| Citation: | SUN Chao, QI Wenkai, WEI Linzhang. Design method of tenon joint structure of resin matrix braided composite[J]. Journal of Aerospace Power, 2025, 40（4）：20230555 doi: 10.13224/j.cnki.jasp.20230555
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The research on the design method of tenon joint structure of resin matrix braided composites was carried out. Taking the nominal allowable stress as the design basis, combined with the coating contact stress, the parameters of dovetail joint were extracted and modeled, and the design process and design criteria of dovetail joint were given. The detailed calculation method of structural parameters was obtained. Combined with the dovetail tenon geometric size and yarn density, the weaving parameters of the tenon part and the yarn increase and decrease process were determined according to the thickness, and the standard finite element meso model of resin matrix braided composites with variable thickness was established. The scale separation hypothesis was proposed to analyze the stress of the tenon joint structure by combining the equal thickness and variable thickness stiffness prediction methods. The results showed that the stress distribution of dovetail tenon joint structure did not have serious stress concentration due to geometry, and the contact stress and equivalent stress fell within the range of material strength.
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