RESEARCH ON EDGESIDE COMPRESSION PROPERTIES OF PLAIN WEAVE PANEL FOAM SANDWICH COMPOSITE MATERIAL AFTER REPAIR

doi:10.19936/j.cnki.2096-8000.20210328.008

Abstract

Abstract: In order to study the influence of different repair methods and repair parameters on the edgeside compression performance of plain woven panel foam sandwich structure, the edgeside compression test was carried out on the specimen and the repaired specimen. By comparing the test results, the effects of repair methods and repair parameters on the edgeside compression strength and edgeside compression modulus of the plain sandwich woven panel foam sandwich structure are analyzed. The specimen destruction mode is also analyzed in the article. The results show that the edgeside compression strength of single-sided panel repair is higher than that of double-sided panel repair and single-sided panel plus core repair. When single-sided panel repair, the smaller scarf repair angle of the laminate, the lower the edgeside compression strength of the specimen. The overlap width of the over-ply has a great influence on the edgeside compression strength of the specimen. After the repair, the edgeside compression modulus of the specimen is improved compared with the intact specimen. When the single-sided panel is repaired, changing the proportion of the scarf repair angle does not affect the edgeside of the specimen compression modulus, and suitable over-ply overlap width has a positive effect on the increase of the edgeside compression modulus of the specimen. Changes in repair methods and repair parameters do not affect the failure mode of the specimen, the edgeside compression of plain-weave panel foam sandwich composites mainly failed after the foam core material ruptured, and the overall structure of the panel without core material support was compressed. The failure modes of the panel are mainly the bending of the end of the panel, the bending of the middle of the panel, the wrinkling of the panel and the fiber breakage of the panel.

Key words: plain weave, composite material, repair, foam sandwich structure, edgewise compression

CLC Number:

TB332

ZHANG Tie-chun, ZHANG Shi-qiu, WANG Xuan, ZHOU Chun-ping, WANG Fu-sheng. RESEARCH ON EDGESIDE COMPRESSION PROPERTIES OF PLAIN WEAVE PANEL FOAM SANDWICH COMPOSITE MATERIAL AFTER REPAIR[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(3): 51-59.

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