吸波蜂窝壁板与芯层面外等效力学参数研究  

Study of equivalent mechanical parameters out-of-plane of wave-absorbing honeycomb panel and core layer

作　　者：吴佳册 胡小平[1] 纪华伟[1] WU Jiace;HU Xiaoping;JI Huawei(School of Mechanical Engineering,Hangzhou Dianzi University,Hangzhou 310018,China)

机构地区：[1]杭州电子科技大学机械工程学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2024年第3期94-102,共9页Journal of Hangzhou Dianzi University：Natural Sciences

基　　金：国家自然科学基金资助项目(51975173)。

摘　　要：获取吸波蜂窝胞元壁板的力学性能是研究其切削机理和优化切削工艺参数的重要基础。由于吸波蜂窝制备工艺特点和浸渍层的材质特性,采用传统等壁厚胞元模型得到的壁板力学参数,不能准确反映吸波蜂窝壁板的力学性能。本文提出变厚度Y型胞元模型,以力学性能等价为原则,采用能量法建立胞元壁板力学参数与吸波蜂窝等效力学参数的映射关系;通过图像处理技术确定变厚度Y型胞元的结构参数,利用变厚度Y型胞元周期阵列建立吸波蜂窝三维模型,仿真得到的蜂窝芯层面外弹性模量和面外剪切模量与实验结果对比,均不超过5%;分别对基于变厚度Y型胞元和等壁厚胞元建模的吸波蜂窝开展超声切削仿真,与实验结果对比,前者主切削力方向的误差为13.67%,后者高达47.8%。研究工作为壁板厚度分布不均匀的蜂窝复合材料力学性能研究、切削机理和加工工艺参数优化研究提供理论基础和新的研究方法。Obtaining the mechanical properties of wave-absorbing cell wall is an important basis for studying its cutting mechanism and optimizing the cutting process parameters.Due to the characteristics of the preparation process of the absorbing honeycomb and the material properties of the impregnated layer,the mechanical parameters of the panel obtained by the traditional equal wall thickness cell model cannot accurately reflect the mechanical properties of the absorbing honeycomb panel.In this paper,a Y-type cell model with variable thickness is proposed.Based on the principle of equivalent mechanical properties,the mapping relationship between the mechanical parameters of the cell wall and the equivalent mechanical parameters of the absorbing honeycomb is established by using the energy method.The structural parameters of the variable thickness Y-type cell are determined by image processing technique,and the three-dimensional model of the absorbing honeycomb is established by using the periodic array of the variable thickness Y-type cell.Simulation results of the out-of-plane elastic modulus and out-of-plane shear modulus of the honeycomb core are compared with the experimental results,which are not more than 5%.The ultrasonic cutting simulation of absorbing honeycomb based on variable thickness Y-type cell and equal wall thickness cell is carried out respectively.Compared with the experimental results,the error of the main cutting force direction of the former is 13.67%,and the latter is as high as 47.8%.The research work provides a theoretical basis and a new research method for the study of mechanical properties,cutting mechanism and optimization of processing parameters of honeycomb composites with uneven wall thickness distribution.

关 键 词：浸渍液堆积 变厚度Y型胞元 面外等效模量 切削力 切削仿真 

分 类 号：V229.7[航空宇航科学与技术—飞行器设计]