3D机织复合材料多向接头有限元分析
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摘要
为了探究3D机织复合材料桁架接头的机械性能,采用有限元软件ANSYS对3D机织复合材料多向接头所在桁架总体进行有限元模拟,模拟中根据纤维走向对多向接头不同轴向圆管建立相应坐标系,并赋予材料属性,使用MPC多点约束法施加载荷.求解分析后结果表明:模拟结果与实测结果中最大应变的位置与数值基本吻合,确定了模拟的有效性;将最大应力与破坏应力对比发现接头在当前载荷下可能发生轻微破坏,破坏位置应位于副管顶部;通过模拟判断了实测中发生轻微响声的原因;将4种角联锁结构的多向接头模拟结果对比发现,带有衬经结构的复合材料为多向接头最佳材料.此次模拟补充了实测中无法得到的数据,为接头的优化设计和实际使用提供一定的帮助.
The finite element simulation of 3D woven composites multidirectional joint truss was performed using commercial ANSYS software,aiming to evaluate its mechanical properties. The simulation of different axial tubes of the multidirectional connector has its own coordinate system,which is established based on fiber direction.Main loading that the joints might suffer was ascertained,in order to simulate the real stress state. The MPC multi-point constraint method was used to apply load. The validity of analysis results were verified by comparison with the test data. The maximum strain's position of analysis results was basically consistent with the measured results,suggesting the validity of simulation. Comparison of the maximum stress with failure stress indicates that under the current load,the joints may be damaged,and the damage location should be located in the top of the vice tube. The reasons for slight sound during the testing were determined through simulation. By the comparison of four different angular interlock joints,it was shown that the optimum material is the one with warp-stuffer. The method and results can provide reference for the design of joint and will benefit the practical application.
The finite element simulation of 3D woven composites multidirectional joint truss was performed using commercial ANSYS software,aiming to evaluate its mechanical properties. The simulation of different axial tubes of the multidirectional connector has its own coordinate system,which is established based on fiber direction.Main loading that the joints might suffer was ascertained,in order to simulate the real stress state. The MPC multi-point constraint method was used to apply load. The validity of analysis results were verified by comparison with the test data. The maximum strain's position of analysis results was basically consistent with the measured results,suggesting the validity of simulation. Comparison of the maximum stress with failure stress indicates that under the current load,the joints may be damaged,and the damage location should be located in the top of the vice tube. The reasons for slight sound during the testing were determined through simulation. By the comparison of four different angular interlock joints,it was shown that the optimum material is the one with warp-stuffer. The method and results can provide reference for the design of joint and will benefit the practical application.
引文
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[2]RICHARD D.Commercialising aerospace composites[J].Reinforced Plastics,2004,48(4):32-34.
[3]汪海芳.复合材料支架结构的力学性能分析[D].哈尔滨:哈尔滨工业大学,2007.
[4]熊波,林国昌,张印桐,等.一种复合材料桁架的制备及弯曲承载性能分析[J].哈尔滨工业大学学报,2014,46(5):46-50.XIONG Bo,LIN Guochang,ZHANG Yintong,et al.Fabrication and bending and bearing capacity analysis of an integrated manufacturing composite truss[J].Journal of Harbin Institute of Technology,2014,46(5):46-50.
[5]LIU Yuqing,XIN Haohui,HE Jun,et al.Experimental and analytical study on fatigue behavior of composite truss joints[J].Journal of Constructional Steel Research,2013,83:21-36.
[6]XUE Dongyan,LIU Yuqing,HE Jun,et al.Experimental study and numerical analysis of a composite truss joint[J].Journal of Constructional Steel Research,2011,67:957-964.
[7]鞠苏.大跨度复合材料支架及其快速架撤机构设计[D].长沙:国防科学技术大学,2006.
[8]JEFF W,YAP H,MURRAY L S,et al.The analysis of skin-to-stiffener debonding in composite aerospace structure[J].Comp Struct,2002,57(1):425-435.
[9]熊波.三角截面狭长构型复合材料桁架承载性能分析[D].哈尔滨:哈尔滨工业大学,2012.
[10]ZHANG Ruirui,GUO Xiaogan,LIU Yanju,et al.Theoretical analysis and experiments of a space depolyable truss structure[J].Composite Structures,2014,112:226-230.
[11]高相胜,张以都,黎定仕.面内损伤对埋藏分层影响的三维有限元分析[J].材料科学与工艺,2011,19(3):26-31.GAO Xiangsheng,ZHANG Yidu,LI Dingshi.3D FEM analysis of the effects of in-plane damages on embedded delamination[J].Materials Science&Technology,2011,19(3):26-31.
[12]杨红娜,黄航,沃西源,等.桁架结构卫星接头的研究进展[J].航天返回与遥感,2003,24(2):58-60.YANG Hongna,HUANG Hang,WO Xiyuan,et al.Investigation and development of joints of truss-structure satellite[J].Spacecraft recovery&Remote Sensing,2003,24(2):58-60.
[13]郑百林,张士元,贺鹏飞,等.卫星桁架复合材料多连通接头性能的测试与分析[J].复合材料学报,2005,22(6):172-177.ZHENG Bailin,ZHANG Shiyuan,HE Pengfei,et al.Experiments and analysis for carbon fiber reinforced composite multi-joints of the satellite antenna truss[J].Acta Materiae Compositae Sinica,2005,22(6):172-177.
[14]孙颖,陈利,李嘉禄.炭/环氧三维多向编织复合材料圆管相贯接头承载有限元分析[J].固体火箭技术,2008,31(3):266-274.SUN Ying,CHEN Li,LI Jialu.Finite element analysis on loading properties of intersecting tubular joint with carbon/epoxy 3D multidirectional braided composite[J].Journal of Solid Rocket Technology,2008,31(3):266-274.
[15]ZHAO Libin,QIN Tianliang,HUANG Hai,et al.Model investigation on composite failure prediction of joint structures[J].Rare Mental Materials and Engineering,2009,38(S3):105-108.
[16]梁东平,柴洪友,曾福明.月球着陆器着陆腿非线性有限元建模与仿真[J].北京航空航天大学学报,2013,39(1):11-15.LIANG Dongping,CHAI Hongyou,ZENG Fuming.Non-linear finite element modeling and simulation for landing leg of lunar lander[J].Journal of Beijing University of Aeronautics and Astronautics,2013,39(1):11-15.
[17]杨彩云.三维角联锁结构复合材料的力学性能研究[D].天津:天津工业大学,2005.