2.5D机织Cf/Al复合材料热残余应力与热变形细观力学分析

童德 蔡长春 王振军 刘燕武 张益豪 余欢 徐志锋

童德, 蔡长春, 王振军, 刘燕武, 张益豪, 余欢, 徐志锋. 2.5D机织Cf/Al复合材料热残余应力与热变形细观力学分析[J]. 航空材料学报, 2022, 42(2): 73-82. doi: 10.11868/j.issn.1005-5053.2021.000114
引用本文: 童德, 蔡长春, 王振军, 刘燕武, 张益豪, 余欢, 徐志锋. 2.5D机织Cf/Al复合材料热残余应力与热变形细观力学分析[J]. 航空材料学报, 2022, 42(2): 73-82. doi: 10.11868/j.issn.1005-5053.2021.000114
TONG De, CAI Changchun, WANG Zhenjun, LIU Yanwu, ZHANG Yihao, YU Huan, XU Zhifeng. Micromechanical FE analysis on thermal residual stress and shrinkage behavior of 2.5D woven Cf/Al composites[J]. Journal of Aeronautical Materials, 2022, 42(2): 73-82. doi: 10.11868/j.issn.1005-5053.2021.000114
Citation: TONG De, CAI Changchun, WANG Zhenjun, LIU Yanwu, ZHANG Yihao, YU Huan, XU Zhifeng. Micromechanical FE analysis on thermal residual stress and shrinkage behavior of 2.5D woven Cf/Al composites[J]. Journal of Aeronautical Materials, 2022, 42(2): 73-82. doi: 10.11868/j.issn.1005-5053.2021.000114

2.5D机织Cf/Al复合材料热残余应力与热变形细观力学分析

doi: 10.11868/j.issn.1005-5053.2021.000114
基金项目: 国家自然科学基金(52165018,51765045);航空科学基金(2019ZF056013);江西省自然科学基金重点项目(20202ACBL204010);国防基础科研计划(JCKY2018401C004)
详细信息
    通讯作者:

    王振军(1974—),男,博士,教授,主要研究先进航空复合材料设计制造,联系地址:江西省南昌市丰和南大道696号南昌航空大学(330036),E-mail: wangzhj@nchu.edu.cn

  • 中图分类号: TB333

Micromechanical FE analysis on thermal residual stress and shrinkage behavior of 2.5D woven Cf/Al composites

  • 摘要: 采用细观力学数值模拟与热性能实验结合的方法,研究2.5D机织Cf/Al复合材料降温热变形行为和热残余应力分布。根据解析法计算的纱线轴/横向热膨胀性能和纱线空间分布结构,建立复合材料细观力学有限元模型,计算得到的宏观热应变-温度曲线与热变形实验曲线吻合较好。复合材料制备后经纱和纬纱主要处于残余压应力状态,且纬纱表现出较高的残余应力水平;基体合金则主要处于残余拉应力状态,最大拉应力出现在经纱界面处并导致经纱与纬纱之间的区域出现局部界面脱粘,降低热残余应力是改善复合材料力学性能的重要技术手段。

     

  • 图  1  2.5D机织物和2.5D机织Cf/Al复合材料板材  (a)2.5D织物形貌;(b)2.5D机织结构;(c)2.5D机织复合材料板材

    Figure  1.  2.5D fabric structure and 2.5D woven Cf/Al composite plate  (a)2.5D fabric morphology; (b)2.5D woven structure; (c)2.5D woven composite plate

    图  2  2.5D机织Cf/Al复合材料纱线显微结构  (a)纬纱和衬纬纱截面形态;(b)经纱截面形态;(c)纱线内部微观组织

    Figure  2.  Microstructures of yarns in the 2.5D Cf/Al composites  (a)section shape of weft and liner yarn; (b)section shape of warp yarn; (c)microstructure of fiber bundle(SEM)

    图  3  2.5D机织Cf/Al复合材料细观结构模型

    Figure  3.  Mesoscopic model of 2.5D woven Cf/Al composites

    图  4  有限元模型多点约束条件施加原理

    Figure  4.  Multi-point constraints principle applied in FEM

    图  5  2.5D机织Cf/Al复合材料经向热应变实验曲线

    Figure  5.  Thermal strain experimental curve of warp direction in CF/Al composites

    图  6  2.5D机织Cf/Al复合材料制备降温热应变-温度实验曲线与计算曲线

    Figure  6.  Experimental and calculated curves of thermal strain- temperature during the cooling process of 2.5D woven Cf/Al composites

    图  7  热收缩应变量实验与计算值的相关性

    Figure  7.  Correlation coefficient between experimental and calculated values of thermal shrinkage strain variables

    图  8  2.5D机织Cf/Al复合材料的残余应力测试结果(X射线衍射法)

    Figure  8.  Residual stress on 2.5D woven Cf/Al composites measured by X-ray diffraction method

    图  9  2.5D机织Cf/Al复合材料热残余应力分布数值模拟结果  (a)复合材料;(b)基体合金;(c)纱线; (1)等效拉应力; (2)等效压应力

    Figure  9.  Numerical simulation results distribution of residual stress in composites  (a)composites; (b)matrix alloy; (c) yarn; (1)equivalent residual tensile stress; (2)equivalent residual compressive stress

    图  10  2.5D机织Cf/Al复合材料组元结构损伤状态模拟结果 (a)纱线状态; (b)基体状态; (c)界面状态; (d)界面脱粘;(e)界面微裂纹(TEM)

    Figure  10.  Simulation results of failure state of structure in 2.5 D woven Cf/Al composites  (a)status of yarn; (b)status of matrix ;(c)status of interface ;(d)interface debonding ;(e)interfacial microcrack (TEM)

    表  1  2.5D机织结构参数

    Table  1.   Structural parameters of the 2.5D woven fabric

    Warp/Weft yarn
    specification
    Liner weft
    specification
    Warp density/
    (bundle•10 mm–1)
    Weft density/
    (bundle•10 mm–1)
    Fiber volume
    fraction/%
    225 tex×2225 tex×18.04.042
    下载: 导出CSV

    表  2  碳纤维M40J基本性能参数

    Table  2.   Primary properties of carbon fiber M40J

    E1/GPaE2/GPaν12ν22G12/GPaG22/GPaα1/10–6K-1α2/10–6K-1
    377190.260.38.97.328
    下载: 导出CSV

    表  3  铝合金ZL301的化学成分(质量分数/%)

    Table  3.   Chemical composition of the aluminum alloy ZL301 (mass fraction/%)

    MgSiCuMnTiAlOthers
    9.5-11.00.30.10.150.15Bal
    下载: 导出CSV

    表  4  细观力学模型中纱线的弹性性能参数

    Table  4.   Elastic constants of yarns in micromechanical model

    E11/MPaE22=E33/MPaG12=G13/MPaG23/MPaν12=ν13ν23
    3027002350014700100000.280.41
    下载: 导出CSV

    表  5  纱线的轴向和横向线性热膨胀系数计算结果

    Table  5.   Calculated results of linear transverse direction thermal expansion coefficient in yarn’s longitudinal

    Temperature/℃αL/10–6K–1αT/10–6K–1
    253.11 9.94
    1003.0310.28
    2002.9410.39
    3002.8210.53
    4002.6810.78
    下载: 导出CSV

    表  6  基体合金宏观力学性能和热膨胀系数[26-28]

    Table  6.   Macroscopic mechanical properties and thermal expansion coefficient of matrix alloy[26-28]

    Temperature/℃E/GPaσ0/MPaσy/MPaνα/10–6K–1
    2564.681.4134.80.3322.7
    10057.774.8105.625.4
    20045.340.5 62.526.5
    30038.132.1 40.327.8
    40030.026.0 20.329.9
    下载: 导出CSV
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  • 收稿日期:  2021-07-05
  • 修回日期:  2021-08-23
  • 刊出日期:  2022-04-22

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