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
|
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
|
Theeffectsofstrainrateonthedynamicresponseandabnormalbehavior
ofsteelbeamsunderpulseloading
- 1.
SchoolofCivilEngineering,ShandongJianzhuUniversity,Jinan250101,Shandong,China
More Information
- Corresponding author:
XI Feng
- Publish Date:
2012-01-25
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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.
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References
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