A model capable of predicting bolted joint failure in generally orthotropic laminated composite plates which fail in the tension mode under bearing loading conditions has been developed. Ply-by-ply laminated analysis is not required. To facilitate practical application of the model, the plate is analyzed as a bulk orthotropic plate whose material properties are determined through the application of classical lamination theory. The analysis is based on fracture mechanics concepts applied to a pseudo-flaw which is related to the physical cracking of the laminate at the joint. The maximum circumferential stress concept is extended to orthotropic materials where both the fracture toughness and stress intensity vary with orientation. Experimental tests were conducted on single-bolt joints for two laminate layups; excellent correlation between experimental data and analytical prediction was found.
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