Abstract
The purpose of this study was to investigate the usefulness of dissimilar joining utilizing the property of expansion of the carbon fiber-reinforced thermo plastics (CFRTP) plate near the melting temperature of the matrix resin in the thickness direction. We developed a method to obtain joining strength by generating a force to push an Al piece from out of a groove potion by heating it provided with straight and tapered groove to an arbitrary temperature and then inserting CFRTP and expanding it. Experimental results and joining strength were evaluated. In addition, to confirm the relationship between the thermal expansion of CFRTP and the joining strength, the increase in plate thickness was examined when a CFRTP plate was sandwiched between two previously heated Al plates. Furthermore, to compare joining strength, the same test piece was adhered to the Al piece with epoxy adhesive and the joining strength was evaluated. As a result, a relationship between expansion due to the heating of CFRTP and joining strength was confirmed. Furthermore, by tapering the groove portion of the Al piece, almost the same joining strength as that when using adhesive was obtained.
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