弧边内凹蜂窝负泊松比结构的面内冲击动力学数值研究

尤泽华; 肖俊华

doi:10.6052/j.issn.1000-4750.2021.07.0572

弧边内凹蜂窝负泊松比结构的面内冲击动力学数值研究

doi: 10.6052/j.issn.1000-4750.2021.07.0572

尤泽华^{1, 2,},
肖俊华^{1, 2, ,}

1.
燕山大学工程力学系，秦皇岛 066004
2.
燕山大学河北省重型装备与大型结构力学可靠性重点实验室，秦皇岛 066004

基金项目: 河北省高等学校科学技术研究重点项目(ZD2021104)

详细信息

作者简介:
尤泽华(1995−)，男，河北人，硕士，主要从事机械超材料力学性能研究 (E-mail: 739205065@qq.com)

通讯作者:
肖俊华(1981−)，男，河南人，教授，博士，主要从事复合材料力学和断裂力学研究 (E-mail: xiaojunhua@ysu.edu.cn)

中图分类号: O342；TB383
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- 被引次数: 0
出版历程
- 收稿日期: 2021-07-26
- 录用日期: 2021-12-10
- 修回日期: 2021-11-15
- 网络出版日期: 2021-12-10
- 刊出日期: 2022-12-01

NUMERICAL STUDY ON IN-PLANE IMPACT DYNAMICS OF CONCAVE HONEYCOMB STRUCTURE WITH NEGATIVE POISSON'S RATIO

YOU Ze-hua^{1, 2
,},
XIAO Jun-hua^{1, 2
, ,}

1.
Department of Engineering Mechanics, Yanshan University, Qinhuangdao 066004, China
2.
Hebei Key Laboratory of Mechanical Reliability for Heavy Equipments and Large Structures, Yanshan University, Qinhuangdao 066004, China

摘要

摘要: 该文数值研究了一种可变弧边内凹多胞蜂窝负泊松比结构的面内冲击动力学性能，讨论了胞元弧角和冲击速度对结构的变形失效模式、动力响应曲线、能量吸收特性和平台应力特征的影响。研究表明：冲击过程结构中出现旋转位移，胞元发生扭曲变形；结构变形受胞元弧角的影响，胞元弧角取值不同时结构具有不同的面内冲击失效模式；冲击过程中应力-应变曲线包括初始阶段、稳定阶段和锁定阶段，最终结构进入密实化阶段；结构的体能量吸收值和平台应力受冲击速度和胞元弧角的影响显著。
- 负泊松比 /
- 曲边内凹蜂窝结构 /
- 面内变形失效模式 /
- 能量吸收率 /
- 平台应力
Abstract: The in-plane impact dynamic performance of a variable angular curved concave side multi cell honeycomb structure with negative Poisson's ratio is studied numerically. The effects of the arc angle and of impact velocity on the deformation failure mode, on the dynamic response curve, on the energy absorption characteristics and on the platform stress characteristics of the structure are discussed. The study results show that rotational displacement occurs in the structure and the cells are distorted during the impact. The deformation of the structure is affected by the arc angle of the cell. When the arc angle is different, the structure has different in-plane impact failure modes. During the impact process, the stress-strain curve includes an initial stage, a stable stage and a locking stage, and finally the structure enters a compaction stage. The energy absorption rate and the platform stress of the structure are significantly affected by the impact velocity and by the arc angle of the cell.
- negative poisson's ratio /
- concave honeycomb structure with curved side /
- in-plane deformation failure mode /
- energy absorption rate /
- platform stress

HTML全文

图 1 弧边内凹蜂窝胞元^[29]

Figure 1. Concave honeycomb cell with arc side^[29]

下载: 全尺寸图片幻灯片

图 2 相对密度计算示意图

Figure 2. Schematic diagram of relative density calculation

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图 3 冲击动力学结构模型

Figure 3. Structural model of impact dynamics

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图 4 边界条件和施加载荷示意图

Figure 4. Schematic diagram of boundary conditions and load conditions

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图 5 30°弧角胞元结构冲击变形模式

Figure 5. Impact deformation mode of 30 degree arc angle cellular structure

下载: 全尺寸图片幻灯片

图 6 90°弧角胞元结构冲击变形模式

Figure 6. Impact deformation mode of 90 degree arc angle cellular structure

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图 7 胞元冲击变形模式

Figure 7. Deformation mode of the cell under impact

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图 8 结构的冲击变形模式

Figure 8. Impact deformation modes of the structure

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图 9 不同冲击速度和弧角时应力-应变曲线

Figure 9. Stress-strain curves under different impact velocity and angle

下载: 全尺寸图片幻灯片

图 10 不同冲击速度和弧角时体能量吸收值曲线

Figure 10. Curves of volumetric energy absorptivity under different impact velocity and angle

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图 11 平台应力随冲击速度的变化曲线

Figure 11. Variation of platform stress with impact velocity

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图 12 平台应力随胞元弧角的变化曲线

Figure 12. Variation of platform stress with cell angle

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表 1 材料属性^[31]

Table 1. Material properties^[31]

弹性模量E/GPa	密度ρ/(kg/m³)	泊松比ν	屈服应力σ/MPa
69	2700	0.33	76

下载: 导出CSV

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