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1、EffectofProcessingConditionsandMaterialPropertiesontheDebondFractureToughnessofFoam-CoreSandwichComposites:ProcessModelDevelopment*DeepakSrinivasaguptaandBabuJosephDepartmentofChemicalEngineering,WashingtonUniversity,SaintLouis,MO63130PrasunMajumdarandHassanMahfuzTuskegeeUnive
2、rsity’sCenterforAdvancedMaterials(T-CAM),Tuskegee,AL36088Keywords:Co-injectionResinTransferMolding,VacuumAssistedResinInfusionMolding,SandwichComposites,CompositesProcessing,ProcessModeling,ProcessOptimization(MS#CMA/02/031/SGA)RevisedSubmissiontoCompositesPartA:AppliedScience
3、andManufacturingBasedonapresentationgivenatthe2001AIChEAnnualMeeting,Reno,NV,Nov.5-9D.Srinivasagupta(deepak@che.wustl.edu)andB.Joseph(joseph@eng.usf.edu)arenowwiththeDepartmentofChemicalEngineering,UniversityofSouthFlorida,Tampa,FL.*Correspondingauthor.Mailingaddress:Departmen
4、tofChemicalEngineering,UniversityofSouthFlorida,4202E.FowlerAve.,ENB118,Tampa,FL33620.Phone:(813)974-0692.Fax:(813)974-3651.AbstractVacuumassistedresininfusionmolding(VARIM)isarecentlydevelopedpromisinglow-costbatchprocessthathasbeenappliedtothemanufactureoflarge-sizedcomposit
5、eparts.Theprocesshasbeensuccessfullyextendedtotheconstructionoffoam-coresandwichcompositesbyintroducingaco-injectionresintransfermolding(CIRTM)technique.IntheCIRTMprocess,thesandwichismanufacturedinoneintegralstepandthebondingbetweentheskinandthecoreisdevelopedduringthecurepro
6、cess.Thestructuralperformanceandreliabilityofthesesandwichesaredependentonthestrengthofthecore-skinbonding.Processingconditionsandmaterialparameterssuchaspermeabilityoffibersandfoam;viscosityandcurekineticsoftheresin;andresininfusionpressureandtemperatureallaffectthecure.Arigo
7、rous3-Dnon-isothermalprocessingmodelwasdevelopedforthefirsttimetoassistinthedesignandoptimizationoftheCIRTMprocessforsandwichconstruction.Asimplified1-Disothermalmodelwasalsodevelopedforreal-timecontrolandcomparedwiththefull-blownmodel.Theeffectsofvariousprocessingparameterson
8、thecore-skinbondingstrengthwereinvestigatedwithparametricstud
