Abstract
Observation of stress distribution in an adhesive layer was carried out to mix a mecanoluminesence material. The novel material is ceramic powders which consist of SrAl_20_2:Eu and shows luminescence when loads are applied. Specimens of joints having transparent adherends of acrylic plates bonded with the adhesive including the mecanoluminesence material were prepared. Quasi static load or repeated load were applied to the specimen The luminescence of the adhesive layer were observed through the transparent adherend. Bright parts were found around the both edges of the joints. Therefore, it seems that the stress distribution along the bond line can be visualized by the method.
