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以Zn-22Al(ZA22)基泡沫材料为芯材,LY12铝板为面板制备了泡沫夹芯复合板。研究了泡沫夹芯复合板的三点弯曲行为,观察了复合板的破坏模式,分析了复合板弯曲性能的影响因素,运用层合梁刚度优化理论探讨了其机理。研究结果表明,ZA22泡沫夹芯复合板的三点弯曲载荷-位移曲线可按线性段、非线性段和失稳段表示其特征;其弯曲极限载荷随孔隙率的增大而减小,并且泡沫夹芯复合板表现出明显的层合效果。三点弯曲载荷作用下,泡沫夹芯复合板的主要失效模式为芯材的剪切破坏。
Using Zn-22Al (ZA22) -based foams as core material and LY12 aluminum as the face plate, a foam sandwich composite plate was prepared. The three-point bending behavior of the foam sandwich panel was studied. The failure modes of the composite panel were observed. The influencing factors on the bending performance of the composite panel were analyzed. The mechanism of the sandwich panel stiffness was discussed. The results show that the three-point bending load-displacement curve of ZA22 foam sandwich composite panel can be characterized by linear section, nonlinear section and unstable section. The bending ultimate load decreases with the increase of porosity, and the foam Sandwich composite panels showed significant laminating effect. Under the action of three-point bending load, the main failure mode of the foam sandwich panel is the shear failure of the core material.