Abstract
In this research, surface modification using Nanoimprint lithography (NIL) is conducted to an adherend of the bonded joint. We developed a mold by photolithography and formed composites on the mold. Since this surface modification can be conducted within the curing time of composites, it reduces the processing cost and time, which was required for conventional surface preparation such as sand blasting or chemical etching. In this paper, experimental results of tensile test for the butt joint are reported. This paper also includes numerical analysis of the butt joint strength. We found out that pyramid-shape microstructures on the CFRP surface could improve the joint strength because peel stress was reduced by the slope of pyramid-shape microstructures.
