バイパス力とベアリング力を同時に受けるCFRP積層板のファスナー継手の破壊挙動

抄録

The effects of bypass and bearing forces on the failure behaviors of mechanical joints of carbon fiber reinforced CFRP laminates were experimentally studied. Two types of specimens were tested: single-shear/single-fastener (SS) and single-shear/double-fastener (SD) specimens. In addition to specimens prepared according ASTM standards, narrower specimens than those designated by ASTM standards were prepared. The strengths of the resulting fastener joints were limited by the bearing strength of the fastener portion, and were comparably constant regardless of the specimen width when the width exceeded a critical value which depended on the number of fasteners. The narrow specimens, however, tended to fail in a tensile brittle manner at the side edge of the hole after the accumulation of the bearing damage. The ductility of the fastener joints was discussed from the reduced equivalent width of the plates.