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仿生螺旋结构复合材料动态断裂行为的实验研究和数值模拟

王瑜 武晓东 安连浩 王可

王瑜, 武晓东, 安连浩, 等. 仿生螺旋结构复合材料动态断裂行为的实验研究和数值模拟[J]. 复合材料学报, 2022, 39(0): 1-11
引用本文: 王瑜, 武晓东, 安连浩, 等. 仿生螺旋结构复合材料动态断裂行为的实验研究和数值模拟[J]. 复合材料学报, 2022, 39(0): 1-11
Yu WANG, Xiaodong WU, Lianhao AN, Ke WANG. Experimental study and numerical simulation of dynamic fracture behavior of biomimetic spiral structured composite[J]. Acta Materiae Compositae Sinica.
Citation: Yu WANG, Xiaodong WU, Lianhao AN, Ke WANG. Experimental study and numerical simulation of dynamic fracture behavior of biomimetic spiral structured composite[J]. Acta Materiae Compositae Sinica.

仿生螺旋结构复合材料动态断裂行为的实验研究和数值模拟

基金项目: 国家自然科学基金(11702185);山西省高校创新科技资助计划(173230113-S)
详细信息
    通讯作者:

    武晓东,博士,副教授,硕士生导师,研究方向为复合材料动力学 E-mail:wuxiaodong@tyut.edu.cn

  • 中图分类号: O347.3

Experimental study and numerical simulation of dynamic fracture behavior of biomimetic spiral structured composite

  • 摘要: 通过三点弯动态冲击实验和数值模拟,研究了仿生螺旋结构复合材料的动态断裂韧性,该结构是基于Bouligand结构设计的仿生复合结构。首先使用软硬两种基体通过3D打印技术制备了8组不同角度的试样,使用改进的分离式Hopkinson杆完成了动态三点弯冲击实验,得到了试样的位移-载荷曲线,起裂时间和起裂功,并对试样最终断裂形态进行分析。随后在ABAQUS软件中完成了试样断裂全过程的数值模拟,对裂纹的萌生和扩展过程进行了分析。实验和数值模拟结果都表明螺旋角对试样的断裂韧性有很大的影响,在螺旋角度0°~75°的范围内,随着角度的增加试样的断裂韧性增强,而螺旋角度为90°时试样的断裂韧性急剧下降。实验过程中观察到试样在动态断裂过程中存在裂纹偏转现象。最后考察了裂纹偏转对动态断裂的影响机制,结果显示裂纹偏转改变了复合材料的局部断裂模式,增加了断裂面积,从而提升了材料的断裂韧性。

     

  • 图  1  仿生螺旋结构复合材料试样的结构和尺寸

    Figure  1.  Structure and size of bionic spiral structure composite material sample

    图  2  改进的分离式Hopkinson杆系统原理图

    Figure  2.  Schematic diagram of the improved split Hopkinson rod system

    1— Bullet; 2—Incident rod; 3—Group I strain gauge; 4—Sample; 5—Group II strain gauge; 6—Fixture; 7—Strain gauge; 8—Oscilloscope; 9—Beam laser speedometer

    图  3  II组应变片信号

    Figure  3.  Strain gauge signal of group II

    图  4  起裂功

    Figure  4.  Crack initiation work

    图  5  不同角度仿生螺旋结构复合材料试样的载荷-位移曲线

    Figure  5.  Load-displacement curve of sample of bionic spiral structure composite material with different angles

    图  6  不同角度仿生螺旋结构复合材料试样的断裂功

    Figure  6.  Fracture work of sample of bionic spiral structure composite material with different angles

    图  7  不同角度仿生螺旋结构复合材料试样的裂纹扩展:(a)γ=0°;(b) γ=45°;(c)γ=60°;(d) γ=75°

    Figure  7.  Crack growth of sample of bionic spiral structure composite material with different angles: (a)γ=0°; (b) γ=45°; (c)γ=60°; (d) γ=752

    图  8  仿生螺旋结构复合材料有限元模型

    Figure  8.  Finite element model of bionic spiral structure composite material

    图  9  仿生螺旋结构复合材料拉伸应力-应变曲线:(a)硬质基体;(b)软质基体

    Figure  9.  Tensile stress-strain curves of bionic spiral structure composite material: (a) Stiff; (b) Soft

    图  10  仿生螺旋结构复合材料压缩应力-应变曲线:(a)硬质基体;(b)软质基体

    Figure  10.  Compressive stress-strain curves of bionic spiral structure composite material: (a) Stiff; (b) Soft

    图  11  仿生螺旋结构复合材料和硬质基体纯材料的实验和数值模拟的时间-载荷对比

    Figure  11.  Time-load comparison of experimental and numerical simulation of bionic spiral structure composite material and hard matrix pure material

    图  12  螺旋角75°仿生复合材料试样的实验和模拟裂纹扩展对比

    Figure  12.  Comparison of experimental and simulated crack growth of biomimetic composite samples with a helix angle of 75°

    图  13  数值模拟中不同角度仿生螺旋结构复合材料试样的时间-载荷曲线

    Figure  13.  Numerical simulation of time-load curves of sample of bionic spiral structure composite material with different angles

    图  14  不同角度仿生螺旋结构复合材料试样的裂纹扩展过程

    Figure  14.  Crack growth process of sample of bionic spiral structure composite material with different angles

    图  15  不同角度仿生螺旋结构复合材料试样的起裂时间

    Figure  15.  Crack initiation time of sample of bionic spiral structure composite material with different angles

    图  16  螺旋角75°仿生螺旋结构复合材料试样的裂纹扩展

    Figure  16.  Crack growth of sample of bionic spiral structure composite material with a helix angle of 75°

    图  17  不同角度仿生螺旋结构复合材料试样的断裂失效体积和断裂能

    Figure  17.  Fracture failure volume and fracture energy of sample of bionic spiral structure composite material with different angles

    图  18  螺旋角75°仿生螺旋结构复合材料的应力分布:(a)拉伸应力;(b)剪应力

    Figure  18.  Stress distribution of sample of bionic spiral structure composite material with a helix angle of 75°: (a) Tensile stress; (b) Shear stress

    图  19  螺旋角90°仿生螺旋结构复合材料的应力分布:(a)拉伸应力;(b)剪应力

    Figure  19.  Stress distribution of sample of bionic spiral structure composite material with a helix angle of 90°: (a) Tensile stress; (b) Shear stress

    图  20  螺旋角75°仿生螺旋结构复合材料的层间裂纹扩展

    Figure  20.  Interlaminar crack growth of sample of bionic spiral structure composite material with a helix angle of 75°

    图  21  螺旋角75°仿生螺旋结构复合材料各层层间的时间-剪应力曲线

    Figure  21.  Time-shear stress curve between each layer of the bionic spiral structure composite material with a helix angle of 75°

    图  22  螺旋角75°仿生螺旋结构复合材料各层层间的时间-拉伸应力曲线

    Figure  22.  Time-tensile stress curve between each layer of the bionic spiral structure composite material with a helix angle of 75°

    表  1  软质基体Tango Plus和硬质基体VeroWhite Plus材料参数

    Table  1.   Material parameters of stiff Tango Plus and soft VeroWhite Plus

    MaterialVeroWhite PlusTango Plus
    Density/(g·cm−3)1.181.13
    Energy dissipation ratio/%33.4 ±2.499.5 ±3.7
    Flexural stiffness/(kN·mm−1)1.08 ±0.110.0167 ±0.0064
    Response time/ms0.48 ±0.12~2000
    Maximum force at break/kN1.76 ±0.780.109 ±0.059
    Maximum displacement/mm1.57 ±0.3127.3 ±3.1
    Maximum velocity without failure/(m·s−1)3.453.40
    Maximum energy without failure $ m{V}_{\mathrm{i}\mathrm{n}\mathrm{i}}^{2}/2 $/J1.991.95
    Minimum velocity with failure/(m·s−1)3.503.62
    Energy absorption with failure $\left(\dfrac{m{V}_{\mathrm{i}\mathrm{n}\mathrm{i} }^{2} }{2}-\dfrac{m{V}_{\mathrm{r}\mathrm{e}\mathrm{s} }^{2} }{2}\right)$/J1.952.19
    下载: 导出CSV

    表  2  硬质基体和软质基体力学性能

    Table  2.   Mechanical parameters of stiff matrix and soft matrix

    MaterialStiffSoft
    Density/(g·mm−3)1.21.1
    Young’s modulus/MPa3000300
    Poisson’s ratio0.30.3
    Failure stress/MPa1000
    Failure strain/MPa01.4
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-10-26
  • 录用日期:  2022-01-05
  • 修回日期:  2021-12-19
  • 网络出版日期:  2022-02-12

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