Crushing characteristics of filament wound carbon fiber/epoxy tube under quasi-static compression condition

Abstract

We investigated the effect of structural factor and amide grafted multi-walled carbon nanotubes (MWNTs-NH₂) on crushing characteristics of filament wound CFRP tube under quasi-static compression conditon. It was found that CFRP tubes sequentially showed the brittle fracturing mode, the local buckling fracturing mode and transverse shearing fracturing mode with increasing winding angle, respectively, with the characterizations by mechanical testing, SEM and optical microscopy. Moreover, crack propagation initiated by pre-crack and subsequent failure in the tube were strongly dependent on pre-crack angle due to deflection and penetration competition of crack evolution. The simulated compression failure behavior correlated well with the experimental results, revealing that the Chang-Chang failure criterion was effective in representing the quasistatic crushing characteristics of the tube. In addtion, the MWNTs-NH₂ were sucessfully obtained by multistep functionization. The compressvie properties of the tubes were significantly improved by the addition of the MWNTs-NH₂ due to their uniform dispersion and high interfacial chemical reactivity, whereas the as-received MWNTs and other functionalized MWNTs were not as effective.

Keywords

winding angle / pre-crack angle / crushing characteristics / MWNTs

References

[1] Morozov EV. The Effect of Filament Winding Mosaic Patterns on the Strength of Thin-walled Composite Shells[J]. Compos. Struct., 2006 123-129.

[2] Rousseau J, Perreux D, Verdietre N. The Influence of Winding Patterns on the Damage Behaviour of Filament-wound Pipes[J]. Compos. Sci. Technol., 1999, 59(9): 1439-1449.

[3] Li XC, Sui G, Yang XP, et al. The Improvement of Wettability, Mechanical and Thermo-mechanical Performances of PBO Fiber/Epoxy Composites by Adding Reactive Carbon Nanotubes[J]. Polym. Polym. Compos., 2011, 19(4–5): 391-396.

[4] Chang FK, Chang KY. Post-failure Analysis of Bolted Composite Joints in Tension or Shear-out Mode Failure[J]. J. Compos. Mater., 1987, 21: 809-833.

[5] Labeas G, Belesis S, Stamatelos D. Interaction of Damage Failure and Post-buckling Behaviour of Composite Plates With Cut-outs by Progressive Damage Modeling[J]. Compos. Part B, 2008, 39: 304-315.

[6] Moon CJ, Kim IH, Choi BH, et al. Buckling of Filament-wound Composite Tubes Subjected to Hydrostatic Pressure for Underwater Vehicle Applications[J]. Compos. Struct., 2010, 92: 2241-2251.

[7] Liu HK, Liao WC, Tseng L, et al. Compression Strength of Predamaged Concrete Tubes Reinforced by Non-adhesive Filament Wound Composites[J]. Compos. Part A, 2004, 35: 281-292.

[8] Farley GL, Jones RM. Crushing Characteristics of Continuous Fiberreinforced Composite Tubes[J]. J. Compos. Mater., 1992, 26(1): 37-50.

[9] Mamalis AG, Manolakas DE. Crashworthy Behavior of Thinwalled Tubes of Fiberglass Composite Materials Subjected to Axial Loading[J]. J. Compos. Mater., 1990, 24: 72-91.