大曲率蜂窝夹层结构制造过程蜂窝芯变形控制技术

doi:10.19936/j.cnki.2096-8000.20221128.032

复合材料科学与工程 ›› 2023, Vol. 0 ›› Issue (8): 115-120.DOI: 10.19936/j.cnki.2096-8000.20221128.032

大曲率蜂窝夹层结构制造过程蜂窝芯变形控制技术

刘琦^1,2, 成艳娜², 徐小伟², 王小凯², 韩强儒², 赵志勇^1*

1.西北工业大学机电学院,西安 710072;
2.中航西安飞机工业集团股份有限公司,西安 710089

收稿日期:2022-05-13 出版日期:2023-08-28 发布日期:2023-10-20
通讯作者: 赵志勇(1995—),男,博士研究生,主要从事蜂窝夹层复合材料成型及其力学性能方面的研究,zy_1995@mail.nwpu.edu.cn。
作者简介:刘琦(1990—),男,硕士,工程师,主要从事复合材料成型方面的研究。

Deformation control technology for honeycomb during the manufacture of large curvature honeycomb sandwich structures

LIU Qi^1,2, CHENG Yanna², XU Xiaowei², WANG Xiaokai², HAN Qiangru², ZHAO Zhiyong^1*

1. School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China;
2. AVIC Xi’an Aircraft Industry Group Company Ltd., Xi’an 710089, China

Received:2022-05-13 Online:2023-08-28 Published:2023-10-20

摘要/Abstract

摘要： 为防止大曲率蜂窝夹层结构制造过程芯格之间由于弯曲产生严重的拉伸、挤压变形,保证蜂窝夹层结构优良的力学特性,采用开槽方法对芯格变形进行调控。在不同弯曲半径下,设计不同厚度、宽度的蜂窝芯弯曲试验,通过提取弯曲后蜂窝芯上表面芯格轮廓,提出一种蜂窝芯变形评估方法,研究弯曲半径、蜂窝芯厚度对蜂窝芯变形影响;进而建立蜂窝芯弯曲过程开槽判据准则,确定开槽参数(开槽间距、开槽角度)与弯曲半径、蜂窝芯厚度几何关系;基于提出的蜂窝芯开槽变形调控方法,以蜂窝夹层整流罩零件为例,设计零件开槽参数并对其进行实例验证。结果表明:蜂窝芯变形量随弯曲半径的增加而增加,随厚度的增加而减小;开槽间距与弯曲半径、蜂窝芯厚度可用线性拟合;对开槽后蜂窝夹层整流罩零件进行弯曲,弯曲后槽口最大间距小于1 mm,满足零件制造精度要求。

关键词: 大曲率, 蜂窝夹层结构, 弯曲变形, 变形控制, 复合材料

Abstract: To prevent severe tensile and extrusion deformation between the honeycomb cores due to bending during the manufacture of large curvature honeycomb sandwich structures and to ensure the excellent mechanical properties of honeycomb sandwich structures, the honeycomb deformation is governed by means of grooving. Bending tests were designed for honeycombs of different thicknesses and widths at different bending radii, and a method was proposed to evaluate the deformation of honeycomb cores by extracting the upper surface contours of the honeycombs after bending. The effects of bending radius and thickness on the deformation of honeycombs were investigated. Based on the proposed honeycomb grooving deformation control method, the grooving parameters of a honeycomb sandwich fairing part are designed and verified. The results show that the deformation of honeycomb increases with the increase of bending radius and decreases with the increase of thickness; the grooving spacing can be linearly fitted with the bending radius and honeycomb thickness; after the grooved honeycomb sandwich fairing part is bent, the maximum spacing of the grooves is less than 1 mm after bending, which meets the manufacturing accuracy requirements of the part.

Key words: large curvature, honeycomb sandwich structures, bending deformation, deformation control, composites

中图分类号:

TB332

刘琦, 成艳娜, 徐小伟, 王小凯, 韩强儒, 赵志勇. 大曲率蜂窝夹层结构制造过程蜂窝芯变形控制技术[J]. 复合材料科学与工程, 2023, 0(8): 115-120.

LIU Qi, CHENG Yanna, XU Xiaowei, WANG Xiaokai, HAN Qiangru, ZHAO Zhiyong. Deformation control technology for honeycomb during the manufacture of large curvature honeycomb sandwich structures[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(8): 115-120.

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大曲率蜂窝夹层结构制造过程蜂窝芯变形控制技术

Deformation control technology for honeycomb during the manufacture of large curvature honeycomb sandwich structures

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