Theeffectsofstrainrateonthedynamicresponseandabnormalbehavior

ofsteelbeamsunderpulseloading

XI Feng; ZHANG Yun

doi:10.11883/1001-1455(2012)01-0034-09

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XI Feng, ZHANG Yun. Theeffectsofstrainrateonthedynamicresponseandabnormalbehaviorofsteelbeamsunderpulseloading[J]. Explosion And Shock Waves, 2012, 32(1): 34-42. doi: 10.11883/1001-1455(2012)01-0034-09

Citation:

XI Feng, ZHANG Yun. Theeffectsofstrainrateonthedynamicresponseandabnormalbehavior ofsteelbeamsunderpulseloading[J]. Explosion And Shock Waves, 2012, 32(1): 34-42. doi: 10.11883/1001-1455(2012)01-0034-09

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Theeffectsofstrainrateonthedynamicresponseandabnormalbehavior ofsteelbeamsunderpulseloading

doi: 10.11883/1001-1455(2012)01-0034-09

XI Feng,
ZHANG Yun

1.
SchoolofCivilEngineering,ShandongJianzhuUniversity,Jinan250101,Shandong,China

Funds:

NationalNaturalScienceFoundationofChina(10872117)

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Corresponding author: XI Feng
Publish Date: 2012-01-25

Abstract

Abstract

Inordertobetterunderstandthedynamicbehaviorofratesensitivematerialandstructure, acomputationalmodelforthedynamicresponseanalysisofamildsteelbeamsubjectedtosquare pulseloadingispresented,whichisderivedthroughdiscretizingdirectlytheLeefunctionaltobeappliedintheminimumprincipleofaccelerationofelastic- plasticcontinuaatfinitedeformation.Since thestrainratedependentCowper-Symondsequationisintegratedintostress-strainrelationequations, theeffectsofstrainratecouldbetakenintoaccount,andthedynamicresponseofsteelbeamunder explosionandimpactloadcouldbepredictedaccurately.Thevalidityofthemodelisverifiedbysimulatedresultsfromthegeneral- purposefiniteelementprogram ABAQUSandfurthercomparedwith therigid-plasticsolutions.Basedonnumericalsimulationofthismodel,theeffectofstrainrateon dynamicresponseofsteelbeamunderuniformlydistributingandconcentratepulseloadsisdiscussed indetail.Thenumericalresultsshowthatthereisanovelresponsemodeofabnormalbehaviorofthe steelbeams,theabnormalwindowisshiftedandenlarged,andtheactualpermanentdeflectionof steelbeamcannotbepredictedbypreviousrigid-plasticmodelincertainrangeofloadmagnitude.
- solidmechanics,
- abnormalbehavior,
- minimumprincipleofacceleration,
- steelbeam,
- novelresponsemode,
- strainrate