低速冲击下泡沫金属填充薄壁圆管的弯曲行为

谢中友; 虞吉林; 郑志军

doi:10.11883/1001-1455(2012)02-0169-05

低速冲击下泡沫金属填充薄壁圆管的弯曲行为

doi: 10.11883/1001-1455(2012)02-0169-05

1.
铜陵学院土木建筑系,安徽铜陵244000;
2.
中国科学技术大学中国科学院材料力学行为和设计重点实验室,安徽合肥230026

基金项目:

国家自然科学基金项目(90205003,10532020,10672156)

详细信息

通讯作者:
谢中友

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出版历程
- 刊出日期: 2012-03-25

Bendingbehaviorofthin-walledcylindricaltubesfilledwithmetallicfoam underlow-velocityimpac

1.
DepartmentofCivilandArchitecturalEngineering,TonglingUniversity,
2.
Tongling 244000,Anhui,China;

Funds:

NationalNaturalScienceFoundationofChina(90205003,10532020,10672156)

More Information

Corresponding author: XIE Zhong-you

摘要

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。
- 固体力学 /
- 弯曲 /
- 低速冲击 /
- 薄壁圆管
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.
- solidmechanics /
- bending /
- low-velocityimpact /
- thin-walledcylindricaltubes