Parameteridentificationofthefailurestrainof

laserscaledpolypropylenematerial

WANGXi-jun; ZONGZhi; NIEChun; MUTSUOFuji

doi:10.11883/1001-1455(2012)05-0457-06

Volume 32 Issue 5

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WANGXi-jun, ZONGZhi, NIEChun, MUTSUOFuji. Parameteridentificationofthefailurestrainoflaserscaledpolypropylenematerial[J]. Explosion And Shock Waves, 2012, 32(5): 457-462. doi: 10.11883/1001-1455(2012)05-0457-06

Citation:

WANGXi-jun, ZONGZhi, NIEChun, MUTSUOFuji. Parameteridentificationofthefailurestrainof laserscaledpolypropylenematerial[J]. Explosion And Shock Waves, 2012, 32(5): 457-462. doi: 10.11883/1001-1455(2012)05-0457-06

Citation:

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Parameteridentificationofthefailurestrainof laserscaledpolypropylenematerial

doi: 10.11883/1001-1455(2012)05-0457-06

1.
StateKeyLaboratoryofStructuralAnalysisforIndustrialEquipment,
2.
FacultyofVehicleEngineeringand Mechanics,DalianUniversityofTechnology,
3.
Dalian116024,Liaoning,China;
4.
Schoolof NavalArchitectureEngineering,FacultyofVehicleEngineeringand Mechanics,

Funds:

NationalBasicResearchProgramofChina(973Program)(2010CB832704)

Publish Date: 2012-09-25

Abstract

Abstract

Polypropylene(PP)plasticwasreprocessedbylaserfacilitytodecreasethelocalstrengtharoundthescoredline. Theweakenstrengthisnecessarytoevaluatetomeetengineeringrequirement. Inthepresentresearch,thecommercialfiniteelementsoftwareLS-DYNA wasappliedtoanalyze PPsfailurestrengthunderimpact.IntheFE model,theequivalentsectionmethodwasappliedto approximatethetinyorificesformedbylaser.Meanwhile,accountforrate-dependentofPPmaterial, sixstress-straincurveswithdifferentstrainrateweregiventodescribethematerial.Thefailurestrain wasdeterminedthroughparameteridentificationapproach.Comparedwithaseriesofexperiments, thenumericalresultswereconfirmed.Byrangeanalysisofnumericalresults,itwasfoundthatthe failurestrengthincreasedwiththeincreaseofthediameterofseamlessline,anditdecreasedwiththe increaseoftheimpactingvelocity.
- solidmechanics,
- failurestrain,
- finiteelement,
- polypropyleneplastic,
- parameteridentification,
- impactexperiment