Product Code:SAE ARP4754
Title:Certification Considerations for Highly-Integrated Or Complex Aircraft Systems
Issuing Committee: S-18, Aircraft And Sys Dev And Safety Assessment Committee
Scope:This document discusses the certification aspects of highly-integrated or complex systems installed on aircraft, taking into account the overall aircraft operating environment and functions. The term "highly-integrated" refers to systems that perform or contribute to multiple aircraft-level functions. The term "complex" refers to systems whose safety cannot be shown solely by test and whose logic is difficult to comprehend without the aid of analytical tools.【英文标准名称】:TestMethodforMeasuringtheDynamicMechanicalPropertiesofPlasticsinTension(08.03)
【原文标准名称】:塑料动态拉伸机械性能试验方法
【标准号】:ANSI/ASTMD5026-2001
【标准状态】:现行
【国别】:美国
【发布日期】:2001
【实施或试行日期】:2001-09-25
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:抗拉试验;流动性;塑料;热固性聚合物;试验
【英文主题词】:plastics;testing;abilitiestoflow;thermosettingpolymers;tensiletesting
【摘要】:Thistestmethodcoverstheuseofdynamicmechanicalinstrumentationforgatheringandreportingthevisco-elasticpropertiesofthermoplasticandthermosettingresinsandcompositesystemsintheformofrectangularspecimensmoldeddirectlyorcutfromsheets,plates,ormoldedshapes.Thetensiledatageneratedmaybeusedtoidentifythethermomechanicalpropertiesofaplasticsmaterialorcompositionusingavarietyofdynamicmechanicalinstruments.Thistestmethodisintendedtoprovidemeansfordeterminingthemodulusasafunctionoftemperatureofawidevarietyofplasticsmaterialsusingnonresonantforced-vibrationtechniques,inaccordancewithPracticeD4065.Plotsoftheelastic(storage);loss(viscous);andcomplexmoduliandtandeltaasafunctionoffrequency,time,ortemperatureareindicativeofsignificanttransitionsinthethermomechanicalperformanceofthepolymericmaterialsystem.Thistestmethodisvalidforawiderangeoffrequencies,typicallyfrom0.01to100Hz.Apparentdiscrepanciesmayariseinresultsobtainedunderdifferingexperimentalconditions.Theseapparentdifferencesfromresultsobservedinanotherstudycanusuallybereconciled,withoutchangingtheobserveddata,byreportinginfull(asdescribedinthistestmethod)theconditionsunderwhichthedatawereobtained.Duetopossibleinstrumentationcompliance,thedatageneratedareintendedtoindicaterelativeandnotnecessarilyabsolutepropertyvalues.Testdataobtainedbythistestmethodisrelevantandappropriateforuseinengineeringdesign.ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note1-ThereisnosimilarorequivalentISOstandard.
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:
【正文语种】:英语