고온, 고습에 노출된 접착제 및 접착제 조인트의 기계적 특성

Abstract

The mechanical properties of adhesively bonded joint may degrade when the joint is exposed to high temperature or high humidity environments because of the property degradation of adhesive. In this paper, the strength and modulus of the adhesives under hydrothermal environments were investigated with respect to absorbed moisture content and temperature. In addition, the strength of the adhesively bonded tubular lap joints was investigated with respect to absorbed moisture content. From the investigation, it was found that the strength of joints were decreased in accordance with the absorbed moisture content and the steel adherend exposed to humid environments for a long time rusted. Also chemical surface treatments of adherend for the improvement of strength retention of the joint under hydrothermal environments were investigated.