PV 3307-EN-2019 弹性零件塑性和弹性变形

GroupstandardPV3307

Issue2019-03

Class.No.:55161

Descriptors:compressivestress,deformability,deformationbehavior,elastic,elasticdeformation,elastomer,plastic,plasticdeformation

ElastomerComponents

PlasticandElasticDeformability

Previousissues

PV3307:1968-06,1971-11,1992-08,1995-06,1998-05,1999-02,2004-08

Changes

ThefollowingchangeshavebeenmadetoPV3307:2004-08:

–

Section"Thicknessgage"3.1.1

revised

–

Section"Heat

3.1.2source"added

–

Section"Specimens"

3.1.3revised

–

Section"Testprocedure"3.2

revised

–

Section4"Applicable

documents"added

–

AppendixA"Detail

drawings":Sectiontitleadded

–Standardedited

1Scope

ThisTestSpecification(PV)describesatestmethodfordeterminingplasticandelasticdeformationbehaviorunderdefinedtestconditions.Itmustbeusedforelastomerpartsthatareexposedtoacompressivestressinthefield.

2Designation

Testduration,testtemperature,andlimit-valuerequirementsareadaptedtotherespectiverequire-ments.Example:

PlasticdeformationasperPV3307,46hat70°C,≤60%

Alwaysusethelatestversionofthisstandard.

Thiselectronicallygeneratedstandardisauthenticandvalidwithoutsignature.Acommaisusedasthedecimalsign.TheEnglishtranslationisbelievedtobeaccurate.Incaseofdiscrepancies,theGermanversioncontrols.

Page1of6

Technicalresponsibility

GQL-P/2Peter

Schulz

Tel.:+495361924365

GQL-P/2Dr.Lutz

Wohlfarth

Tel.:+495361913511

GQL-PDenisEschwey

TheStandardsdepartment

K-ILI/5Stefanie

Peyer

K-ILI

Tel.:+495361941184UweWiesner

Allrightsreserved.NopartofthisdocumentmaybeprovidedtothirdpartiesorreproducedwithoutthepriorconsentofoneoftheVolkswagenGroup’sStandardsdepartments.

©VolkswagenAktiengesellschaftVWNORM-2018-11

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PV3307:2019-03

3

3.1

3.1.1

Testing

Testequipment

Thicknessgage

See

figure1

and

figure2

.

Readingaccuracy:0,01mm

Downwardpressure(preload):0,45Nto0,75N

Testtooldiameter:2,5mm

Othertesttools,especiallythosethatdeviatefromthatdescribedabove,e.g.,inshapeand/ordi-ameter,requireagreementwiththeappropriatedepartment(e.g.,ballforspecimensfromhoses).Thismustbenotedinthetestreportaccordingly.

Itmustbeensuredthatthetesttoolisplacedpreciselyonthemeasuringpointformeasurements

afterheataging.

Figure1–Thicknessgage

Legend

1Testtool

2DUT

Figure2–Detailofthethicknessgage

from

figure1

3.1.2Heatsource

Aforced-airovenasper

DIN53508

isusedastheheatsource.

3.1.3Specimens

Diameterapprox.16mm,thicknesspreferably2,0mm.Otherspecimenthicknessesandgeome-triesmaybeusedifagreeduponwiththeappropriatedepartment.

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3.2Testprocedure

Compressthefinished-partspecimensortestsheetsto50%oftheiroriginalthicknessinacentralareaaccordingtothetestsetupdiagram(see

figure3

).Selectanappropriatetestagentthatthepertinentproductwillbeexposedtointypicalapplications.Agethespecimensaccordingly,forex-ample,totestatroomtemperature(23±2)°C,elevatedtemperatures,andtotestfortheeffectsoffluids.Thestandardtestdurationsare22h,46h,and94h.

Topreventthespecimenfromstickingtothetesttool,thespecimenmaybedustedwithtalc.Othermethodsrequiretheagreementoftheappropriatedepartment.

Specimensexposedtoheatagingmustbeacclimatizedat(23±2)°Cbeforethepressureisre-lieved.

Measurethespecimens5safterthepressureisrelieved.

Figure3-Testsetupdiagram

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PV3307:2019-03

3.3Testjig

See

figure4

and

figureA.1

.

Legend

1Loadscrew

2M6adjustingbolt

3M6locknut

4Pressureplate

5Compressionspring;outerdiameterØ=8mm;innerdiameterØ=6mm;

length=16,5mm;springrate=6,5N/mm;springforce=37N;totalnumberofturns=5,5

6Baseplate

Figure4–"Plasticdeformation"testjig

Material:Stainlesssteel(forcompressionspring:springsteel);tolerance±0,25

3.4Evaluation

Calculatetheplasticdeformationusing

formula(1)

.

×100=plasticdeformation(%)(1)

Legend

h0Startingthickness

h1Thicknesscompressedby50%

h2Thicknessafterpressureisrelieved

Evaluatethetestresultsbycalculatingthearithmeticmeanfromatleastthreevalues.

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4Applicabledocuments

Thefollowingdocumentscitedarenecessarytotheap