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泡沫铝夹心板静态三点弯曲变形行为及力学性能
引用本文:杨福俊,王辉,杜晓磊,何小元.泡沫铝夹心板静态三点弯曲变形行为及力学性能[J].东南大学学报(自然科学版),2012,42(1):120-124.
作者姓名:杨福俊  王辉  杜晓磊  何小元
作者单位:1. 东南大学江苏省工程力学分析重点实验室,南京,210096
2. 东南大学材料科学与工程学院,南京211189;北京科技大学新金属材料国家重点实验室,北京100083
基金项目:国家自然科学基金资助项目,东南大学自然科学预研基金资助项目
摘    要:采用焊接方法制备了泡沫铝夹心板,通过对制备出的泡沫铝夹心板进行三点弯曲实验,测量其整体的抗弯特性.应用数字图像相关方法计算了弯曲过程中试样表面的全场变形响应,结合对载荷-位移曲线的分析,讨论了2种不同孔结构夹心板的变形行为.结果表明:由于夹心材料结构上的不同,导致其破坏方式的不同;以闭孔泡沫铝为夹心的夹心板弯曲吸能比夹心为开孔泡沫铝的多,而开孔泡沫铝夹心板的弯曲刚度则更高些,这对泡沫铝夹心板的设计及工程应用具有实际指导意义.

关 键 词:泡沫铝夹心  开孔与闭孔泡沫铝  三点弯曲  表面变形行为  能量吸能

Deformation behavior and mechanical properties of aluminium foam sandwiches under static three-point bending
Yang Fujun , Wang Hui , Du Xiaolei , He Xiaoyuan.Deformation behavior and mechanical properties of aluminium foam sandwiches under static three-point bending[J].Journal of Southeast University(Natural Science Edition),2012,42(1):120-124.
Authors:Yang Fujun  Wang Hui  Du Xiaolei  He Xiaoyuan
Institution:1 (1Jiangsu Key Laboratory of Engineering Mechanics,Southeast University,Nanjing 210096,China)(2School of Materials Science and Engineering,Southeast University,Nanjing 211189,China)(3State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China)
Abstract:Static three-point bending tests were carried out in order to investigate the structural response of two different typologies of aluminium foam sandwich(AFS) panels prepared by open-and closed-cell aluminium foam core with fluxless soldered interfaces.Digital image correlation method was employed to evaluate the whole field deformation behavior of AFS side-surface.Based on image analysis and load-displacement curves,it was found that different collapse modes for samples with almost identical nominal dimensions,which depends on the own core cell structure of AFS panels.The experimental results show that open-cell AFS panels have higher bending strength than closed-cell AFS panels,and the later have higher capacity of energy absorption than the former ones.The research work provides a technological guidance to the practical design and application of the foam aluminum sandwich in the industry.
Keywords:aluminium foam sandwich  open and closed-cell aluminium foams  three-point bending  surface deformation behavior  energy absorption
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