Influence of Environmental and Geometric Parameters on the Behavior of Fastener Joints in Advanced Composites

摘要

Single-and double-shear bearing strength of mechanically fastened joints in carbon fiber composite (CFC) systems have been studied and the analysis of results presented. CFC laminates made from unidirectional prepreg tapes as well as bidirectional fabric prepregs were tested in as-received condition at room temperature and under hot/wet environmental conditins after hygrothermal aging. The influence of geometric parameters like the specimen width-to-hole diameter ratio (w/d) and the specimen thickness-to-hole diameter ratio (t/d), on the bearing strength has been investigated. Bearing strength tests were performed with three different fastener bolt materials and, in all, over 300 specimens were tested.