Abstract:Through the tensile shear test of J-47, a typical adhesive in aerospace products, the effects of primer drying time, curing pressure, moisture absorption of the adhesive film, temperature increase rate and bag making method on the bonding strength were comparatively analysed. The results showed that the drying time of the primer with 35%-45% solid content had very little effect on the tensile shear strength of the medium-temperature cured adhesive film specimens, which could not well characterise the bonding of honeycomb sandwich structural parts with large bonding areas. With the increase of curing pressure, the tensile shear strength of the specimens showed an increase, then stability and then decrease, and reached the maximum value when the curing pressure was 0.15~0.3 MPa. The tensile shear strength of the specimen decreased with the increase of the time of moisture entering into the adhesive layer, and finally tended to a stable value, and when the water content reached 1.47%, the tensile shear strength was the lowest, which was 20.78% lower than the initial state. Higher tensile shear strength can be obtained by choosing suitable excipients and controlling the temperature increase rate in the range of 0.5~3 ℃/min.