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缎纹编织复合材料紧固件拉拔试验及数值模拟

边天涯 关志东 刘发齐

边天涯, 关志东, 刘发齐等 . 缎纹编织复合材料紧固件拉拔试验及数值模拟[J]. 北京航空航天大学学报, 2017, 43(2): 311-318. doi: 10.13700/j.bh.1001-5965.2016.0137
引用本文: 边天涯, 关志东, 刘发齐等 . 缎纹编织复合材料紧固件拉拔试验及数值模拟[J]. 北京航空航天大学学报, 2017, 43(2): 311-318. doi: 10.13700/j.bh.1001-5965.2016.0137
BIAN Tianya, GUAN Zhidong, LIU Faqiet al. Tensile test and numerical simulation for satin weave composite fastener[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(2): 311-318. doi: 10.13700/j.bh.1001-5965.2016.0137(in Chinese)
Citation: BIAN Tianya, GUAN Zhidong, LIU Faqiet al. Tensile test and numerical simulation for satin weave composite fastener[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(2): 311-318. doi: 10.13700/j.bh.1001-5965.2016.0137(in Chinese)

缎纹编织复合材料紧固件拉拔试验及数值模拟

doi: 10.13700/j.bh.1001-5965.2016.0137
详细信息
    作者简介:

    边天涯,男,博士研究生。主要研究方向:复合材料结构设计

    关志东,男,博士,教授,博士生导师。主要研究方向:飞机结构损伤容限设计,复合材料结构设计,飞机结构修理设计

    通讯作者:

    关志东,E-mail:d5062010@163.com

  • 中图分类号: V257;TB332

Tensile test and numerical simulation for satin weave composite fastener

More Information
  • 摘要:

    缎纹编织复合材料紧固件中螺牙细节尺寸已达到细观尺度量级,若在数值模拟过程中对于螺牙采用统一的材料属性,则不能准确地模拟其真实失效模式。针对此问题,建立的紧固件螺牙有限元模型是由若干层简化缎纹编织复合材料细观结构代表体积单元堆叠而成,如此模型可包含必要的纤维分区和基体分区。对螺牙模型进行拉拔试验模拟,并基于各组分材料的失效判据,实现对紧固件破坏载荷的预报。完成了缎纹编织碳/碳复合材料单螺牙紧固件拉拔试验。模拟失效模式与真实失效模式吻合良好,二者破坏载荷误差为5.17%,验证了有限元模型的合理性。

     

  • 图 1  8枚缎纹编织复合材料单胞

    Figure 1.  RVE of 8-harness satin weave composite

    图 2  缎纹编织碳/碳复合材料紧固件

    Figure 2.  Satin weave carbon/carbon composite fastener

    图 3  缎纹编织碳/碳复合材料试验件加工方向示意图

    Figure 3.  Schematic diagram of processing direction of satin weave carbon/carbon composite specimen

    图 4  紧固件拉拔试验夹具

    Figure 4.  Fixture of fastener tensile test

    图 5  试验载荷-位移曲线

    Figure 5.  Force-displacement curve of test

    图 6  缎纹编织碳/碳复合材料单牙紧固件试验后照片

    Figure 6.  Photographs of satin weave carbon/carbon composite single thread fastener after test

    图 7  缎纹编织简化单胞有限元模型

    Figure 7.  Finite element model of simplified satin weave RVE

    图 8  螺牙及螺母有限元模型

    Figure 8.  Finite element models of thread and nut

    图 9  螺牙及螺母有限元网格

    Figure 9.  Finite element grids of thread and nut

    图 10  碳布单元受力状态[22]

    F—碳布单元受力;σf1—上层纤维束1方向正应力;σf2—下层纤维束2方向正应力;σm1, σ1—上层和下层基体1方向正应力;σm2, σ2—下层和上层基体2方向正应力。

    Figure 10.  Forced state of carbon cloth element[22]

    图 11  螺牙失效分布图

    Figure 11.  Failure distribution of thread

    图 12  试验和有限元方法载荷-位移曲线

    Figure 12.  Force-displacement curves of test and FEM

    表  1  缎纹编织复合材料单胞几何参数[16]

    Table  1.   Geometric parameters of satin weave composite RVE[16]

    几何参数 数值
    单胞宽度/mm 10.40
    单胞厚度/mm 0.46
    经纬向纤维束宽度/mm 0.60
    经纬向纤维束高度/mm 0.20
    穿刺纤维束横截面直径/mm 0.58
    下载: 导出CSV

    表  2  缎纹编织碳/碳复合材料试验件尺寸

    Table  2.   Sizes of satin weave carbon/carbon composite specimen

    几何尺寸 数值
    螺牙间距/mm 1.5
    螺牙顶角/(°) 60
    螺牙高度/mm 1.3
    光杆直径/mm 10
    下载: 导出CSV

    表  3  T300纤维材料力学性能[20]

    Table  3.   Mechanical properties of T300 fiber[20]

    性能参数 数值
    纵向弹性模量Ef1/GPa 230
    横向弹性模量Ef2/GPa 15
    纵横剪切模量Gf12/GPa 15
    纵横主泊松比νf21 0.2
    横向剪切模量Gf23/GPa 7
    横向泊松比νf23 0.07
    纵向拉伸强度XfT/MPa 2 500
    纵向压缩强度XfC/MPa 2 000
    下载: 导出CSV

    表  4  无孔隙碳基体材料力学性能

    Table  4.   Mechanical properties of pure carbon matrix

    性能参数 数值
    弹性模量Em/GPa[16] 9.254
    泊松比νm[16] 0.23
    剪切强度/MPa[15] 37.6
    下载: 导出CSV

    表  5  缎纹编织碳/碳复合材料单牙紧固件拉拔试验结果

    Table  5.   Results of satin weave carbon/carbon composite single thread fastener tensile test

    试验名称 破坏载荷/N
    单牙螺钉拉拔 905.70
    下载: 导出CSV

    表  6  碳布有效力学性能

    Table  6.   Effective mechanical properties of carbon cloth

    性能参数 数值
    面内弹性模量/GPa 58.4
    面内泊松比 0.010 5
    面内剪切模量/GPa 5.41
    离面弹性模量/GPa 12.2
    离面泊松比 0.18
    离面剪切模量/GPa 7.44
    下载: 导出CSV

    表  7  螺母有效力学性能

    Table  7.   Effective mechanical properties of nut

    性能参数 数值
    螺母弹性模量/GPa[16] 39.92
    螺母泊松比 0.05
    下载: 导出CSV

    表  8  试验和有限元方法破坏载荷

    Table  8.   Damage forces of test and FEM

    试验名称 破坏载荷
    试验/N FEM/N 误差/%
    单牙螺钉拉拔 905.70 858.86 5.17
    下载: 导出CSV
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出版历程
  • 收稿日期:  2016-02-23
  • 录用日期:  2016-05-20
  • 网络出版日期:  2017-02-20

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