开孔泡沫铝-环氧树脂复合夹芯板局压性能试验研究

发布时间：2018-07-26 10:22

【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。
[Abstract]:Quasi static local compression test was carried out on a porous aluminum / epoxy composite sandwich plate. The failure patterns and typical load-displacement curves were studied, and the thickness of different composite layers was analyzed by comparing it with the traditional skin sandwich panel. The effects of different head types and different boundary conditions on the local compression stiffness, ultimate bearing capacity and energy absorption are investigated. The results show that the open-hole aluminum / epoxy composite sandwich plate exhibits good integrity, stability and energy absorption performance under local pressure. The typical load-displacement curve has four stages: elastic stage and local damage stage. The whole damage stage and the punching failure stage. The mechanical properties of sandwich panels can be significantly improved by the composite layer of foamed aluminum and epoxy resin, and the mechanical properties and failure modes of the spherical cylindrical head are obviously different from those of the cylindrical and square compactors, and the mechanical properties of the sandwich panels tend to increase with the increase of the thickness. The mechanical properties under simply supported boundary conditions are obviously lower than those under clamping condition. Compared with the traditional sandwich panels, the stiffness, strength, energy absorption and integrity of the sandwich panels are greatly improved.
【作者单位】：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;
【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~~
【分类号】：TB333

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