| Citation: | XUE Xiao, SUN Yungang, XUAN Shanyong. Analysis and multi-objective optimization of the scarf bonded composite co-curing process[J]. Journal of Aerospace Power, 2024, 39（12）：20220921 doi: 10.13224/j.cnki.jasp.20220921
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Considering two materials of J-116B adhesive and ZT7H/QY9611 composite prepreg, the co-curing behavior and residual stress distribution of the scarf bonding composite structure were numerically simulated, and the results showed that the scarf bonded structure exhibited bimodal overheating behavior in the rapid curing stage, and the exothermic superposition effect led to a significantly high residual thermal stress at the patch-adhesive interface layer. At the same time, the fiber direction, scarf slope and heating rate were taken as the design variables to optimize the curing residual stress, and the results showed that increasing the scarf slope, reducing the heating rate or tending to the width direction of the fiber direction are conducive to the reduction of curing residual stress; when the fiber direction of the adhesive joint was 45°, the scarf slope was 1∶20 and the heating rate was 2 K/min, the maximum residual thermal stress of the adhesive layer was only 10.23 MPa, 76.7% lower than that before optimization.
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