孔结构金属复合夹芯板抗爆炸冲击响应及吸能特性研究
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摘要
采用有限元方法研究爆炸载荷下四边固支孔结构金属复合夹芯板的动力响应及吸能特性,给出了孔结构金属复合夹芯板的动力响应过程,得到夹芯板的变形模式,比较了孔结构金属复合夹芯板与非孔结构金属复合夹芯板的抗爆炸冲击性能,同时讨论了孔大小、间距、排布方式和面板质量分布等因素对孔结构金属复合夹芯板抗爆炸冲击性能的影响。研究结果表明,迎爆面外面板的孔设计使爆炸冲击波穿过孔洞直接作用在芯材上,增强了芯材的压缩,从而提高了夹芯板的能量吸收能力。同等面密度情况下,内外面板厚度比大于1的孔结构金属复合夹芯板变形挠度小于内外面板厚度比小于1的孔结构金属复合夹芯板。进一步研究发现,通过合理设计内外面板的质量分布,可以使孔结构金属复合夹芯板的抗爆炸冲击性能最优。
In this paper,dynamic response and energy absorption of clamped perforated metal sandwich plates is studied using the finite element method.The process of dynamic response and deformation modes of perforated metal sandwich plates are obtained.Comparison of dynamic responses between perforated and unperforated sandwich plates is made.Effects of size,space,arrangement of holes and mass distribution of the face sheets on blast resistance of sandwich plates are discussed in detail.It is shown that the shock wave applied on metal foam core through the holes in outer face sheet results in enhanced the core compression and improved energy absorption of sandwich plates.The deflection of sandwich plates with thicknesses ratio of inner face sheet to outer face sheet larger than 1 is less than that of is the plates with thickness ratios of smaller than 1 for the same area density.Optimal blast resistance of perforated sandwich plates is achieved by rationally designing mass distribution of face sheets.
In this paper,dynamic response and energy absorption of clamped perforated metal sandwich plates is studied using the finite element method.The process of dynamic response and deformation modes of perforated metal sandwich plates are obtained.Comparison of dynamic responses between perforated and unperforated sandwich plates is made.Effects of size,space,arrangement of holes and mass distribution of the face sheets on blast resistance of sandwich plates are discussed in detail.It is shown that the shock wave applied on metal foam core through the holes in outer face sheet results in enhanced the core compression and improved energy absorption of sandwich plates.The deflection of sandwich plates with thicknesses ratio of inner face sheet to outer face sheet larger than 1 is less than that of is the plates with thickness ratios of smaller than 1 for the same area density.Optimal blast resistance of perforated sandwich plates is achieved by rationally designing mass distribution of face sheets.
引文
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[2] Zhang J X,Qin Q H,Yang Y,et al.Large -deflection bending of clamped metal foam-filled rectangular tubes[J].International Journal of Applied Mecha-nics,2017,9(3):1750043.
[3] Sun G Y,Chen D D,Huo X T,et al.Experimental and numerical studies on indentation and perforation cha-racteristics of honeycomb sandwich panels[J].Composite Structures,2018,184:110-124.
[4] Grondin J S,Lee J H S.Experimental observation of the onset of detonation downstream of a perforated plate[J].Shock Waves,2010,20(5):381-386.
[5] Rakv?g K G,Underwood N J,Schleyer G K,et al.Transient pressure loading of clamped metallic plates with pre -formed holes[J].International Journal of Impact Engineering,2013,53:44-55.
[6] Hallquist J O.LS -DYNA Theoretical Manual[M].Livermore:Livermore Software Technology,1998.
[7] Deshpande V S,Fleck N A.Isotropic constitutive models for metallic foams[J].Journal of the Mechanics and Physics of Solids,2000,48(6-7):1253-1283.
[8] Ashby M F,Evans T,Fleck N A,et al.Metal Foams:A Design Guide[M].London:Butterworth-Heinemann,2000.
[9] Qiu X M,Deshpande V S,Fleck N A.Finite element analysis of the dynamic response of clamped sandwich beams subject to shock loading[J].European Journal of Mechanics -A,2003,22(6):801-814.
[10] 秦庆华,张建勋,艾伟龙,等.轻质金属泡沫夹芯曲板的抗爆炸冲击响应研究[J].固体力学学报,2017,38(5):391-399.(QIN Qing -hua,ZHANG Jian-xun,AI Wei-long,et al.Study on resistance of lightweight sandwich curve plates with metal foam core to blast loadings [J].Chinese Journal of Solid Mechanics,2017,38(5):391-399.(in Chinese))
[11] Zhu F,Zhao L M,Lu G X,et al.Structural response and energy absorption of sandwich panels with an aluminium foam core under blast loading [J].Advances in Structural Engineering,2008,11(5):525-536.