BS 7914-1998 透过服装织物的太阳紫外线辐射渗透试验方法

上一篇: BS EN 931-1998 靴袜制造机械.拉伸耐久试验机.安全性要求
下一篇: BS EN ISO 1666-1998 淀粉.水含量的测定.烘箱干燥法

【英文标准名称】:StandardPracticeforGravimetricMeasurementofPolymericComponentsforWearAssessment
【原文标准名称】:磨损评定用聚合物元件重力测量的标准规程
【标准号】:ASTMF2025-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:F04.22
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:评定;组件;重量分析的;重量分析;质量损失;测量;聚合材料;高聚物;修复装置;外科植入物;磨损
【英文主题词】:
【摘要】:Thispracticeusesaweight-lossmethodofweardeterminationforthepolymericcomponentsormaterialsusedinhumanjointprostheses,usingserumordemonstratedequivalentfluidforlubrication,andrunningunderaloadprofilerepresentativeoftheappropriatehumanjointapplication(1,2).4Thebasisforthisweight-lossmethodforwearmeasurementwasoriginallydeveloped(3)forpin-on-diskwearstudies(PracticeF732)andhasbeenextendedtototalhipreplacements(4,5,ISO14242x2013;2,andGuideF1714)andtofemoro-tibialkneeprostheses(6andISO14243x2013;2),andtofemoro-patellarkneeprostheses(6,7).Whilewearresultsinachangeinthephysicaldimensionsofthespecimen,itisdistinctfromdimensionalchangesduetocreeporplasticdeformation,inthatwearresultsintheremovalofmaterialintheformofpolymericdebrisparticles,causingalossinweightofthespecimen.Thispracticeformeasuringwearofthepolymericcomponentissuitableforvarioussimulatordevices.Thesetechniquescanbeusedwithmetal,ceramic,carbon,polymeric,andcompositecounterfacesbearingagainstapolymericmaterial(forexample,polyethylene,polyacetal,andsoforth).Thus,thisweight-lossmethodhasuniversalapplicationforwearstudiesofhumanjointreplacementswhichfeaturepolymericbearings.Thisweight-lossmethodhasnotbeenvalidatedfornon-polymericmaterialbearingsystems,suchasmetal-metal,carbon-carbon,orceramic-ceramic.Progressivewearofsuchrigidbearingcombinationshasgenerallybeenmonitoredusingalinear,variable-displacementtransducers,orbyotherprofilometrictechniques.1.1Thispracticedescribesalaboratorymethodusingaweight-loss(thatis,mass-loss;seeX1.4)techniqueforevaluatingthewearpropertiesofpolymericmaterialsordeviceswhicharebeingconsideredforuseasbearingsurfacesofhumanjointreplacementprostheses,orboth.Thetestspecimensareevaluatedinadeviceintendedtosimulatethetribologicalconditionsencounteredinthehumanjoint;forexample,useofafluidsuchasbovineserum,orequivalentpseudosynovialfluidshowntosimulatesimilarwearmechanismsanddebrisgenerationasfoundinvivo.
【中国标准分类号】:J43
【国际标准分类号】:11_040_40
【页数】:6P.;A4
【正文语种】:


MIL-STD-1320-272, MILITARY STANDARD, TRUCKLOADING GUIDED MISSILE LAUNCHER (GML) FOR ROLLING AIRFRAME MISSILE SYSTEM (RAM) ON TRANSPORTATION SKID, DWG# 6660272 (28 JUN 1993) ., This document gives detailed instructions for truckloading the guided missile launcher (GML) for the rolling airframe missile system (RAM) on tis transportation skid.