摘要
通过三点弯曲冲击试验测试了泡沫铝-环氧树脂复合夹芯梁的动态力学性能,研究了这种复合夹芯梁的破坏形态、荷载-时间曲线和能量-时间曲线。分析了不同冲击速度和芯层厚度对冲击荷载和吸能量的影响,与传统蒙皮夹芯梁和纯泡沫铝梁进行了比较。结果表明,在试验设定的参数范围内,这种复合夹芯梁表现了较好的整体性。冲击速度和芯层厚度对其动态力学性能有明显的影响,随着冲击速度的增加,夹芯梁的冲击承载力逐渐增加,但冲击速度较大时复合夹芯梁会表现出一定脆性破坏,导致吸能能力降低。随着夹芯梁芯层厚度的增加,冲击承载力与吸能能力逐渐增加。与传统夹芯板和纯泡沫铝梁相比,其冲击承载力和吸能能力明显提高,说明这种泡沫铝-环氧树脂复合夹芯梁具有良好的动态力学性能。
The dynamic mechanical property of composite sandwich beam of aluminum foam and epoxy and resin is carried out by three-point impact experiment.The failure mode,load-time curve,and energy-time curve of this kind composite sandwich beam are studied.The effect of impact velocity and foam core thickness on dynamic force and energy absorption is analyzed respectively.Meanwhile,the comparison with traditional sandwich beam and pure aluminum foam beam it carries out.The results indicate that this kind composite sandwich beam shows better integrity in experiment parameter range.The impact velocity and the foam core thickness have effects on the dynamic mechanical property.With impact velocity increasing,the impact bearing capability of composite sandwich beam increases gradually.However,it shows brittle failure when impact speed is relative large and leads to the reduction of energy absorption capability.With aluminum foam core thickness increasing,the impact bearing capability and energy absorption capability increases gradually.Compared with traditional sandwich beam and pure aluminum foam beam,its impact bearing capability and energy absorption capability have been improved,indicating that this kind of composite sandwich beam has better dynamic mechanical properties.
作者
辛亚军
闫慧明
程树良
肖博
余为
李慧剑
XIN Yajun;YAN Huiming;CHENG Shuliang;XIAO Bo;YU Wei;LI Huijian(Key Laboratory of Green Construction and Intelligent Maintenance for Civil Engineering of Hebei Province,Yanshan University,Qinhuangdao,Hebei 066004,China;Key Laboratory of Mechanical Reliability for Heavy Equipments and Large Structures of Hebei Province,Yanshan University,Qinhuangdao,Hebei 066004,China)
出处
《燕山大学学报》
CAS
北大核心
2020年第1期87-94,共8页
Journal of Yanshan University
基金
河北省自然科学基金青年基金资助项目(A2014203051)
河北省自然科学基金资助项目(E2013203183)
河北省高等学校科学技术研究项目(Z2015089)
燕山大学博士基金项目(BL17027)
关键词
泡沫铝
环氧树脂
夹芯梁
冲击
三点弯曲
aluminum foam
epoxy resin
sandwich beam
impact
three-point bending
