The effect of stress ratio on the fracture morphology of filament wound composite tubes

► The stress ratio exerts an influence on the fracture morphology. ► The transition in the fracture morphology between closed and restrained-end condition. ► Thickness and volume fraction are variables that depend on the winding angle. A comparative study was done between two typical loading conditi...

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Bibliographic Details
Published in:Materials in engineering 2013-08, Vol.49, p.471-484
Main Authors: Martins, L.A.L., Bastian, F.L., Netto, T.A.
Format: Article
Language:English
Subjects:
A. Polymer matrix composites
C. Filament winding
Failure
Filament wound construction
Fracture mechanics
Glass fiber reinforced plastics
H. Failure analysis
Hydrostatic tests
Morphology
Polyvinyl chlorides
Stress ratio
Tubes
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Summary:► The stress ratio exerts an influence on the fracture morphology. ► The transition in the fracture morphology between closed and restrained-end condition. ► Thickness and volume fraction are variables that depend on the winding angle. A comparative study was done between two typical loading conditions (closed-end and restrained-end condition) in the pipeline and piping systems manufactured by filament wound composite tubes with the objective of studying the influence of loading condition on fracture morphology. Four thin-walled E-glass fiber epoxy tubes with different wind angles were produced to perform hydrostatic tests under restrained-end condition. The results were compared with composite tubes tested under closed-end condition in previous work. Unlined tubes were first tested to obtain the leakage failure and then tubes lined with PVC were tested for burst failure pressure under restrained-end condition. The results showed that the fracture morphology of filament wound composite tubes hold a direct relationship to the stress ratio (σHoop:σAxial).
ISSN:0261-3069
DOI:10.1016/j.matdes.2013.01.026