等腰梯形蜂窝芯玻璃钢夹芯板的面外压缩性能EI北大核心CSCD

利用材料试验机对玻璃钢(FRP)夹芯板面外压缩性能进行实验测试与模拟研究。结果表明:夹芯板面外压缩变形可分为弹性变形与断裂两个阶段。蜂窝芯中part 2胞壁厚度t1与part 2高度h比值t1/h较大时,夹芯板以屈服方式变形;t1/h较小时,夹芯板以屈曲方式变形。蜂窝芯中part 2为夹芯板主要承载构件,蜂窝芯中part 1与part 3对part 2起到固支作用,面板对蜂窝芯起到固支作用。蜂窝芯中part 2胞壁厚度为夹芯板面外压缩抗压强度影响的主要因素,蜂窝芯胞壁边长影响次之,而蜂窝芯中part 1,part 3与面板厚度的影响较小。夹芯板总高度一定时,随着蜂窝芯层数增加,夹芯板抗压强度逐渐增大。

Out-plane Compressive Properties for Isosceles Trapezoid Honeycomb Core of FRP Sandwich Panel

The experiment and simulation investigations on out-plane compressive characteristics of FRP sandwich panel were conducted . The results show that two deformation stages are elastic deformation and fracture stages in out-plane compressive deformation .The yielding mode deformation as t1/h which is very big ,while the buckling mode deformation as t1/h which is very small .The part 2 in the honeycomb core is main bearing part for sandwich panel ,and the part 2 is supported by the part 1 and part 3 in the honeycomb core ,while the honeycomb core is supported by the panel .So ,the cell wall thickness of part 2 has the most significant influence on the compressive strength ,and the in-fluence by the cell wall side length of honeycomb core is the secondary ,while the influence by the cell wall thickness of part 1 and part 3 in honeycomb core and the thickness of panel is the weakest .When the honeycomb core height is fixed ,the compressive strength of FRP sandwich panel gradually increa-ses along with honeycomb core layers increase .