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针刺C/C复合材料面内拉伸强度预测

刘文台 程坤 周何乐子 白侠 廖敦明 周华民

刘文台, 程坤, 周何乐子, 等. 针刺C/C复合材料面内拉伸强度预测[J]. 复合材料学报, 2023, 40(待排刊): 1-12
引用本文: 刘文台, 程坤, 周何乐子, 等. 针刺C/C复合材料面内拉伸强度预测[J]. 复合材料学报, 2023, 40(待排刊): 1-12
Wentai LIU, Kun CHENG, Helezi ZHOU, Xia BAI, Dunming LIAO, Huamin ZHOU. Prediction of in-plane tensile strength of needle punched C/C composites[J]. Acta Materiae Compositae Sinica.
Citation: Wentai LIU, Kun CHENG, Helezi ZHOU, Xia BAI, Dunming LIAO, Huamin ZHOU. Prediction of in-plane tensile strength of needle punched C/C composites[J]. Acta Materiae Compositae Sinica.

针刺C/C复合材料面内拉伸强度预测

基金项目: 国家自然科学基金(U20A20288);校启动经费(2020kfyXJJS001)
详细信息
    通讯作者:

    周何乐子,博士,讲师,硕士生导师,研究方向为碳纤维复合材料成形及力学 E-mail: helezizhou@hust.edu.cn

    廖敦明,博士,教授,博士生导师,研究方向为复合材料成型过程模拟 E-mail:liaodunming@hust.edu.cn

Prediction of in-plane tensile strength of needle punched C/C composites

  • 摘要: 为研究针刺碳纤维增强碳基体复合材料(针刺C/C复合材料)面内拉伸强度与渐进损伤,建立了针刺C/C复合材料代表性体积单元有限元模型。模型包含无纬布层、网胎层、针刺纤维束、界面4类子区域,并考虑了孔隙的影响。采用基于应变的破坏准则及指数型损伤演化规律研究无纬布层及针刺纤维束损伤,采用弹塑性本构研究网胎层损伤,采用内聚力牵引分离定律和二次应力破坏准则分析界面损伤。通过两步法计算了孔隙对材料性能的折减效果,并得到上述4个子区域的力学性能,通过ABAQUS UMAT预测了材料的面内拉伸应力-应变曲线及各子区域损伤起始、演化与失效过程,非线性趋势及拉伸强度数值与试验数值吻合较好,验证了该模型有效性。

     

  • 图  1  针刺碳纤维预制体结构示意图

    Figure  1.  Schematic diagram of needle punched carbon fiber preform

    图  2  针刺C/C复合材料结构形貌

    Figure  2.  Structural morphologies of the needle punched C/C composite

    (a) Local morphology A (b) Local morphology B

    图  3  针刺C/C复合材料代表性体积单元(RVE)网格模型

    Figure  3.  Geometric model of representative volume element (RVE) for needle punched C/C composites

    (a) Overall model (b) Needling fibers (c) Interface

    图  4  网胎层力-位移响应趋势

    Figure  4.  Force displacement response trend of the short cut fiber felt

    图  5  拉伸试验

    Figure  5.  Tensile test

    图  6  针刺C/C复合材料面内拉伸模拟和试验应力-应变曲线对比

    Figure  6.  Comparison of stress-strain curves between in-plane tensile simulation and test for needle punched C/C composites

    图  7  针刺C/C复合材料90°无纬布层基体损伤演化

    Figure  7.  Damage evolution of matrix in 90° non-woven cloth for needle punched C/C composites

    图  8  针刺C/C复合材料不同层90°层无纬布层最终时刻基体损伤

    Figure  8.  Matrix damage of different 90°non-woven cloths at the final moment for needle punched C/C composites

    图  9  针刺C/C复合材料0°无纬布层纤维/基体损伤演化

    Figure  9.  Damage evolution of fiber and matrix in 0° non-woven cloth for needle punched C/C composites

    图  10  针刺C/C复合材料网胎层应力变化

    Figure  10.  Stress variation of short cut fiber felt for needle punched C/C composites

    图  11  针刺C/C复合材料无纬布层与网胎层间界面损伤演化

    Figure  11.  Damage evolution of the interface for needle punched C/C composites

    表  1  针刺C/C复合材料各区域成分体积分数

    Table  1.   Ingredient volume fraction of needle punched C/C composites

    RegionFiber volume fraction${V_{f} }$/%Matrix volume fraction${V_m}$/%Pore volume fraction${V_p}$/%
    Needle punched C/C composite33.347.419.3
    Non-woven cloth(Needling fibers)35.659.54.9
    Short cut fiber felt31.738.729.6
    下载: 导出CSV

    表  2  针刺C/C复合材料RVE模型几何参数

    Table  2.   Geometric parameters of the RVE model for needle punched C/C composites

    RegionLength/
    mm
    Width/
    mm
    Height/
    mm
    Needle punched C/C composite 2.5 2.5 4.8
    Non-woven cloth 2.5 2.5 0.25
    Short cut fiber felt 2.5 2.5 0.35
    Needling fibers Radius 0.2 mm 3.6
    下载: 导出CSV

    表  3  T700碳纤维力学性能[11,22]

    Table  3.   Mechanical properties of T700 carbon fiber[11,22]

    $ {E}_{1}^{\mathrm{f}} $/GPa$ {E}_{2}^{\mathrm{f}} $/GPa$ {\upsilon }_{12}^{\mathrm{f}} $$ {G}_{12}^{\mathrm{f}} $/GPa$ {G}_{23}^{\mathrm{f}} $/GPa$ {X}_{1}^{\mathrm{f}} $/MPa
    23018.220.2736.597.014900
    Notes:$ {E}_{1}^{\mathrm{f}} $ and $ {E}_{2}^{\mathrm{f}} $−Longitudinal and transverse tensile modulus of the carbon fiber; $ {\upsilon }_{12}^{\mathrm{f}} $−Longitudinal Poisson’s ratio of the carbon fiber;$ {G}_{12}^{\mathrm{f}} $ and $ {G}_{23}^{\mathrm{f}} $−Longitudinal and transverse shear modulus of the carbon fiber; $ {X}_{1}^{\mathrm{f}} $−Longitudinal tensile strength of the carbon fiber.
    下载: 导出CSV

    表  4  碳基体力学参数[15]

    Table  4.   Mechanical properties of carbon matrix[15]

    $ {E}^{\mathrm{m}} $/GPa$ {\upsilon }^{\mathrm{m}} $$ {\sigma }_{\mathrm{t}}^{\mathrm{m}} $/MPa$ {\sigma }_{\mathrm{c}}^{\mathrm{m}} $/MPa$ {\sigma }_{\mathrm{s}}^{\mathrm{m}} $/MPa
    150.2314.767.819.1
    Notes:$ {E}^{\mathrm{m}} $ and $ {\upsilon }^{\mathrm{m}} $−Modulus and Poisson’s ratio of the carbon matrix; $ {\sigma }_{\mathrm{t}}^{\mathrm{m}} $,$ {\sigma }_{\mathrm{c}}^{\mathrm{m}} $,$ {\sigma }_{\mathrm{s}}^{\mathrm{m}} $−Tensile, compressive and shear strength of the carbon matrix.
    下载: 导出CSV

    表  5  针刺C/C复合材料各区域材料参数[27]

    Table  5.   Material parameters in each region of needle punched C/C composites[27]

    Non-woven cloth (needling fibers)$ {E}_{11}^{\mathrm{L}} $/GPa$ {E}_{22}^{\mathrm{L}} $/GPa$ {G}_{12}^{\mathrm{L}} $/GPa$ {G}_{23}^{\mathrm{L}} $/GPa$ {\upsilon }_{12}^{\mathrm{L}} $$ {X}_{\mathrm{T}}^{\mathrm{L}} $/MPa
    57.80115.95011.2276.3340.234670.284
    $ {X}_{\mathrm{C}}^{\mathrm{L}} $/MPa$ {Y}_{\mathrm{T}}^{\mathrm{L}} $/MPa$ {Y}_{\mathrm{C}}^{\mathrm{L}} $/MPa$ {S}_{12}^{\mathrm{L}} $/MPa$ {G}^{\mathrm{f}} $/(N·mm-1)$ {G}^{\mathrm{m}} $/(N·mm-1)
    335.14210.79149.77211.89681
    Short cut fiber felt$ {E}^{\mathrm{S}} $/GPa$ {\upsilon }^{S} $$ {\sigma }^{\mathrm{S}} $/MPa
    11.2430.14620.7
    Interface$ {K}_{\mathrm{n}} $/(N·mm-3)$ {K}_{\mathrm{s}} $/(N·mm-3)$ {t}_{\mathrm{n}} $/MPa$ {t}_{\mathrm{s}} $/MPa$ {G}_{\mathrm{n}} $(N·mm-1)$ {G}_{\mathrm{s}} $(N·mm-1)
    10610613.818.011
    Notes:$ {E}_{11}^{\mathrm{L}} $ and $ {E}_{22}^{\mathrm{L}} $−Longitudinal and transverse tensile modulus of the non-woven cloth(needling fibers);$ {G}_{12}^{\mathrm{L}} $ and $ {G}_{23}^{\mathrm{L}} $−Longitudinal and transverse shear modulus of the non-woven cloth(needling fibers);$ {\upsilon }_{12}^{\mathrm{L}} $−Longitudinal Poisson’s ratio of the non-woven cloth(needling fibers);$ {X}_{\mathrm{T}}^{\mathrm{L}} $ and $ {X}_{\mathrm{C}}^{\mathrm{L}} $−Longitudinal tensile and compressive strength of the non-woven cloth(needling fibers);$ {Y}_{\mathrm{T}}^{\mathrm{L}} $ and $ {Y}_{\mathrm{C}}^{\mathrm{L}} $− Transverse tensile and compressive strength of the non-woven cloth(needling fibers);$ {S}_{12}^{\mathrm{L}} $−Longitudinal shear strength of the non-woven cloth(needling fibers); $ {G}^{\mathrm{f}} $ and $ {G}^{\mathrm{m}} $− Fracture energy of the fiber and the matrix; $ {E}^{\mathrm{S}} $−Tensile modulus of the short cut fiber felt; $ {\upsilon }^{S} $−Poisson’s ratio of the short cut fiber felt; $ {\sigma }^{\mathrm{S}} $−Tensile strength of the short cut fiber felt; $ {K}_{\mathrm{n}} $ and $ {K}_{\mathrm{s}} $−Stiffness of the interface in normal and tangential direction; $ {t}_{\mathrm{n}} $ and $ {t}_{\mathrm{s}} $−Strength of the interface in normal and tangential direction; $ {G}_{\mathrm{n}} $ and $ {G}_{\mathrm{s}} $−Fracture energy of the interface in normal and tangential direction.
    下载: 导出CSV

    表  6  针刺C/C复合材料模拟结果和拉伸试验结果对比

    Table  6.   Result comparison of the finite element method with the tensile test for needle punched C/C composites

    PropertyExperimental
    result/MPa
    Predicted
    value/MPa
    Error/%
    Modulus23783217368.61
    Strength88.6282.836.53
    下载: 导出CSV
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  • 收稿日期:  2022-01-06
  • 录用日期:  2022-03-03
  • 修回日期:  2022-02-23
  • 网络出版日期:  2022-03-19

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