基本信息
| 标准名称： | 施工机械安全技术操作规程 第九册 缆索起重机 |
| 中标分类： |
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| 发布部门： | 施工机械安全技术 |
| 发布日期： | 1981-08-06 |
| 实施日期： | 1981-08-06 |
| 首发日期： | |
| 作废日期： | |
| 出版社： | 中国电力出版社 |
| 出版日期： | 1981-08-06 |
| 页数： | 13页 |
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【英文标准名称】:Reinforcedplastics-Determinationofthein-planeshearmodulusbytheplatetwistmethod
【原文标准名称】:增强式塑料制品.采用板扭法对面内剪切模量的测定
【标准号】:BSISO15310-2000
【标准状态】:作废
【国别】:英国
【发布日期】:2000-02-15
【实施或试行日期】:2000-02-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:精密度;塑料;复合材料;剪应力;试验条件;试样制备;再现性;高聚物;加强材料;抗拉试验;剪切试验;试样;增强的材料;纤维;叠层板材;试验设备
【英文主题词】:Amplification;Definition;Definitions;Determination;Fibrereinforced;Flexibility;Plastics;Plates;Reinforcedplastics;Reinforcement;Rotatable;Shearmodulus;Shearstrength;Sheartesting;Sheartests;Speedoftesting;Testequipment;Testspecimens;Testing
【摘要】:ThisInternationalStandardspecifiesamethodfordeterminingthein-planeshearmodulus(G12)offibre-reinforcedplasticcompositesusingastandardplatespecimen.Whenappliedtoisotropicmaterials,theshearmodulusmeasuredisindependentofdirection.Themethodisusedtodeterminetheshearmodulusofthetestspecimensbutnottodeterminetheshearstrength.Itappliestoaplatesupportedontwopointsononediagonalandloadedontheotherdiagonalbythesimultaneousmovementoftwoloadingpointsattachedtoacross-beam.Themethodissuitableforusewithfibre-reinforcedplasticcompositeswithboththermosetandthermoplasticmatrices.Duetothesheardeformationbeingappliedunderflexuralconditions,forlaminatedmaterialswithdifferentfibreformatsand/ordifferentorientations,thelayersofmaterialmustbewelldistributedacrossthesectionsothatitisapproximately"homogeneous"inthethrough-thicknessdirection.Theprincipalmaterialaxes,ifpresent,mustbeorientatednormaltotheplateedges(see3.8).NOTEThismethodcanbeappliedtounreinforcedpolymersandothermaterials(e.g.metals,ceramicsandmetal-orceramic-matrixcomposites).Formaterialfabricatedusingunidirectionalplies,theshearmodulusobtainedusingamultidirectionalspecimen(i.e.0°/90°/±45°)isnotthesameasthatobtainedforunidirectionalorcross-ply(0°/90°)material.Themethodisperformedusingspecimenswhichmaybemouldedtothechosendimensions,machinedfromtestplatesormachinedfromflatareasofproducts.Themethodspecifiespreferreddimensionsforthespecimen.Testswhicharecarriedoutonspecimensofotherdimensions,oronspecimenswhicharepreparedunderdifferentconditions,mayproduceresultswhicharenotcomparable.Otherfactors,suchasthespeedoftestingandtheconditioningofthespecimens,caninfluencetheresults.Consequently,whencomparativedataarerequired,thesefactorsmustbecarefullycontrolledandrecorded.NOTEThestress-strainresponseinshearisverynon-linearathigherstrainlevels.Thistestmethoddeterminesthemoduluswithinalowstrainregionandisnotapplicabletohigherstrains.
【中国标准分类号】:G31
【国际标准分类号】:83_120
【页数】:18P.;A4
【正文语种】:英语