摘要
采用仿真与试验结合的方法,探讨缠绕方式为[±45°/90°]碳纤维增强复合材料(CFRP)/铝混合薄壁圆管在准静态轴向压缩载荷下的压溃失效形式与吸能特性。通过准静态轴向压缩试验得到混合圆管的压溃变形历程、压溃模式以及初始压溃载荷、平均压溃载荷等吸能特性参数。依据试验样件建立混合管有限元模型,利用Abaqus/Explicit获得了与试验吻合度较好的模拟结果,重现了混合管在准静态载荷下的压溃失效行为。基于仿真结果发现与铝管相比,混合管的初始压溃载荷、平均压溃载荷、比吸能及载荷效率分别提升了97.6%、93.3%、57.8%和5.9%。并选取压溃载荷阶段性峰、谷点对混合管形态及各层纤维损伤失效形式进行了分析。结果表明:在混合管结构完整时,轴向载荷主要由纤维承载,在压溃破坏阶段,纤维损伤失效模式随纤维缠绕角度、铝管压溃形态以及CFRP/Al粘接界面状态等产生变化。随后对比了三种不同结构形式CFRP/Al混合圆管的吸能特性,发现外层缠绕[90°/±45°]CFRP/Al混合圆管吸能性最好。
Combined simulation and test to investigate the collapse failure mode and energy absorption characteristics of wingding carbon fiber reinforced composite(CFRP[±45°/90°])/Al hybrid thin-walled circular tube under quasi-static axial compression load.Failure mode,Load-displacement curves and energy absorption characteristics were obtained under quasi-static axial crushing tests.A finite element model of hybrid tube was established according to samples.The simulation results with good agreement with the test were obtained by ABAQUS/Explicit,and the crushing failure behavior of the hybrid tube under quasistatic load was reproduced.Based on the simulation results,it was found that the initial crushing load,average crushing load,specific energy absorption and load efficiency of the mixing tube were increased by 97.6%,93.3%,57.8%and 5.9%,respectively.compared with the aluminum tube.The staged peaks and valleys of the crushing load were selected to analyze the shape of hybrid tube and the failure state of the fiber damage.The results show that when the hybrid tube is complete the fiber plays the main bearing role.In the crushing failure stage,the fiber damage failure mode changes with fiber winding angle,the crushing morphology of aluminum tube and the bonding interface state of CFRP/Al.Subsequently,the energy absorption characteristics of CFRP/Al hybrid circular tubes with three different structure forms were compared.It was found that hybrid circular tube with CFRP[90°/±45°]wrapped the outside of the aluminum has the best energy absorption.
作者
董柏岩
马其华
姚远
胡沛源
孙泽玉
DONG BoYan;MA QiHua;YAO Yuan;HU PeiYuan;SUN ZeYu(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;State Key Laboratory for Modification of Chemical Fibers and Polymer,Donghua University,Shanghai 201620,China;Huayu Automotive Body Components Technology(Shanghai)Co.,Ltd.,Shanghai 200433,China)
出处
《机械强度》
CAS
CSCD
北大核心
2020年第4期817-825,共9页
Journal of Mechanical Strength
基金
纤维材料改性国家重点实验室开放课题(KF1826)
中央高校基本科研业务费专项资金学科交叉重点计划项目(18D110320)
中央高校基本科研业务费专项资金(2232018A3-02)资助。
关键词
CFRP/Al
混合薄壁圆管
数值模拟
损伤失效
吸能特性
结构形式
CFRP/Al
Hybrid thin-walled circular tube
Numerical simulation
Damage failure
Energy absorption characteristic
Structure form
