Effect of Panel Curvature and Thickness on Outer Panel Sink Mark by Mastic Adhesive.

Abstract

When the mastic hardens and shrinks during the painting process, sink mark caused by the retraction of the outer panel becomes an issue. Panel thickness is known to be a factor that affects sink mark, but the influence of design curvature has not been clarified. The influence of design curvature on sink mark was investigated by experiments using a laboratory model and CAE. It became clear that the effect of design curvature on distortion was greater than that of panel thickness.