横向冲击载荷下泡沫铝夹芯双圆管的吸能研究

doi:10.3969/j.issn.1000-1093.2017.11.024

兵工学报 ›› 2017, Vol. 38 ›› Issue (11): 2259-2267.doi: 10.3969/j.issn.1000-1093.2017.11.024

横向冲击载荷下泡沫铝夹芯双圆管的吸能研究

刘志芳¹，王军¹，秦庆华²

（1.太原理工大学应用力学与生物医学工程研究所，山西太原 030024；2.西安交通大学机械结构强度与振动国家重点实验室，陕西西安 710049）

收稿日期:2017-01-10 修回日期:2017-01-10 上线日期:2018-01-03
作者简介:刘志芳（1971—），女，副教授，硕士生导师。E-mail: liuzhifang@tyut.edu.cn
基金资助:
国家自然科学基金项目（11772216、11372235、11572234）；国家自然科学基金创新研究群体项目（11321062）

Research on Energy Absorption of Aluminum Foam-filled Double Circular Tubes under Lateral Impact Loadings

LIU Zhi-fang¹， WANG Jun¹， QIN Qing-hua ²

（1.Institute of Applied Mechanics and Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi， China；2.State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an 710049, Shaanxi， China）

Received:2017-01-10 Revised:2017-01-10 Online:2018-01-03

摘要/Abstract

摘要： 采用数值模拟的方法研究了在横向冲击载荷作用下，泡沫铝夹芯双圆管结构的变形模态与吸能性能。分析了泡沫铝夹芯双圆管结构的几何参数、芯层材料的相对密度与冲击速度对其力学行为的影响。结果表明：冲击初始时刻，夹芯双圆管的冲击端由于塑性变形而吸收了大部分能量，之后主要依靠左右两端的弯曲变形来吸收能量；横向冲击载荷作用下，泡沫铝夹芯双圆管的比吸能随着外管直径与内管壁厚的增加或者泡沫铝芯层厚度的增加而增加；而随着外管壁厚与内管直径的增加，泡沫铝夹芯双圆管的比吸能减小；冲击速度小于30 m/s时，夹芯双圆管呈上下、左右对称的变形模态；大于此速度时，呈左右对称的变形模态，夹芯双圆管的比吸能随着冲击速度的增大而增大；芯层材料的相对密度越大，夹芯双圆管结构的比吸能也越大。

关键词: 固体力学, 双圆管, 泡沫铝, 横向冲击载荷, 比吸能

Abstract: The deformation modes and energy absorption of aluminum foam-filled double circular tubes under lateral impact loadings are studied using numerical simulation method. The influences of geometrical parameters of the structure, relative density of foam aluminum material and impact velocities on the mechanical behaviors of structures are analyzed. The simulated results show that the plastic deformation of impact component absorbs the most of energy at the initial moment, and then the plastic bending deformations of the left and right components absorb energy. The specific energy absorption (SEA) of aluminum foam-filled double circular tubes increases with the increase in the diameter of outer tube and the wall thickness of inner tube or the thickness of aluminum foam core. However, the SEA decreases with the increase in the wall thickness of outer tube and the diameter of inner tube. When the impact velocity is less than 30 m/s, the deformation mode is vertically and horizontally symmetrical. The deformation mode is only horizontally symmetrical when the impact velocity is larger than 30 m/s. It can be found that the SEAs of sandwich tubes increase with the increase in the impact velocity. The larger the relative density of aluminum foam core is, the more the SEAs of aluminum foam-filled double circular tubes are. Key

Key words: solidmechanics, doublecirculartube, foamaluminum, lateralimpactloading, specificenergyabsorption

中图分类号:

O347.3

刘志芳，王军，秦庆华. 横向冲击载荷下泡沫铝夹芯双圆管的吸能研究[J]. 兵工学报, 2017, 38(11): 2259-2267.

LIU Zhi-fang， WANG Jun， QIN Qing-hua. Research on Energy Absorption of Aluminum Foam-filled Double Circular Tubes under Lateral Impact Loadings[J]. Acta Armamentarii, 2017, 38(11): 2259-2267.

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横向冲击载荷下泡沫铝夹芯双圆管的吸能研究

Research on Energy Absorption of Aluminum Foam-filled Double Circular Tubes under Lateral Impact Loadings

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