Dynamicresponsesofliquid-filledthin-wall hemisphericalshellsunderimpact
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摘要: 采用DHR9401作为加载工具对充液夹层构形的薄壁半球壳组合结构受质量块冲击的动力响应进 行了实验研究。给出了冲击力和内压力时程曲线,结合实验变形过程的观察可以看出,冲击引起半球壳的动 力响应可分为4个阶段:冲击点处的扁平化;壳面凹陷形成塑性铰并向外扩张;冲头对塑性棱区的压平以及弹 性恢复。实验结果表明,双层充液球壳在受到载荷冲击时,由于液体作用使外壳受到的局部冲击转化成面载 荷均匀加载在内壳上,使之具有更大的承载能力。采用夹层充液组合构形的半球壳组合结构的耐撞性有了很 大的提高,在一定的冲击能量下,内部的球壳变形量很小,可以提供有效的安全防护空间。Abstract: Experimentswerecarriedouttostudythedynamicresponseoftheliquid-filledthin-wall hemisphericalshellunderimpactusingtheDHR9401drophammerastheloadingdevice.According totheconfigurationsofthehemisphericalshells,theexperimentaldevicewaselaboratelydesignedto achievetheidealsealforfillingliquid.Thetimehistoriesoftheimpactforceandtheinternalpressure wererecordedfordifferenthemisphericalshells.Fourdistinctdeformationmodesofthehemispherical shellsunderimpactwereobservedasfollows:(1)flatteningoftheupwardlyprotrudingpoints,(2) inwarddimplingwithplastichingesfollowedbyoutwardexpanding,(3)flatteningoftheplasticedge regions,and(4)elasticrecovering.Theexperimentalresultsshowthatdouble-wallliquid-filledhemisphericalshellshavebetterimpactresistancethanthesingle- wallhemisphericalshells,fortheliquid filledcanreducethedeformationoftheinternalshellbyturningpointimpactintoevensurfaceimpact undertheexperimentalimpactconditions.Sothedoubleor multi-layerliquid-filledhemispherical shellscanprovidesatisfyingprotectionunderacertainimpactloading.
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Key words:
- solidmechanics /
- dynamicresponse /
- impact /
- hemi-sphericalshell /
- liquid-filled
期刊类型引用(3)
1. 余同希，朱凌，许骏. 结构冲击动力学进展（2010-2020）. 爆炸与冲击. 2021(12): 4-64 . 
本站查看2. 胡建星，徐乐，杨会伟，张恩，路国运. 边界条件对半球壳准静态屈曲行为的影响. 太原理工大学学报. 2016(03): 411-417 . 
百度学术3. 管文博，杨会伟，胡建星，韩志军，路国运. 落锤冲击作用下充液半球壳的实验和数值分析. 振动与冲击. 2014(21): 148-154 . 百度学术其他类型引用(5)
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