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基于功能原理的Gyroid点阵结构塑性屈服强度研究

吴凤和 王超世 孙迎兵 刘磊 张同庆 王朝华

吴凤和, 王超世, 孙迎兵, 等. 基于功能原理的Gyroid点阵结构塑性屈服强度研究[J]. 复合材料学报, 2024, 42(0): 1-11.
引用本文: 吴凤和, 王超世, 孙迎兵, 等. 基于功能原理的Gyroid点阵结构塑性屈服强度研究[J]. 复合材料学报, 2024, 42(0): 1-11.
WU Fenghe, WANG Chaoshi, SUN Yingbing, et al. Study on plastic yield strength of gyroid lattice structures based on functional principleson[J]. Acta Materiae Compositae Sinica.
Citation: WU Fenghe, WANG Chaoshi, SUN Yingbing, et al. Study on plastic yield strength of gyroid lattice structures based on functional principleson[J]. Acta Materiae Compositae Sinica.

基于功能原理的Gyroid点阵结构塑性屈服强度研究

基金项目: 国家自然科学基金(52205278);山西省基础研究计划资助项目(202103021223290)
详细信息
    通讯作者:

    王朝华,博士,副教授,硕士生导师,研究方向为点阵结构性能调控与优化、结构轻量化设计 E-mail: wangzhaohua@tyust.edu.cn

  • 中图分类号: TB39

Study on plastic yield strength of gyroid lattice structures based on functional principleson

Funds: National Natural Science Foundation of China (52205278); Fundamental Research Program of Shanxi Province (202103021223290)
  • 摘要: 点阵结构与密实结构存在的力学性能差异之一表现在塑性屈服响应上,因此,研究其屈服行为可为点阵结构的设计和应用提供重要的理论依据。首先,对Gyroid点阵结构进行简化,并基于变形体功能原理建立其力学模型,得到Gyroid点阵结构塑性屈服强度与体积分数之间的映射关系;然后,基于有限元分析软件Abaqus对Gyroid点阵结构准静态压缩过程开展仿真实验,初步验证理论模型的准确性;最后,通过选择性激光熔化(Selective Laser Melting,SLM)制备不同体积分数316L不锈钢Gyroid点阵结构,进行单轴压缩实验,分析其变形机制与力学性能。结果表明,理论推导、有限元仿真结果与实验结果相比,误差在25%以内,且根据三种方法结果拟合得到的Gibson-Ashby模型系数具有较好的一致性,表明本文基于理论推导建立的Gyroid点阵结构塑性屈服强度预测模型的有效性。理论模型的构建方法可以转化到其他复杂类型点阵结构中,为快速核算点阵结构力学性能,并将其应用在工程装备中提供理论依据。

     

  • 图  1  Gyroid点阵结构设计与制造示意图

    Figure  1.  Schematic diagram of Gyroid lattice structure design and manufacturing

    图  2  Gyroid点阵结构晶胞简化示意图

    Figure  2.  Simplified schematic diagram of Gyroid lattice structure cell

    图  3  Gyroid晶胞受力分析

    Figure  3.  Analysis of Gyroid crystal cell stress

    图  4  316 L不锈钢应力-应变曲线

    Figure  4.  Stress strain curve of 316 L stainless steel

    图  5  压缩模拟载荷与边界条件

    Figure  5.  Compression simulation load and boundary conditions

    图  6  不同单元尺寸的模型收敛性分析

    Figure  6.  Convergence analysis of models with different element sizes

    图  7  有限元模拟获得的Gyroid点阵结构应力-应变曲线

    Figure  7.  The stress-strain curve of Gyroid lattice structure obtained from finite element simulation

    图  8  Gyroid点阵结构应力/应变云图

    Figure  8.  Stress/strain distribution of Gyroid lattice structure

    图  9  Gyroid点阵结构宏观形貌

    Figure  9.  Macro morphology of Gyroid lattice structure

    图  10  Gyroid点阵结构尺寸测量

    Figure  10.  Measurement of Gyroid lattice structure dimensions

    图  11  Gyroid点阵结构理论与实测尺寸对比

    Figure  11.  Comparison of theoretical and actual dimensions of Gyroid lattice structure

    图  12  Gyroid点阵结构理论与实测质量对比

    Figure  12.  Comparison of theoretical and actual mass of Gyroid lattice structure

    图  13  Gyroid点阵结构表面微观形貌

    Figure  13.  Microscopic morphology of Gyroid lattice structure surface

    图  14  Gyroid点阵结构压缩实验过程

    Figure  14.  Experimental process of Gyroid lattice structure compression

    图  15  Gyroid点阵结构压缩变形机制

    Figure  15.  Compression deformation mechanism of Gyroid lattice structure

    图  16  压缩实验获到的Gyroid点阵结构应力-应变曲线

    Figure  16.  The stress-strain curve of Gyroid lattice structure obtained from compression experiments

    图  17  简化前后Gyroid点阵结构体积分数对比

    Figure  17.  Comparison of volume fractions of Gyroid lattice structures before and after simplification

    图  18  Gyroid点阵结构塑性屈服强度Gibson-Ashby拟合

    Figure  18.  Gibson-Ashby fitting of plastic yield strength of Gyroid lattice structure

    表  1  Gyroid点阵结构理论推导、有限元和实验结果对比

    Table  1.   Theoretical derivation, comparison of finite element and experimental results of Gyroid lattice structure

    Volume fraction/% Plastic yield strength/MPa
    Theoretical derivation Finite element analysis Experimental
    5 1.48 1.78 1.83
    7.5 2.72 3.40 3.48
    10 4.19 4.72 4.97
    12.5 5.85 6.71 6.86
    15 7.69 8.36 9.18
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出版历程
  • 收稿日期:  2023-11-20
  • 修回日期:  2024-01-12
  • 录用日期:  2024-01-23
  • 网络出版日期:  2024-02-29

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