Bendingbehaviorofthin-walledcylindricaltubesfilledwithmetallicfoam underlow-velocityimpac
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摘要: 采用实验方法研究了低速冲击下泡沫金属填充薄壁圆管的弯曲行为,详细说明了实验方法和原 理。通过与准静态实验结果的比较发现,冲击加载使泡沫金属填充圆管跨中截面的局部压入变形增大,跨中 截面高度变小,结构下缘拉裂破坏延迟。由于结构的惯性效应,锤头总冲击力高于准静态加载时的对应值。Abstract: Three-pointdynamicbendingtestsandquasi-statictestswerecarriedout,respectively.And theexperimentalmethodsandthecorrespondingexperimentalprinciplewereintroducedindetails.In theexperiments,aluminumalloy6063T6waschosenasthethin-walledtubematerial,thetubeswith threedifferentthicknessesof1.0,1.5and1.8mmhadanidenticaloutsidediameterof38mm,and thealuminum-alloyfoam withtwodifferentdensitieswasusedasfillingcores.Theexperimentalresultsdisplaythatunderlow- velocityimpact,thethinner-walledtubesarepronetotensiledamageat theloweredgesofthemiddlesections;thatduetotheinertiaeffect,thepunchforcesunderlow-velocityimpactarehigherthanthoseunderquasi- staticload.Inaddition,thelocalindentationbylowvelocityimpactislargerthanthatbyquasi- staticload,whichmakesthetensilefailureofthelower edgeofthestructuredelay.Hence,thebendingstiffnessofthemiddlesectionsunderlow-velocityimpactsignificantlydecreasesandtheultimatedisplacementwhenthestructuresfractureincreases.
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Key words:
- solidmechanics /
- bending /
- low-velocityimpact /
- thin-walledcylindricaltubes
期刊类型引用(3)
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2. 任新见,张庆明,刘瑞朝. 成层式结构泡沫空心球分配层抗爆性能试验研究. 振动与冲击. 2015(21): 100-104 . 百度学术
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