In a companion paper, a characterization is presented of stress fields in a single-shear boltedconnection subjected to tension loading. Numerous stress contours are presented that illustrate themagnitude of the parallel-to-grain compression and shear stresses, as well as the perpendicular-to-grain tension stresses. In addition, regions of potential failure in the selected specimens are identifiedbased on a maximum stress failure criterion. The work presented in this paper represents additional efforts to identify the effect of stressinteractions on the strength of the previously mentioned connections. The Tsai-Wu criterion,quantified by its failure index, is used as the tool to identify stress interactions between theaforementioned stress components. Connection geometries similar to those discussed in thecompanion paper end distance/bolt diameter (e/d) = 4; and length of bolt in main member/boltdiameter (aspect ratio) (l/d) = 2, 5, and 7 are studied. In addition, several other geometries arediscussed that illustrate the effects of changing aspect ratio and end distance. A number of significant findings are reached in this study. As is the case in the companion study,all connections with l/d = 2 have nearly uniform distributions of the Tsai-Wu failure index (FI) throughthe specimen thickness. No significant pin bending is associated with this geometry. Connections withl/d> 4 have a failure mode (interpreted from the numerical model) that includes substantial pinbending due to steel yielding, wood crushing, and localized cracking.
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