爆炸载荷作用下具有可折叠芯层夹芯梁的动态响应

张培文; 李世强; 王志华; 赵隆茂

doi:10.11883/bzycj-2017-0017

爆炸载荷作用下具有可折叠芯层夹芯梁的动态响应

doi: 10.11883/bzycj-2017-0017

张培文¹,
李世强^{1, 2, 3},
王志华^{1, 3, ,},
赵隆茂^{1, 3}

1.
太原理工大学力学学院, 山西太原 030024
2.
湖南大学汽车车身先进设计制造国家重点实验室, 湖南长沙 410082
3.
太原理工大学材料强度与结构冲击山西省重点实验室, 山西太原 030024

基金项目:

国家自然科学基金项目 11572214

山西省自然科学基金项目 2013011005-2

汽车车身先进设计制造国家重点实验室开放基金资助项目 31615008

详细信息

作者简介:
张培文(1985—)，男，博士研究生

通讯作者:
王志华, wangzh077@163.com

“第十一届全国爆炸力学学术会议”推荐论文
中图分类号: O383.2
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出版历程
- 收稿日期: 2017-01-13
- 修回日期: 2017-03-22
- 刊出日期: 2018-01-25

Dynamic response of sandwich beam with foldable core under blast loading

ZHANG Peiwen¹,
LI Shiqiang^{1, 2, 3},
WANG Zhihua^{1, 3
, ,},
ZHAO Longmao^{1, 3}

1.
Institute of Applied Mechanics and Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
2.
State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, Hunan, China
3.
Shanxi Key Laboratory of Material Strength and Structural Impact, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China

摘要

摘要: 基于目前研究最广泛的刚性折纸(Tachi-origami)样式，通过改变其初始折叠角度构建出4种不同的蜂窝胞元，并且通过排列分布将其组成夹芯梁。采用商用有限元软件Abaqus/explicit对准静态和爆炸载荷作用下可折叠芯层夹芯梁的力学响应进行研究，分析可折叠芯层的泊松比变化规律、夹芯梁背板挠度以及能量吸收机理；并将夹芯梁与等质量的实体梁进行对比。采用后面板最大挠度作为抗爆性能的评价，结果发现：可折叠芯层在准静态载荷下具有一定的负泊松比效应；夹芯梁的抗爆性能优于实体梁，曲边蜂窝的初始折角对其作为芯层夹芯梁的抗爆性能有较大影响，随着初始折角的逐渐增大，其抗爆性能逐渐下降；当初始折角为直角时对应于方孔直边蜂窝，其抗爆性能最差。
- 可折叠曲边蜂窝 /
- 夹芯梁 /
- 动态响应 /
- 能量吸收
Abstract: In this study four different honeycomb cells were fabricated by changing the original folding angle based on the Tachi-origami pattern that is at present being studied widely, and sandwich beams were made from them by arranging them specifically. The quasi-static mechanical response of the foldable core and dynamic response of the sandwich beam with different foldable core shapes was investigated using the commercial package ABAQUS/explicit. The out-plane Poisson ratio's variation of the foldable core, the back-sheet deflection and the plastic dissipation energy of the sandwich beam were analyzed and compared with the monolithic beam. The anti-explosive performance of the sandwich beams was evaluated by the maximum deflection of the back-sheet. The results show that there is a negative Poisson ratio's performance of the foldable core under quasi-static loading. The blast resistance of the sandwich beam is better than that of the monolithic one. The effect of the original folding angle on the dynamic response is very obvious for the curved web honeycomb. The blast-resistant performance decreases gradually as the original folding angle increases. The blast resistance of the sandwich beam with a straight web honeycomb core is comparatively the worst among the four honeycomb cores.
- foldable curved web honeycomb /
- sandwich beam /
- dynamic response /
- energy absorption
注释:

1) “第十一届全国爆炸力学学术会议”推荐论文

HTML全文

图 1 折痕样式布置图

Figure 1. Sketch of the origami creases' tessellations

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图 2 折叠胞元几何示意图

Figure 2. Sketch of unit cell's geometries

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图 3 有限元模拟示意图

Figure 3. Sketch of finite element model

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图 4 爆炸载荷作用下夹芯梁的示意图

Figure 4. Sketch of sandwich beam under blast loading

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图 5 Von Mises应力分布图

Figure 5. Distribution of Von Mises stress

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6(a) 单轴压缩下折叠芯层OC-1面外泊松比变化

6(a). Variation of out-plane Possion's ratio under uniaxial compression for OC-1 foldable core

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6(b) 单轴压缩下折叠芯层OC-2面外泊松比变化

6(b). Variation of out-plane Possion's ratio under uniaxial compression for OC-2 foldable core

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6(c) 单轴压缩下折叠芯层OC-3面外泊松比变化

6(c). Variation of out-plane Possion's ratio under uniaxial compression for OC-3 foldable core

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图 7 准静态单轴压缩下的名义应力应变曲线

Figure 7. Uniaxial stress-strain curve under quasi-static compression

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图 8 低碳钢方板中心挠度

Figure 8. Deflection at square plate center for low carbon steel

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图 9 实体梁与夹芯梁(OC-1)挠度和塑性耗散能时程曲线

Figure 9. Histories of deflection and plastic dissipation energy for sandwich and monolithic beam

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图 10 实体梁与夹芯梁(OC-1)挠度和塑性耗散能与比距离关系

Figure 10. Variation of deflection and energy dissipation with specific distance for sandwich and monolithic beams

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图 11 不同芯层夹芯梁挠度和塑性耗散能时程曲线

Figure 11. Histories of deflection and plastic dissipation energy for sandwich beams with different honeycomb cores

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图 12 不同比距离下4种芯层夹芯梁挠度和塑性耗散能对比

Figure 12. Variation of deflection and energy dissipation with specific distance for different sandwich beams

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表 1 不同蜂窝胞元夹芯梁的几何参数

Table 1. Geometry parameters of different honeycomb core cells

折叠芯层	l/mm	D/mm	α/(°)	β/(°)	γ/(°)	θ/(°)	W/mm	H/mm	L/mm
OC-1	13.66	27.32	45.00	35.27	90.00	60.00	40.98	66.92	725.56
OC-2	11.13	19.28	60.00	26.57	90.00	75.53	40.98	67.69	725.56
OC-3	10.00	19.36	75.00	14.51	90.00	86.16	40.98	67.77	725.56
OC-4	9.66	22.59	90.00	0	90.00	90.00	40.98	67.77	725.56

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