Volume 26, Issue 5 (September 1998)
Qualitative Assessment of Failure in Bolted Connections: Maximum Stress Criterion
This paper presents information regarding the distribution of critical stresses and regions where failure is likely to initiate in single bolt wood connections loaded in tension. Predicted stresses are the results of a three-dimensional numerical analysis of a connection consisting of a single steel pin and a wood member with a hole. Stresses of particular interest are: parallel-to-grain compression and shear and perpendicular-to-grain tension. Failure location is determined by considering the regions of the member where the material capacity is exceeded in at least one of the three aforementioned stresses. No stress interaction is assumed in this analysis.
A recently developed and verified three-dimensional (3-D) finite element model was used in this study. Important features of this model include a trilinear constitutive model of the nonlinear behavior of wood and a mechanism to describe the contact between the pin and the hole with changing connection load. The connection geometries studied included a single ratio of end distance to pin diameter
Stress contours are illustrated on the 3-D wood member surface, on the contact surface, and on planes of symmetry. Pin and wood deformations are also illustrated.
The results show that for connections with an