Study on structural design and drawing performance of new partially potted inserts in honeycomb sandwich structure

doi:10.19936/j.cnki.2096-8000.20220328.031

Abstract

Abstract: The structure of traditional inserts in honeycomb sandwich panels are usually I-shaped, which requires manual injection of potting materials until the potting materials fills honeycomb core, resulting in low accuracy, low efficiency and large overall weight. In order to reduce weight and adapt to automatic assembly, a new hat-shaped partially potted insert was designed, an automatic assembly platform of inserts was built, and the process verification of automatic assembly of inserts was completed. The filling state of potting materials with different numbers of flow orifices was analyzed by industrial CT system. With the help of tensile testing machine, the tensile tests perpendicular to the panel were carried out on the new hat-shaped partially potted inserts with different numbers of flow orifices and different amounts of potting materials injection and the traditional I-shaped full potted inserts filled with 100% potting materials. The results show that the more the number of flow orifices on the side of the new hat-shaped partially potted insert, the more uniform the distribution of potting materials in the honeycomb core, and the better the tensile properties of the inserts. And the increase of the amount of potting materials injection can significantly improve the drawing capacity of the inserts, and the corresponding total mass of the structure will also improve rapidly. However, when the amount of potting materials is too large, the excess potting materials will flow to the bottom of the honeycomb core, so that the increase of drawing capacity is not obvious. Compared with the traditional I-shaped full potted inserts, the maximum drawing capacity of the new hat-shaped partially potted inserts is reduced, but the reduction is small, in which the G08-P04 is only reduced by 9.5%, while the structural weight can be reduced by 65.2%, which is more suitable for the requirements of low-load and light-weight structural plate. The work done in this paper can provide reference for weight reduction design and automatic assembly of inserts in honeycomb sandwich panels.

Key words: honeycomb sandwich panels, potting process, partially potted inserts, drawing capacity, automatic assembly, composites

CLC Number:

TB332

CUI Haonan, WEN Liwei, ZHAO Cong. Study on structural design and drawing performance of new partially potted inserts in honeycomb sandwich structure[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(1): 26-33.

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