Authors
Abstract
In this paper the effect of using FRP bonded pad to reinforce damaged pipes subjected to internal pressure is investigated. Outer Longitudinal edge crack was simulated by using standard finite element method as a powerful tool for the numerical solution of a wide range of engineering problems. Cracks in the present study are investigated by using linear elastic fracture mechanics in order to calculate the stress intensity factor SIF. Mode I SIF was calculated by means of using standard FE program ANSYS5.4 and the element used was 8-node quadrilateral isoparametric element .A parametric study was done to investigate the effect of the pad width W, thickness H and the volume fraction Vf of the composite pad on the SIF of the cracked pipe .It was found that by using FRP pad to reinforce the cracked pipes , the SIF reduces in the vicinity of the crack tip, and the fiber volume fraction of the pad has a great influence on the SIF.
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