摘要
建立了泡沫铝填充薄壁方管的有限元模型,利用试验对泡沫铝填充薄壁方管的有限元模型的准确性进行了验证。研究了诱导结构的类型和数量对泡沫铝填充薄壁方管的轴向压溃变形模式、初始峰值力、压溃力效率和能量吸收能力的影响,结果表明:设计诱导结构可以提高能量吸收能力、减小初始峰值力、增加压溃力效率,甚至可以改变压溃变形模式。沿薄壁方管的轴向方向合理地增加诱导结构的数量,可以进一步的减小初始峰值力、增加压溃力效率、提高结构的能量吸收能力。通过等级评价方法,确定沿薄壁方管的轴向方向设计4组诱导四角方孔可以使泡沫铝填充薄壁方管获得最佳的综合吸能特性。
The finite element model of a foam-filled thin-walled square tube for calculating its energy absorption capacity was established.The measured energy absorption performance of the tube subjected to axial load was used to verify the model.The effects of different type and number of introduced crush initiators on the axial deformation mode,the initial peak force and the energy absorption capacity of the foam-filled thin-walled square tube were studied.The results show that the introduced crush initiators can improve the energy absorption capacity,reduce the initial peak force,increase the crush force efficiency and even change the deformation mode.Moreover,by increasing the number of crush initiators along the axial direction of the square tube,these advantages can be further enhansed.Using the grade evaluation method,it can be determined that by designing 4 sets of four-corner-holes along the axial direction,the foam-aluminum-filled thin-walled square tube attains the best comprehensive energy absorption characters.
作者
李志超
上官文斌
Subhash Rakheja
刘杰
谭孟
AHMED Waizuddin
LI Zhichao;SHANGGUAN Wenbin;Subhash Rakheja;LIU Jie;TAN Meng;AHMED Waizuddin(School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,China;School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2020年第6期167-175,共9页
Journal of Vibration and Shock
基金
国家自然科学基金(51475171)。
