Influence of hole eccentricity on failure progression in a double shear bolted joint (DSBJ)

Experimental results on the influence of bolt hole to edge eccentricity for Double Shear Bolted Joints (DSBJ) used to attach fiber reinforced composite laminates are presented. Four different eccentricities of DSBJs were examined and microCT imaging conducted at different stages of the loading history are presented. The macroscopic load-hole elongation results along with the microCT images exhibit a distinct progression of failure which dictate not only the bearing load but also the ultimate load of the joint. The experimental procedure, microCT images and failure progression mechanisms are reported in this paper. The results can serve to develop a mechanism based model of DSBJ failure progression.