开孔泡沫铝-环氧树脂复合夹芯板局压性能试验研究*

doi:10.11901/1005.3093.2016.178

材料研究学报

2016, Vol. 30

Issue (9): 703-710 DOI: 10.11901/1005.3093.2016.178

研究论文

本期目录 | 过刊浏览

开孔泡沫铝-环氧树脂复合夹芯板局压性能试验研究*

辛亚军,肖博,程树良,李慧剑

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

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

Yajun XIN,Bo XIAO,Shuliang CHENG,Huijian LI

Key Laboratory of Mechanical Reliability for Heavy Equipments and Large Structures of Hebei Provice, Yanshan University, Qinhuangdao 066004, China

引用本文:

辛亚军,肖博,程树良,李慧剑. 开孔泡沫铝-环氧树脂复合夹芯板局压性能试验研究*[J]. 材料研究学报, 2016, 30(9): 703-710.
Yajun XIN, Bo XIAO, Shuliang CHENG, Huijian LI. Performance by Localized Indentation Test of Composite Sandwich of Open-cell Aluminum Foam and Epoxy Resin[J]. Chinese Journal of Materials Research, 2016, 30(9): 703-710.

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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。

关键词 ：复合材料, 夹芯板, 泡沫铝-环氧树脂, 复合夹芯板, 局压

Abstract：

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.

Key words： composite sandwich panel aluminum foam and epoxy resin composite sandwich panel indentation

收稿日期: 2016-04-05

基金资助:* 河北省自然科学基金E2013203183和住建部科科技计划2013-K2-2资助项目

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https://www.cjmr.org/CN/10.11901/1005.3093.2016.178 或 https://www.cjmr.org/CN/Y2016/V30/I9/703

图1 试件结构示意图

图2 试件样本

表1 试件的编号和参数

图3 试件破坏过程和破坏形态

图4 荷载-位移曲线

图5 局压各阶段试件横截面图

图6 不同复合层厚度破坏形态对比图

图7 第1/2/3组荷载-位移曲线比较

图8 第1/2/3组局压刚度、极限承载力和吸能量比较

图9 第2/4/5组荷载-位移曲线比较

图10 第2/4/5组局压刚度、极限承载力和吸能量比较

图11 第2/6组荷载-位移曲线比较

图12 第2/6组局压刚度、极限承载力和吸能量比较

图13 传统夹芯板局压破坏过程和破坏形态

图14 第2/7组荷载-位移曲线比较

图15 第2/7组局压刚度、极限承载力和吸能量比较

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