Numerical and experimental evaluation of the formation of leakage paths through CFRP cross-ply laminates with leak barrier layers

Hamori, Hitoshi; Kumazawa, Hisashi; Higuchi, Ryo; Yokozeki, Tomohiro

doi:10.1016/j.compstruct.2019.111530

Cited by 16 publications

(2 citation statements)

References 24 publications

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“…Several studies have used thin plies in PMCs undergoing thermal fatigue. 3,36,38,54,58,67 Results indicate that thin plies successfully limit crack propagation and overall ply-by-ply damage and reduce the proliferation of cracks beyond layers of the composite that were particularly susceptible to crack formation. The available energy is lower than what is required to propagate a transverse crack through the small ply thickness of a thin ply.…”

Section: Methods To Reduce Permeabilitymentioning

confidence: 99%

“…The studies can also be categorized in terms of measuring permeability in unstitched 18,22,24,41,[48][49][50][54][55][56][57][58]60,62 (preimpregnated and resin infused composites) and stitched 36,63 composites (resin infused composites with throughthickness interlaminar reinforcements), investigating transverse microcracking, 25,26,28,30,37,38,42,49,54,55,62,64 and predicting gas flow through composites. 27,54,[65][66][67] The following section covers some of the critical factors that affect the microcrack density and, therefore, permeability in composites; these include layup, thickness of the laminate, and the load case to which they are subjected.…”

Section: Permeability and Transverse Microcrackingmentioning

confidence: 99%

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A review on gas permeability of polymer matrix composites for cryogenic applications

Saha,

Sullivan

2024

Journal of Composite Materials

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Fiber-reinforced polymer matrix composites are increasingly considered for lightweight cryogenic pressure vessels due to their excellent combination of tailorability, specific mechanical properties, and relatively low coefficients of thermal expansion. However, significant challenges must be overcome to fully utilize PMCs for cryogenic fuel tanks in terms of transverse microcracking and subsequent permeation of cryogenic fuel. Gas permeation and microcrack densities of cryogenically cycled composites are highly influenced by their layup, ply thickness, load case, and manufacturing defects like voids and resin rich zones. There has been a significant amount of research on measuring gas permeation of composites fatigued under pure thermal or uniaxial thermo-mechanical stresses. However, results demonstrate that the gas permeability should be measured under biaxial thermo-mechanical stresses to properly gauge the leakage characteristics of damaged composites. This paper summarizes the results from over a hundred papers on the key parameters that influence the gas permeability of composites, appropriate testing methods to cycle composites for permeability measurement, methods to limit the evolution of transverse microcracks, and materials traditionally used for the fabrication of all-composite cryogenic fuel tanks. Thin plies and nanofiller-toughening of the matrix have been shown to provide significant improvements in transverse microcrack suppression within cryogenically cycled composites.

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