Stiffness and strength of filament-wound fiber-reinforced composite pipes under internal pressure

摘要

This paper describes the results of analytical and experimental studies on the rigidity and strength of filament-wound (FW) fiber-reinforced composite pipes under internal pressure. The stiffness, deformation and strength of FW pipes wound at 30degrees, 45degrees, 55degrees and 70degrees, as well as those of a FW sandwich pipe wound at 55degrees, were investigated. The experimental strain and displacement for FW pipes wound at 45degrees and 55degrees coincided well with the theoretical ones. The experimental strain for FW sandwich pipes was more conservative than the theoretical one. Based on a maximum stress failure criterion, we present a theoretical approach to the prediction of failure strength under internal pressure. Experimental pressure at failure was compared with theoretical loads, and there was a good correlation between the theoretical and experimental results. [References: 15]