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热力耦合作用下复合材料搭接结构强度研究

余芬 刘武帅 王伟韬 何振鹏

余芬, 刘武帅, 王伟韬, 何振鹏. 热力耦合作用下复合材料搭接结构强度研究[J]. 机械科学与技术, 2019, 38(5): 796-802. doi: 10.13433/j.cnki.1003-8728.20180241
引用本文: 余芬, 刘武帅, 王伟韬, 何振鹏. 热力耦合作用下复合材料搭接结构强度研究[J]. 机械科学与技术, 2019, 38(5): 796-802. doi: 10.13433/j.cnki.1003-8728.20180241
Yu Fen, Liu Wushuai, Wang Weitao, He Zhenpeng. Study on Strength of Composite Lap Structures under Thermal Mechanical Coupling[J]. Mechanical Science and Technology for Aerospace Engineering, 2019, 38(5): 796-802. doi: 10.13433/j.cnki.1003-8728.20180241
Citation: Yu Fen, Liu Wushuai, Wang Weitao, He Zhenpeng. Study on Strength of Composite Lap Structures under Thermal Mechanical Coupling[J]. Mechanical Science and Technology for Aerospace Engineering, 2019, 38(5): 796-802. doi: 10.13433/j.cnki.1003-8728.20180241

热力耦合作用下复合材料搭接结构强度研究

doi: 10.13433/j.cnki.1003-8728.20180241
基金项目: 

中央高校基本科研基金项目 3122015C015

国家自然科学基金项目 51505482

中国民航局科技计划项目 MHRD20160106

详细信息
    作者简介:

    余芬(1963-), 教授, 硕士, 研究方向为航空复合材料制造与修理, fyu@cauc.edu.cn

    通讯作者:

    何振鹏, 讲师, hezhenpeng@tju.edu.cn

  • 中图分类号: V257

Study on Strength of Composite Lap Structures under Thermal Mechanical Coupling

  • 摘要: 复合材料铆钉搭接结构在温度变化情况下强度的研究对复合材料在航空领域上的应用具有重要的意义。为研究温度的变化对复合材料铆钉搭接结构强度的影响,考虑到模型具有高度的非线性问题,因此选用ABAQUS/Explicit求解器进行热力耦合过程的准静态模拟。通过编写VUMAT子程序,修改了材料的本构模型,考虑了温度对复合材料基本属性的影响,添加了混合失效准则以及材料失效后的参数退化方式。在25℃和105℃条件下分别对有开孔的复合材料板进行了压缩的模拟和复合材料铆钉搭接结构进行了拉伸的模拟。研究结果表明,温度的升高会降低压缩载荷作用下复合材料板和拉伸载荷作用下复合材料铆钉搭接结构的刚度与强度。
  • 图  1  复合材料铺层角度示意图

    图  2  VUMAT子程序计算流程图

    图  3  复合材料铆钉单搭接模型

    图  4  有限元模型

    图  5  受压缩载荷的复合材料板位移-载荷曲线

    图  6  受拉伸载荷的铆钉搭接结构位移-载荷曲线

    图  7  基体拉伸失效起始及扩展

    图  8  纤维压缩失效和基体压缩失效模式

    图  9  25 ℃和105 ℃条件下搭接结构动能与内能比值

    表  1  刚度退化模式

    损伤类型 材料参数退化方式
    基体拉伸 E22=0.2E22, G12=0.2G12, G23=0.2G23
    基体压缩 E22=0.4E22, G12=0.4G12, G23=0.4G23
    纤维拉伸 Eii=0.07Eii, Gij=0.07Gij, υij=0.07υij(i, j=1, 2, 3, ij)
    纤维压缩 Eii=0.14Eii, Gij=0.14Gij, υij=0.14υij(i, j=1, 2, 3, ij)
    纤维基体剪切 G12=0.1G12, υ12=0.1υ12
    分层 E33=0.1E33, G23=0.1G23, G13=0.1G13, υ23=0.1υ23, υ13=0.1υ13
    下载: 导出CSV

    表  2  复合材料基本属性及性能指标(υ为无量纲值)

    基本属性 数值/MPa 性能指标 数值/MPa
    E1 115 142 Xt 1 447
    E2 6 894 Xc 1 172
    G12 12 410 Yt 68.9
    υ 0.332 Yc 262
    S 279
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-06-03
  • 刊出日期:  2019-05-05

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