Effect of Liquid Shim on the Stiffness and Strength of the Composite-composite Single Lap Joint

Abstract

The problem of assembly gap is gradually exposed due to the low assembly precision of the composite component. This paper takes the composite-composite single lap joint with Hi-lock bolt as the research object, the influence of the liquid shim on the mechanical properties of the composite joints was studied. The stiffness and the maximum load of the composite joints decreased with the increase in the thickness of the liquid shim layer. The introduction of the liquid shim layer enlarges the geometric eccentricity of the load path and makes the problem of the uneven contact between the bolt and the inner surface of hole more serious. The radial stress of the compression zone between the hole and bolt increases significantly with the increase in the thickness of the liquid shim layer.