Stress Analysis of FRP Bonded Structure and its Considerations
FRP bonded structures, which are single lap joint subjected to a uniform load and L shape joint subjected to a bending moment, are analyzed numerically by the finite element method proposed previously . The adherends of these joints are the uni-directional fiber reinforced plates. On the other hand, the adhesive is assumed as a layer transmitting only a shearing force.
From the numerical results, it is obvious that the stress distributions on the two joints change very much with the orientations of the reinforced fibers. If the orientations coincide with the longitudinal directions of plates, the maximum stresses in the adhesive layers of the two joints reach the minimum values. The stress distribution on the single lap joint can be estimated by using the isotropic joint model with only the longitudinal Young’s moduli of FRP plates. For the L shape joint, however, the stress distribution is very complicate and cannot be estimated by such model.
KeywordsFinite Element Method Stress Distribution Longitudinal Direction Fiber Orientation Adhesive Layer
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