By means of experiments and simulation analysis,the influence of two-way grooving on the surface of core material on the bending performance of PET foam sandwich structure was deeply investigated.Sixteen kinds of grooving conditions were analyzed in detail by entropy weight method-technique for order preference by similarity to an ideal solution.The results show that the compressive strain of PET foam core material is mainly concentrated near the middle indenter in the three-point bending experiment,and the permanent plastic deformation occurs in the aluminum alloy panel and adhesive layer,and there is no obvious failure behavior in each component material.With the increase of grooving volume of core material,the stiffness,peak load and total energy absorption of the structure increase,and the specific energy absorption of the structure decreases.These performance indicators are significantly affected by grooving depth,width and spacing between the grooves.While adhesive connects the core material and panels,it also enhances the bending resistance performance of the structure.Finally,the optimal grooving scheme of core material is determined by entropy weight method-technique for order preference by similarity to an ideal solution.
关键词
PET泡沫三明治结构/芯材表面处理/弯曲性能/高精度模型/方差分析
Key words
PET foam sandwich structure/surface treatment of core material/bending performance/high-precision model/analysis of variance
维普
万方数据