ECSS-E-ST-32-08C(31July2008).pdf

ECSS-E-ST-32-08C 31 July 2008 Space engineering Materials ECSS Secretariat ESA-ESTEC Requirements whetherornotinjurywassustainedbypersonsor propertyorotherwise;andwhetherornotlosswassustainedfrom,oraroseoutof,theresultsof,the item,oranyservicesthatmaybeprovidedbyECSS. Publishedby:ESARequirementsandStandardsDivision ESTEC, P.O. Box 299, 2200 AG Noordwijk The Netherlands Copyright: 2008 by the European Space Agency for the members of ECSS 2 ECSSEST3208C 31July2008 Change log ECSSE30Part8A 25April2000 Firstissue ECSSE30Part8BNeverissued ECSSEST3208C 31July2008 Secondissue ThefollowingisasummaryofchangesbetweenissuesAandC: Formerclause4.2missionhasbeenremovedbecauseitdidnot containednormativematerial. Thefollowingrequirementshavebeendeletedbecausetheyare alreadycoveredbymorespecificECSSstandards: o Informerclause4.3(now4.2,Functionality),Requirementson Stresscorrosionhavebeendeletedbecausetheyarenowcovered byQ70standards. o Formerclause4.4(Missionconstrains)hasbeendeletedbecauseis nowcoveredbyQ70standards. o Informedclause4.5(now4.3,Interfaces),formerrequirements passivationlayers,hightemperatureoxidationprotectivecoatings, diffusionbarriershavebeendeletedbecausetheyarenowcovered byQ70standards. o Informerclause4.6(now4.4,Joining),requirementsrelativeto adhesivebondingandfusionhavebeendeletedbecausetheyare nowcoveredbyQ70standards. o Informerclause4.7(now4.5,Design),requirementoncomposite sandwichconstructions,Aluminium,Steel,Titanium,Magnesium alloys,BerylliumandBerylliumalloys,Mercury,Refractoryalloys, Superalloys,Othermetals,Castings,Forgins,Glassandceramics, CMC,Polymers,Rubbers,Lubricants,Thermalcontrolinsulants, andOpticalmaterials,havebeendeletedbecausetheyarenow coveredbyQ70standards. o Informerclause4.8(now4.6,Verification),formerrequirements General,Mechanicalandphysicaltestmethods,andProoftesting, havebeendeletedbecausetheyarenowcoveredby ECSSEST1002,ECSSEST1003,andQ70standards. o Formerclauses4.9(Productionandmanufacture)and4.10(In service)havebeendeletedbecausetheyarenowcoveredinQ70 standards. o Formerclause4.12(Productassurance),hasbeendeletedbecause isnowcoveredbyQ20standards. 3 ECSSEST3208C 31July2008 Theremainingrequirementshavebeenrewordedforclarity,andto complywiththeECSSdraftingrules. Thefollowingrequirementshavebeenadded: o In4.2.5,arequirementtoperformacreepanalysis o In4.2.6,arequirementtoperformamicroyieldinganalysis o In4.3.9,arequirementarequirementonorganiccoatingsaspaint 4 ECSSEST3208C 31July2008 Table of contents 1 Scope.7 2 Normative references.8 3 Terms, definitions and abbreviated terms.9 3.1 Terms and definitions from other standards.9 3.2 Terms specific to the present standard .9 3.3 Abbreviated terms .10 3.4 Symbols.10 4 Requirements.11 4.1 Overview .11 4.2 Functionality .11 4.2.1 Strength.11 4.2.2 Elastic modulus .11 4.2.3 Fatigue.11 4.2.4 Fracture toughness.12 4.2.5 Creep.12 4.2.6 Micro-yielding .12 4.2.7 Coefficient of thermal expansion and coefficient of moisture expansion.13 4.2.8 Corrosion fatigue.13 4.2.9 Hydrogen embrittlement.13 4.2.10 Mechanical contact surface effects .14 4.3 Interfaces.14 4.3.1 General.14 4.3.2 Anodizing.14 4.3.3 Chemical conversion.14 4.3.4 Metallic coatings (overlay and diffusion).14 4.3.5 Hard coatings .14 4.3.6 Thermal barriers.15 4.3.7 Moisture barriers.15 5 ECSSEST3208C 31July2008 4.3.8 Coatings on CFRP.15 4.3.9 Organic coatings as paint.16 4.4 Joining (mechanical fastening).16 4.4.1 General.16 4.4.2 Bolted joints.16 4.4.3 Riveted joints.16 4.4.4 Inserts.16 4.5 Design .17 4.5.1 Metallic design allowables.17 4.5.2 Composite design allowables.17 4.6 Verification.18 4.6.1 Metallic materials.18 4.6.2 Composite materials - laminates.19 4.6.3 Test methods on metals.19 4.6.4 Test methods on composites.20 4.6.5 Non-destructive inspection (NDI).21 4.7 Data exchange .22 6 ECSSEST3208C 31July2008 1 Scope ECSSEST3208 defines the mechanical engineering requirements for materials.ThisStandardalsoencompassesthemechanicaleffectsofthenatural andinducedenvironmentstowhichmaterialsusedforspaceapplicationscan besubjected. ThisStandarddefinesrequirementsfortheestablishmentofthemechanicaland physicalpropertiesofthematerialstobeusedforspaceapplications,andthe verificationoftheserequirements. Verification includes destructive and nondestructive test methods. Quality assurance requirements for materials (e.g. procurement and control) are coveredbyECSSQST70. Thisstandardmaybetailoredforthespecificcharacteristicsandconstrainsofa spaceprojectinconformancewithECSSSST00. 7 ECSSEST3208C 31July2008 2 Normative references The following normative documents contain provisions which, through referenceinthistext,constituteprovisionsofthisECSSStandard.Fordated references,subsequentamendmentsto,orrevisionofanyofthesepublications, donotapply.However,partiestoagreementsbasedonthisECSSStandardare encouragedtoinvestigatethepossibilityofapplyingthemorerecenteditionsof thenormativedocumentsindicatedbelow.Forundatedreferences,thelatest editionofthepublicationreferredtoapplies. ECSSSST000