预折纹管在低速冲击载荷作用下的能量吸收

王博; 周才华; 由衷

doi:10.11883/1001-1455(2015)04-0473-09

预折纹管在低速冲击载荷作用下的能量吸收

doi: 10.11883/1001-1455(2015)04-0473-09

王博^{1, 2,},
周才华^{1, 2},
由衷³

1.
大连理工大学工业装备结构分析国家重点实验室，辽宁大连 116024
2.
大连理工大学工程力学系，辽宁大连 116024
3.
牛津大学科学工程系，英国牛津 OX13PJ

基金项目: 国家自然科学基金项目(11128205, 11372062)；国家重点基础研究发展计划(973计划)项目(2014CB049000)；高等学校学科创新引智计划项目(B14013)；辽宁省高等学校优秀人才支持计划项目(LJQ2013005)

详细信息

作者简介:
王博(1978-), 男, 博士, 教授, wangbo@dlut.edu.cn

中图分类号: O381
计量
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- 被引次数: 0
出版历程
- 收稿日期: 2013-11-29
- 修回日期: 2014-03-05
- 刊出日期: 2015-08-10

Energy absorption of pre-folded origami under low speed impact

Wang Bo^{1, 2
,},
Zhou Cai-hua^{1, 2},
You Zhong³

1.
Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, Liaoning, China
2.
State Kay Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, Liaoning, China
3.
Department of Engineering Science, University of Oxford, Oxford OX13PJ, UK

摘要

摘要: 为了降低结构的初始载荷、增加有效塑性变形面积，进而提高其吸能效率，研究一种以新型的预折纹管，在普通管的管壁上引入特别设计的折角。基于有限元软件ABAQUS/EXPLICIT的数值分析验证了预折纹在低速冲击载荷作用下可以引导预期的大变形模式，预折纹管的这种大变形模式相较于普通方管的对称变形模式有更低峰值载荷和更高的平均载荷。通过低速落锤实验获得了与有限元模拟结果相似的载荷-位移曲线和变形模式，验证了数值结果的可信性和预折纹方管的高效吸能特点。
- 固体力学 /
- 能量吸收 /
- 低速冲击实验 /
- 薄壁结构 /
- 耐撞式设计
Abstract: A new type of creased square tube specifically designed with some folded lobes added at the wall of ordinary square tube is studied inorder not only to reduce the initial loading, but also to enhance the effective plastic area distortion which leads to a higher energy absorption efficiency. The numerical results based on the FEM package ABAQUS /EXPLICIT verify that the pre-folds could lead the pre-folded origami to the expected large deformation mode under low speed impact, which effectively reduce the peak load and also improve the average load of load-displacement curve compared with ordinary square tubes. The load-displacement curve obtained by FEM is identical to the results of low droped hammer test, which verifies the credibility of the numerical results as well as the high energy absorption characteristics of the tube.
- solid mechanics /
- energy absorption /
- low droped hammer test /
- thin-walled structure /
- crashworthiness design

HTML全文

图 1 预折纹管模型

Figure 1. Model of pre-folded tube

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图 2 材料测试

Figure 2. Material tensile test

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图 3 网格收敛性验证

Figure 3. Convergence tests

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图 4 数值模拟变形模式

Figure 4. Shape change patterns via simulation

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图 5 数值模拟塑性变形云图

Figure 5. Plastic zone via simulation

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图 6 预折纹管与普通方管模拟结果对比

Figure 6. Numerical comparison between the pre-folded tube and the ordinary squeare tube

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图 7 预折纹管的制作流程

Figure 7. The pre-folded tube manufacturing process

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图 8 落锤式冲击试验机

Figure 8. The machine for falling weight impact test

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图 9 预折纹管的实验与数值对比

Figure 9. Comparison between the falling weight impact test result and the numerical simulation result

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图 10 预折纹管变形前后对比

Figure 10. Comparison of the pre-folded tube before and after deformation

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图 11 预折纹管和普通方管实验结果对比

Figure 11. Comparison between the pre-folded tube and the ordinary square tube

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表 1 普通方管和预折纹管的比较结果

Table 1. Comparison result between the pre-folded origami and the ordinary square tube

结构	F_p/kN	S²/kN²	F_m/kN	η_CFE
普通方管(数值)	45.99	24.63	14.47	0.31
普通方管(实验)	88.86	46.78	15.41	0.17
预折纹管(数值)	25.40	12.25	19.85	0.78
预折纹管(实验)	27.77	14.61	20.83	0.75

下载: 导出CSV

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