环氧树脂/泡沫铝一体型复合夹层板压缩及弯曲试验研究

提出了一种环氧树脂/泡沫铝一体型复合夹层板,通过准静态试验以及与纯泡沫铝、传统蒙皮夹层板的对比研究了其破坏过程、破坏形貌、破坏机理及压缩和弯曲力学性能。分别通过压缩应力-应变曲线和弯曲荷载-挠度曲线分析了复合层厚度对压缩及弯曲力学性能的影响,并与传统夹层板的力学性能进行了比较。结果表明,随着夹层板中环氧树脂/泡沫铝复合层厚度增加,其压缩弹性模量和抗压强度增加,弯曲承载力提高。相比传统蒙皮夹层板,由于表层和芯层之间没有明显界面,大大提高了夹芯板的整体性,在受力过程中不会出现表层剥离等现象。

Compression and Bending Experimental Study of Integrated Composite Sandwich Panel Made of Epoxy Resin/Aluminum Foam

Compression and bending properties of integrated composite sandwich panel made of epoxy resin/aluminum foam were experimentally studied. Through quasi-static experiment and comparison between pure aluminum foam and sandwich plate with traditional skin, its compression and bending mechanical properties were investigated; the failure process and damage morphology were observed, and its failure mechanism was also analyzed. The influence of epoxy composite layer on compression properties was analyzed through compression stress-strain curve. The influence of composite layer's thickness on its bending properties was analyzed based on load-deflection curve, and results of which were compared with traditional sandwich panel. Results show that both modulus of elasticity in comperssion and compressive strength increase and bearing capacity of bending is improved along with the increase of epoxy resin/aluminum foam thickness in sandwich panel. Comparing with sandwich plate with traditional skin, the integrity of this sandwich panel is greatly improved due to there is no clear interface between the surface layer and the core layer. So, surface layer peeling does not appear in force action process.