This paper presents an investigation into the effect of reinforcing a Plexiglas tube with fiberglass/epoxy threads wound at different angles. This paper shows an experimental analysis approach to find the ultimate failure pressure of these vessels. The properties of the Plexiglas, fiberglass, orientation (wind) angle and the matrix were taken into account to determine their effects on the ultimate failure pressure of the vessels. Mandrels were wound at +/- 75, +/- 65, and +/- 55 deg, and specimen were cut out from each to 19.05 cm long, 7.62 cm inner diameter and outer diameters dependent of the wind angle. The composite material used is an E-type Fiberglass and Epoxy Laminating Systems EZ-10 epoxy with EZ-83 hardener. The Dura-Wound Inc. Cobra Filament Winding Machine was used to wind the specimens. The specimens were tested with a hydrostatic test-rig to analyze the ultimate failure pressure and failure modes. An INSTRON machine was used to test the specimens under compression to determine the Young's modulus and Poisson's ratio. The experimental results indicate that the wind angle affects the mechanical properties and has strong effects on the failure modes of the reinforced vessels. The failure mode however does not differ by varying the wind angle.


Aerospace Engineering



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