| An analysis was performed to evaluate the stress distribution in composite pin loaded joints. In this analysis involving a push fit pin, the pin was modeled as rigid and the plate as an infinite orthotropic plate. The analysis involves first the specification of displacement expressions in form of a trigonometric series that satisfy the boundary conditions for the contact region in terms of a set of undetermined coefficients. Based on this assumed distribution, the Lekhnitskii complex variable approach is used to obtain the stress functions needed to evaluate the contact stress within the joint. Unknown coefficients in the displacement expression were obtained by assuming coulomb friction within the contact region and then evaluating the displacement at discrete points within this region. Material properties of carbon fiber reinforced plastic laminates and a graphite-epoxy laminate was used for the study and the stress distribution for various values of coefficient of friction analyzed and the results compared with the previous investigations. This analysis reveals that friction has a pronounced effect on stress distribution around the hole boundary. |
