首页|芯材双向开槽工艺对PET泡沫三明治结构弯曲性能的影响

芯材双向开槽工艺对PET泡沫三明治结构弯曲性能的影响

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借助实验结合仿真分析的研究方法,深入探究了芯材表面双向开槽对PET泡沫三明治结构弯曲性能的影响,采用熵权法-优劣解距离法对16种开槽工况进行了详细分析.结果表明,在三点弯曲实验中,PET泡沫芯材的压缩应变主要集中在中间压头附近,永久塑性变形出现在铝合金面板和胶层处,未在各组分材料中发现明显的失效行为.随着芯材开槽体积的增大,结构的刚度、峰值载荷和总能量吸收均增大,结构的比吸能减小;开槽深度、宽度、间距会对这些性能指标产生显著影响;胶粘剂在连接芯材和面板的同时,增强了结构的抗弯曲性能.最后,基于熵权法-优劣解距离法,确定了芯材表面最优的开槽方案.
Influence of two-way grooving process of core material on bending performance of PET foam sandwich structure
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.

PET foam sandwich structuresurface treatment of core materialbending performancehigh-precision modelanalysis of variance

王锴、余磊、金希红、张豪、姚如洋

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重载快捷大功率电力机车全国重点实验室,湖南株洲 412001

湖南大学整车先进设计制造技术全国重点实验室,湖南长沙 410082

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

湖南省自然科学基金资助项目长沙市自然科学基金资助项目中车株洲电力机车有限公司科技研发项目博士后面上资助项目

2022JJ40083kq22021572020KJ122022M721090

2024

10.3969/j.issn.1007-2012.2024.07.018

塑性工程学报
中国机械工程学会

塑性工程学报

CSTPCD北大核心
影响因子：0.46
ISSN：1007-2012
年,卷(期)：2024.31(7)