Hybrid Composites: Models and Tests for Environmental Aging

Abstract

A comprehensive analytical approach to evaluate the mechanical response of seawater aged hybrid composites is presented. The methodology accounts for the effects of multiple fiber reinforcement, matrix non-linearity and progressive damage to assess the stressstrain response and ultimate failure loads. The computational results compare well to data from tensile and bending tests of flat coupons and burst pressure tests of filament wound tubes.

A review on design, manufacture and mechanics of composite risers

“…Ochoa and Ross (Ochoa and Ross, 1998) and Grant and Bradley (Grant and Bradley, 1995) examined the degradation of glass-epoxy and graphite-epoxy composite tubes due to different seawater levels and obtained a good correlation between the analysis and experimental data for flexural response of the composite tubes. Rodriguez and Ochoa reported a four-point bending test comparison between carbon-fiber and glass-fiber epoxy tubes.…”

Comparative Study of Vortex-Induced Vibration of FRP Composite Risers with Large Length to Diameter Ratio Under Different Environmental Situations

“…Venkatesan et al [6] found that none of the long-term properties of carbon fiber reinforced polymer (CFRP) composites experienced any significant variations after exposure to pure water and seawater at different temperatures. On the other hand, many researchers [3,4,8,9] found that the long-term tensile strength of a CFRP reduced to about 80-95% of its short-term values. For thermoplastic composite carbon/polyether ether ketone (PEEK), the transverse strength decreased obviously in boiling water [10] and therefore, the maximum service temperature of thermoplastic FRP composites has to be well below the glass transition temperatures of their polymer matrices.…”