导热性和电阻率
Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation Pub Date : 1967-10-01 DOI: 10.6028/JRES.071C.022
T. W. Watson, D. Flynn, H. E. Robinson
{"title":"Thermal conductivity and electrical resistivity of Armco iron","authors":"T. W. Watson, D. Flynn, H. E. Robinson","doi":"10.6028/JRES.071C.022","DOIUrl":"https://doi.org/10.6028/JRES.071C.022","url":null,"abstract":"","PeriodicalId":367668,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127246822","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
Heat flow in a right circular cylinder with internal heat generation - applications to the determination of thermal conductivity 带内部热产生的右圆柱体内的热流。热导率测定的应用
Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation Pub Date : 1967-10-01 DOI: 10.6028/JRES.071C.023
D. Flynn
{"title":"Heat flow in a right circular cylinder with internal heat generation - applications to the determination of thermal conductivity","authors":"D. Flynn","doi":"10.6028/JRES.071C.023","DOIUrl":"https://doi.org/10.6028/JRES.071C.023","url":null,"abstract":"Exp ress ion s a re d e ve lo pe d whic h permit ca lc ul a ti o n of the te m pe rature ·de pe nde nt the rma l con· duc ti vit y uf a cy lin d ri ca l s pec ime n in whic h hea t is ge ne rat ed inte rna ll y, e .g., by radi oa ctive deca y. Th e in for ma ti o n needed co ns ist s of th e e xpe rim e nta ll y de te rmi ne d te m pe rature di stributions on the surfaces o f th e cy linde r, th e hea t fl ow through a centra l c irc ul a r a rea a t one e nd of the cylinde r, and th e rate of int e rn a l hea t ge ne ra ti o n (whic h in ge ne ra l ma y be pos ition·d e pe ndent ). N ume ri c a l coe ffi c ient s arc t abul a ted fo r th e case o f unifo rm int e rn a l heat ge ne ration . T he ap pli cati on of thi s c a lcul a tion pro· cedure tu publi s hed me thod s of th e rm a l condu c ti vit y de te rmin at ion is s hown a nd an examp le is give n.","PeriodicalId":367668,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125166210","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
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