基于霍普金森压杆气凝胶及其复合材料抗冲击性能试验研究
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摘要
为了研究气凝胶及纤维增强气凝胶的抗冲击能力,分别对纯SiO_2气凝胶试件、SiO_2气凝胶基有机纤维毡、SiO_2气凝胶基玻璃纤维毡三种不同材料进行了霍普金森杆加载试验,将实验结果与入射杆直接撞击透射杆结果进行对比,分析了纯气凝胶及纤维增强气凝胶在装甲防护中的作用及其机理。实验结果表明:在冲击作用下,纯SiO_2气凝胶、SiO_2气凝胶基有机纤维毡会完全"粉碎",变成基体粉末和纤维,SiO_2气凝胶基玻璃纤维毡发生较大的压缩变形,部分基体和纤维被挤出;作为SiO_2气凝胶的增韧材料,玻璃纤维的作用要优于有机纤维的作用;气凝胶及其纤维增强材料在受到均匀冲击载荷时比受到局部载荷时更容易发挥其防护作用。
In order to find out the anti-impact capabilities of aerogels and fiber-reinforced aerogels,SiO_2 aerogels,organic fiber-reinforced SiO_2 aerogels and glass fiber-reinforced SiO_2 aerogels are respectively loaded with a split Hopkinson bar.A comparative study is made between the results and the direct impact of incident bar on the transmission bar.The function and mechanism of aerogels and fiber-reinforced aerogels in armor protection are analyzed.The results show that SiO_2 aerogels and organic fiber-reinforced SiO_2 aerogels are completely "crushed" and turned into matrix powder and fiber under impact.Glass fiber-reinforced SiO_2 aerogels produce relatively large compression deformation and parts of matrix and fiber are squeezed out;Glass fiber as toughening materials of SiO_2 aerogels is better than organic fiber;Aerorgls and fiber-reinforced aerogels have a better protective effect under a uniform impacting load than under a local load.
In order to find out the anti-impact capabilities of aerogels and fiber-reinforced aerogels,SiO_2 aerogels,organic fiber-reinforced SiO_2 aerogels and glass fiber-reinforced SiO_2 aerogels are respectively loaded with a split Hopkinson bar.A comparative study is made between the results and the direct impact of incident bar on the transmission bar.The function and mechanism of aerogels and fiber-reinforced aerogels in armor protection are analyzed.The results show that SiO_2 aerogels and organic fiber-reinforced SiO_2 aerogels are completely "crushed" and turned into matrix powder and fiber under impact.Glass fiber-reinforced SiO_2 aerogels produce relatively large compression deformation and parts of matrix and fiber are squeezed out;Glass fiber as toughening materials of SiO_2 aerogels is better than organic fiber;Aerorgls and fiber-reinforced aerogels have a better protective effect under a uniform impacting load than under a local load.
引文
[1]PIERRE A C,PAJONK G M.Chemistry of aerogels and their applications[J].Chemical Reviews,2002,102(11):4243-4266.
[2]LEVENTIS N,SOTIRIOU-LEVENTIS C,ZHANG G,et al.Nanoengineering strong silica aerogels[J].Nano letters,2002,2(9):957-960.
[3]KATTI A,SHIMPI N,ROY S,et al.Chemical,physical,and mechanical characterization of isocyanate cross-linked amine-modified silica aerogels[J].Chemistry of Materials,2006,18(2):285-296.
[4]LEVENTIS N.Three-dimensional core-shell superstructure:Mechanically strong aerogels[J].Accounts of Chemical Research,2007,40(9):874-884.
[5]KATTI A,SHIMPI N,ROY S.Chemical,physical,and mechanical characterization of isocyanate cross-linked amine modified silica aerogels[J].Chemistry of Materials,2006,18:28-296.
[6]HOWARD H W,MOLITORIS E F,DEHAVEN M R,et al.Shock propagation and instability structure in compressed silica aerogels[C]//International Workshop,New Models and Hydrocodes for Shock Wave Processing Condensed Matter.Edinburgh,UK:s.n.,2002.
[7]LUO H,CHURU G,FABRIZIO E F,et al.Synthesis and characterization of the physical,chemical and mechanical properties of isocyanatecrosslinked vanadia aerogels[J].Journal Sol-Gel Science and Technology,2008,48(1/2):113-134.
[8]杨杰,李树奎,王富耻,等.玻璃纤维增强气凝胶防护性能的研究[J].北京理工大学学报,2010,30(6):746-748.YANG Jie,LI Shu-kui,WANG Fu-chi,et al.Protective performance of glass fiber reinforced aerogels[J].Transactions of Beijing Institute of Technology,2009,30(6):746-748.(in Chinese)
[9]杨杰,李树奎,闫丽丽.玻璃纤维增强气凝胶在动态压缩下的变形行为[J].北京理工大学学报,2010,29(9):839-842.YANG Jie,LI Shu-kui,YAN Li-li.Deformation behavior of glass fiber reinforced aerogel under dynamic compression[J].Transactions of Beijing Institute of Technology.2010,29(9):839-842.(in Chinese)
[10]杨杰,李树奎,王富耻.气凝胶复合材料抗弹性能的研究[J].北京理工大学学报,2011,31(7):867-871.YANG Jie,LI Shu-kui,WANG Fu-chi.Research on the anti-bullet properties of aerogel composite materials[J].Transactions of Beijing Institute of Technology,2011,31(7):867-871.(in Chinese)
[2]LEVENTIS N,SOTIRIOU-LEVENTIS C,ZHANG G,et al.Nanoengineering strong silica aerogels[J].Nano letters,2002,2(9):957-960.
[3]KATTI A,SHIMPI N,ROY S,et al.Chemical,physical,and mechanical characterization of isocyanate cross-linked amine-modified silica aerogels[J].Chemistry of Materials,2006,18(2):285-296.
[4]LEVENTIS N.Three-dimensional core-shell superstructure:Mechanically strong aerogels[J].Accounts of Chemical Research,2007,40(9):874-884.
[5]KATTI A,SHIMPI N,ROY S.Chemical,physical,and mechanical characterization of isocyanate cross-linked amine modified silica aerogels[J].Chemistry of Materials,2006,18:28-296.
[6]HOWARD H W,MOLITORIS E F,DEHAVEN M R,et al.Shock propagation and instability structure in compressed silica aerogels[C]//International Workshop,New Models and Hydrocodes for Shock Wave Processing Condensed Matter.Edinburgh,UK:s.n.,2002.
[7]LUO H,CHURU G,FABRIZIO E F,et al.Synthesis and characterization of the physical,chemical and mechanical properties of isocyanatecrosslinked vanadia aerogels[J].Journal Sol-Gel Science and Technology,2008,48(1/2):113-134.
[8]杨杰,李树奎,王富耻,等.玻璃纤维增强气凝胶防护性能的研究[J].北京理工大学学报,2010,30(6):746-748.YANG Jie,LI Shu-kui,WANG Fu-chi,et al.Protective performance of glass fiber reinforced aerogels[J].Transactions of Beijing Institute of Technology,2009,30(6):746-748.(in Chinese)
[9]杨杰,李树奎,闫丽丽.玻璃纤维增强气凝胶在动态压缩下的变形行为[J].北京理工大学学报,2010,29(9):839-842.YANG Jie,LI Shu-kui,YAN Li-li.Deformation behavior of glass fiber reinforced aerogel under dynamic compression[J].Transactions of Beijing Institute of Technology.2010,29(9):839-842.(in Chinese)
[10]杨杰,李树奎,王富耻.气凝胶复合材料抗弹性能的研究[J].北京理工大学学报,2011,31(7):867-871.YANG Jie,LI Shu-kui,WANG Fu-chi.Research on the anti-bullet properties of aerogel composite materials[J].Transactions of Beijing Institute of Technology,2011,31(7):867-871.(in Chinese)