开孔泡沫铝-环氧树脂复合夹芯板局压性能试验研究  

Performance by Localized Indentation Test of Composite Sandwich of Open-cell Aluminum Foam and Epoxy Resin

作　　者：辛亚军[1] 肖博[1] 程树良[1] 李慧剑[1] 

机构地区：[1]燕山大学河北省重型装备与大型结构力学可靠性重点实验室,秦皇岛066004

出　　处：《材料研究学报》2016年第9期703-710,共8页Chinese Journal of Materials Research

基　　金：河北省自然科学基金E2013203183;住建部科科技计划2013-K2-2资助项目~~

摘　　要：对一种开孔泡沫铝-环氧树脂复合夹芯板进行了准静态局部压缩试验,研究了其破坏形态和典型荷载-位移曲线,并与传统蒙皮夹芯板进行了对比,分析了不同复合层厚度、不同压头类型和不同边界条件对局压刚度、极限承载力及吸能量等主要性能参数的影响。结果表明开孔泡沫铝/环氧树脂复合夹芯板在局部压力作用下表现了较好的整体性、稳定性和吸能性能,其典型荷载-位移曲线经历四个阶段:弹性阶段、局部损伤阶段、整体损伤阶段和冲切破坏阶段。泡沫铝-环氧树脂复合层能显著提高夹芯板力学性能,且随厚度增加有增强趋势,球柱形压头作用下的破坏形态和力学性能与圆柱形压头和方形压头有明显区别,简支边界条件下力学性能比固支时明显降低。与传统夹芯板相比,这种夹芯板的刚度、强度、吸能量和整体性都有较大提高。By carrying out quasi-static localized indentation tests, failure modes and typical load-displacement curves of composite sandwich of open- cell aluminum foam and epoxy resin were studied. It was also compared with the traditional sandwich panel. The influence of composite layer thickness, indenter type and boundary condition on the localized indentation stiffness, ultimate bearing capacity and energy absorption capacity were analyzed. The results indicate that this kind of composite sandwich panel has good integrality, stability and energy absorption capacity in the condition of indentation. Load-displacement curves have gone through four phases： elastic phase, local damage phase, overall damage phase and punching failure phase. Mechanical properties of sandwich panel have been obviously improved by the over lapped layers of aluminum foam and epoxy resin. Also, there exists an increasing tendency of the mechanical property of the panel with the increase of composite layer thickness. Failure modes and mechanical properties of specimens with spherical indenter are very different from cylindrical indenter and square indenter. Mechanical properties of specimens, which were simply supported are poorer than specimens, which were fully fixed. The stiffness, strength, energy absorption capacity and integrality of composite sandwich panel are superior to those of the traditional sandwich panel.

关 键 词：复合材料 夹芯板 泡沫铝-环氧树脂 复合夹芯板 局压 

分 类 号：TG115[金属学及工艺—物理冶金]