三维编织复合材料横向冲击变形与细观结构关系
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摘要
采用改进分离式霍普金森压杆(SHPB)对三维四向(3D4D)和三维五向(3D5D)编织复合材料进行横向冲击试验。利用高速摄影记录冲击变形和损伤扩展情况,探究细观结构对三维编织复合材料横向冲击变形的影响。研究结果表明:与3D4D编织复合材料相比,3D5D编织复合材料冲击载荷峰值较大且冲击变形较小,其失效模式主要是基体脆裂;3D4D编织复合材料主要失效模式为纤维束断裂;3D5D编织复合材料中轴纱的存在使应力沿轴向传播,有效抵抗横向冲击变形。
The transverse impact experiments of three-dimensional four-directional(3 D4 D)and threedimensional five-directional(3 D5 D)braided composites were conducted on a modified split Hopkinson pressure bar(SHPB)testing system.In order to investigate the effects of microstructures on transverse impact deformation,we recorded impact deformations and damages under transverse impact loading by high speed camera.The results show that 3 D5 D braided composites could undertake higher impact load while the impact deformation is smaller than that of 3 D4 D braided composites.The main failure mode of3 D5 D material is matrix crack and fiber breakages for 3 D4 D braided composites.Due to the presence of straight axial yarns in 3 D5 D braided composite,the stress spreads along the axial direction,thus obtaining the improved anti-impact performance.
The transverse impact experiments of three-dimensional four-directional(3 D4 D)and threedimensional five-directional(3 D5 D)braided composites were conducted on a modified split Hopkinson pressure bar(SHPB)testing system.In order to investigate the effects of microstructures on transverse impact deformation,we recorded impact deformations and damages under transverse impact loading by high speed camera.The results show that 3 D5 D braided composites could undertake higher impact load while the impact deformation is smaller than that of 3 D4 D braided composites.The main failure mode of3 D5 D material is matrix crack and fiber breakages for 3 D4 D braided composites.Due to the presence of straight axial yarns in 3 D5 D braided composite,the stress spreads along the axial direction,thus obtaining the improved anti-impact performance.
引文
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[3]SUN B Z,HU D M,GU B H.Transverse impact damage and energy absorption of 3-D multi-structured knitted composite[J].Composites Part B:Engineering,2009,40(6):572-583.
[4]ZHANG Y, WANG P, GUO C B. Energy absorption behaviors of 3Dbraided composites under impact loadings with frequency domain analysis[J].Polymer Composites,2016,37(5):1620-1627.
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[6]LIU Y,CHEN Z F,ZHU J X,et al.Comparison of 3Dfourdirectional and five-directional braided SiO2f/SiO2 composites with respect to mechanical properties and fracture behavior[J].Materials Science and Engineering A,2012,558:170-174.
[7]LI D S,FANG D N,JIANG Nan,et al.Finite element modeling of mechanical properties of 3D five-directional rectangular braided composites[J]. Composites Part B:Engineering,2011,42(6):1373-1385.
[8]LI D S,LU Z X,CHEN L,et al. Microstructure and mechanical properties of three-dimensional five-directional braided composites[J].International Journal of Solids and Structures,2009,46(18/19):3422-3432.
[9]LI D S,LU Z X,JIANG N,et al.High strain rate behavior and failure mechanism of three-dimensional five-directional carbon/phenolicbraidedcompositesundertransverse compression[J].Composites Part B:Engineering,2011,42(2):309-317.
[10]ZHOU H L,PAN Z X,GIDEON,ROTICH K,et al.Experimental and numerical investigation of the transverse impact damage and deformation of 3-D circular braided composite tubes from meso-structure approach[J].Composites Part B:Engineering,2016,86:243-253.
[11]ZHOU H L,SUN B Z,GU B H.Responses of 3Dfourdirectional and five-directional circular braided composite tubes under transverse impact[J]. International Journal of Crashworthiness,2016,21(4):353-366.
[12]ZHOU H L,ZHANG W,LIU T,et al.Finite element analyses on transverse impact behaviors of 3-D circular braided composite tubes with different braiding angles[J].Composites Part A:Applied Science and Manufacturing,2015,79:52-62.
[13]陈利,李嘉禄,李学明,等.三维方型编织预制件的纱线编织结构[J].复合材料学报,2000,17(3):1-5.
[14]MEYERS M A.Dynamic behavior of materials[M].New York:John Wiley&Sons Inc,1994:23-61.
[15]孙水发,董方敏.Image J图像处理与实践[M].北京:国防工业出版社,2013:70-102.
[16]孙宝忠.三维纺织结构复合材料压缩性能的应变率效应及动态特性分析[D].上海:东华大学纺织学院,2010:12-17.