多级金属波纹夹层结构的抗强动冲击特性

周睿; 岳增申; 徐轩; 王建强; 张钱城

doi:10.11883/bzycj-2023-0296

多级金属波纹夹层结构的抗强动冲击特性

doi: 10.11883/bzycj-2023-0296

西安交通大学航天航空学院复杂服役环境重大装备结构强度与寿命全国重点实验室，陕西西安 710049

基金项目: 国家自然科学基金（12072250）；

详细信息

作者简介:
周　睿（1997－　），女，硕士，ruizhou0505@foxmail.com

通讯作者:
张钱城（1977－　），男，博士，高级工程师，zqc111999@mail.xjtu.edu.cn

中图分类号: O347
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- 文章访问数: 251
- HTML全文浏览量: 62
- PDF下载量: 50
- 被引次数: 0
出版历程
- 收稿日期: 2023-08-17
- 修回日期: 2024-05-08
- 网络出版日期: 2024-05-09
- 刊出日期: 2024-11-15

Dynamic responses of metallic hierarchical corrugated sandwich beams under shock loadings

State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China

摘要

摘要: 为了研究采用多级夹层设计的金属多级波纹芯体夹层梁在泡沫子弹冲击下的动态力学行为，在验证数值方法可靠性的基础上，通过 Abaqus-Explicit 仿真分析了不同子弹动量水平下金属多级波纹芯体夹层梁的动态变形过程、定量挠度结果、变形破坏模式和能量吸收特性。进一步地，设计了3种不同几何参数的单层波纹夹层结构，比较了单层和多级波纹夹层结构在等质量条件下的抗冲击性能差异。结果表明，多级波纹夹层梁冲击侧夹层面板的二级波纹芯体和一级波纹芯体的压溃程度始终大于背侧夹层面板二级波纹芯体的压溃程度。多级波纹夹层梁背侧面板的最终跨中挠度始终小于等质量单级波纹夹层梁的相应挠度，体现出多级夹层梁的抗冲击防护性能优势。这种增强机理主要在于增加的多孔芯体压缩吸能保护了背侧面板，另外，多级夹层梁的塑性轴向拉伸强度几乎保持不变，而塑性弯曲强度因梁结构总厚度增加而增大，从而扩大了夹层结构的塑性屈服面。
- 多级设计 /
- 波纹夹层结构 /
- 泡沫子弹冲击 /
- 增强机理
Abstract: The dynamic mechanical behavior of a metallic hierarchical corrugated sandwich beam subjected to foam projectile impact was systematically studied. After verifying the reliability of the numerical method, the dynamic deformation evolution, quantitative deflection results, deformation failure modes, and energy absorption characteristics of the metallic hierarchical corrugated sandwich beam under different projectile momentum levels were analyzed using Abaqus-Explicit simulations. Subsequently, three metallic single-layer empty corrugated sandwich beams with different geometric parameters were designed, aiming to compare the shock resistance between single-layer and hierarchical corrugated sandwich beams under equal mass conditions. The results showed that the degree of crushing of the secondary corrugated core on the impact side and the first-order corrugated core of the hierarchical sandwich beam was always greater than that of the rear sandwich’s secondary corrugated core. The final mid-span deflection of the rear face of the hierarchical corrugated sandwich beam was always smaller than the corresponding deflection value of the equivalent mass single-level empty corrugated sandwich beam, demonstrating the superior impact protection performance of the hierarchical sandwich beam. This enhancement mechanism is mainly attributed to the increased energy absorption because of the added cellular cores, which protects the rear face sheet. Besides, the plastic longitudinal stretching strength of the hierarchical sandwich beam remains almost unchanged, while the plastic bending strength increases due to the increase in the total beam thickness, thereby enlarging the plastic yield surface of the sandwich structure.
- hierarchical design /
- corrugated sandwich structure /
- foam projectile impact /
- enhancement mechanisms

HTML全文

图 1 现实中的多级结构^[43-44]

Figure 1. Hierarchical structures in reality^[43-44]

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图 2 多级波纹夹层梁几何图示

Figure 2. Geometry of the hierarchical corrugated sandwich beam

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图 3 单级波纹夹层梁（左）和多级波纹夹层梁（右）泡沫子弹冲击有限元模型

Figure 3. Finite element model of foam projectile impact on the single-level empty corrugated sandwich beam (left) and the hierarchical corrugated sandwich beam (right)

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图 4 单级波纹夹层梁的前后面板跨中挠度时程曲线的结果可靠性验证

Figure 4. Validation of mid-span deflection time histories of impact and rear face sheets for single-level empty corrugated sandwich beam

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图 5 单级波纹夹层梁在不同子弹动量作用下前后面板最终跨中挠度值的数值仿真结果与实验结果对比

Figure 5. Comparison of numerical and experimental results for permanent mid-span deflection values of impact and rear face sheets of single-level empty corrugated sandwich beams under different projectile momentum

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图 6 单级波纹夹层梁在不同子弹动量作用下最终变形模式的数值仿真结果与实验结果对比

Figure 6. Comparison of numerical and experimental results for final deformation modes of single-level empty corrugated sandwich beams under different projectile momentum

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图 7 泡沫子弹冲击夹层结构的冲量传递过程

Figure 7. Impulse transfer process of foam projectile impacting sandwich structures

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图 8 模拟计算得到的多级波纹夹层梁在泡沫子弹冲击下的动态变形过程

Figure 8. Numerical simulated structural evolution of hierarchical corrugated sandwich beams under foam projectile impacts

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图 9 不同子弹初始动量水平下多级波纹夹层梁背侧面板跨中挠度时程曲线

Figure 9. Mid-span deflection time histories of the rear face of hierarchical corrugated sandwich beams under different projectile initial momentum

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图 10 不同子弹初始动量下多级波纹夹层梁（HCB）和两种不同厚度面板的单级波纹夹层梁（ECB）最终跨中挠度

Figure 10. Mid-span deflection of the hierarchical corrugated sandwich beam (HCB) and two kinds of single-level empty corrugated sandwich beams with different face thicknesses (ECB) impacted by projectiles with different momentum

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图 11 梁ECB-S1（左）和ECB-S2（右）的几何图例

Figure 11. Geometry of ECB-S1 (left) and ECB-S2 (right)

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图 12 不同子弹初始动量下多级波纹夹层梁（HCB）和等质量等梁高单级波纹夹层梁（ECB）的最终跨中挠度

Figure 12. Mid-span deflection of the hierarchical corrugated sandwich beam (HCB) and two kinds of single-level empty corrugated sandwich beams with the mass and beam height same to the HCB (ECB) impacted by projectiles with different momentum

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图 13 多级波纹夹层梁在不同动量水平冲击条件下的最终变形破坏模式

Figure 13. Final deformation modes of hierarchical corrugated sandwich beams under different projectile momentum

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图 14 多级波纹夹层梁各部件最终塑性应变能及能量比率对比

Figure 14. Final plastic strain energy and energy ratio of each part of hierarchical corrugated sandwich beams

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表 1 多级波纹夹层结构几何尺寸

Table 1. Geometric parameters of the hierarchical sandwich beam

L/mm W/mm l_c1/mm l_p1/mm t_c1/mm α₁/(°) l_c2/mm l_p2/mm t_c2/mm α₂/(°) t_f2/mm

300 60 20 5 0.5 60 8 2 0.5 60 0.5

下载: 导出CSV

表 2 单层波纹夹层梁ECB-S1和ECB-S2的几何参数

Table 2. The geometry parameters of the empty corrugated sandwich beams ECB-S1 and ECB-S2

梁 l_p/mm l_c/mm t_c/mm α/(°) t_f/mm

ECB-S1 9.12 36.46 2.10 60 0.5

ECB-S2 5.00 34.88 1.31 73.34 0.5

下载: 导出CSV

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