The influence of stacking sequence on mode I interlaminar fracture toughness of glass fiber/epoxy composite panels

Abstract

Delamination is a typical fracture mechanism in fiber reinforced composite laminates occurs due to low interlaminar strength.Some well-known sources of delamination under different loadings are free edges, cut out, low-velocity impact and fabrication defects.These damages may considerably reduce the global stiffness
and strength and then leads to a catastrophic structure failure. In this study, the influence of stacking sequence on mode I interlaminar fracture toughness of E-glass/epoxy laminated composites is experimentally investigated. On the other hand, delamination resistance and fiber bridging are investigated. Double cantilever beam (DCB) specimens with woven roving of glass fiber of stacking sequences; [0º/90º]4s, [90º/0º]4s and [±45º]4s with an initial crack length are used. Load- displacement curve is obtained in DCB test and then interlaminar fracture toughness (GI) is estimated with R-curve. Results showed that interlaminar fracture toughness increased as the stacking sequence was changed from 0º to ±45º and ±45º to 90º and fiber bridging is more stable.
Keywords: Mode I interlaminar fracture toughness, stacking sequence, delamination, composite panels.

Keywords

Main Subjects

References

[1] William JG (1989) Fracture mechanics of anisotropic materials. Composite Material Series Application of Fracture Mechanics to Composite Materials 6: 3–38.
[2] ASTM Standard D5528-94a, Standard test method for mode I interlaminar fracture toughness of unidirectional continuous fiber reinforced polymer matrix composites. Philadelphia, PA, 1994.
[3] Standard test methods for flexural properties of unreinforced and reinforced plastics and electrical insulating materials 1. Annual Book of ASTM Standards: 1-11 (2008).
[4] Tay TE (2003) Characterization and analysis of delamination fracture in composites: An overview of developments from 1990 to 2001. Applied Mechanics Reviews 56: 1–23.
[5] Brunner AJ, Blackman BRK, Davies P (2008) Mode II initiation fracture toughness analysis for wood obtained by 3-ENF test. Engineering Fracture Mechanics 75: 2779–2794.
[6] Chai H (1984) The effect of defects in tubes: Part 1. Mode I delamination resistance. Composites 15: 277–290.
[7] Gutkin R, Laffan ML, Pinho ST, Robinson P, Curtis PT (2011) Modelling the R-curve effect and its specimen-dependence. International Journal of Solids and Structures 48: 1767–1777.
[8] Shetty MR, Vijay Kumar KR, Sudhir S, Raghu P, Madhuranath AD (2000) Effect of fiber orientation on mode i interlaminar fracture toughness of glass epoxy composites. Journal of Reinforced Plastics and Composites 19: 606–620.
[9] Miyagawa H, Sato C, Ikegami K (2009) Effect of fiber orientation on mode i fracture toughness of CFRP. Polymer 115: 2–9.
[10] Suo Z, Bao G, Fan B (1992) Limiting mechanisms of mode i interlaminar toughening of composites reinforced with aligned carbon nanotubes. Journal of Mechanics Physics Solids 40: 1–16.
[11] De Moura MFSF, Campilho RDSG, Amaro AM, Reis PNB (2010) Interlaminar and intralaminar fracture characterization of composites under mode I loading. Composite Structures 92: 144–149.
[12] Kan HP, Deo RB, Shah C, Kinslow R (1987) Resistance curve approach to predicting residual strength of composites. Air Force Office of Scientific Research 20332-6448, Report No. AFOSR-TR-87-0062.
[13] Petrescu I, Mohora C, Ispas C, (2011) Interlaminar fracture toughness behavior for CFRP unidirectional laminates using DCB test. Proceedings of the 22nd International DAAAM Symposium, Vienna, Austria, EU.
[14] Shokrieh MM, Heidari-Rarani M, Ayatollahi MA (2012) Delamination R-curve as a material property of unidirectional glass/epoxy composites. Materials and Design 34: 211–218.
[15] Nicholls DJ, Gallagher JPJ (1983) Effect of fiber orientation on mode I fracture toughness. Reinforced Plastic Composite 2(3): 168–183.
[16] Shokrieh MM, Heidari-Rarani M (2011) Effect of stacking sequence on R-curve behavior of glass/epoxy DCB laminates with 0◦//0◦ crack interface. Materials Science and Engineering A 529: 265–269.
[17] Gong XJ, Hurez A, Verchery G (2010) On the determination of delamination toughness by using multidirectional DCB specimens. Polymer Testing 29(6): 658–666.
Journal of Solid and Fluid Mechanics
Volume 4, Issue 2 - Serial Number 2
May and June 2014
Pages 183-187

Files

Share

How to cite

Statistics