JMMCE  Vol.11 No.3 , March 2012
Interlaminar Fracture Toughness and Low-Velocity Impact Resistance of Woven Glass Epoxy Composite Laminates of EP3 Grade
ABSTRACT
This work presents the delamination resistance of woven glass fibre reinforced polymers (GFRP) and its influence on GFRP’s resistance to point impact. Two different types of laminates were fabricated by hand lay-up technique; (i) woven glass fibre epoxy matrix laminates and (ii) woven glass fibre epoxy matrix laminates with 3% graphite particulate fillers. End Notch Flexure (ENF) test was adopted for the measurement of delamination resistance. The two GFRPs laminates show similar mode II delamination resistance. At impact velocities between 2.215 and 4.429 m/sec, the GFRP developed a smaller damage size than the graphite-based GFRP laminates, indicating higher impact toughness. Difference of the impact resistance between the two GFRPs is mainly on the impact damage size developed. The total energy absorbed during the impact remains the same, which is independent of mode II delamination resistance of the GFRP. The history of relevant dynamic and energetic quantities, both to synthesize the dependency of the energy parameters and force threshold values on the impact velocity are discussed.

Cite this paper
N. Mathivanan and J. Jerald, "Interlaminar Fracture Toughness and Low-Velocity Impact Resistance of Woven Glass Epoxy Composite Laminates of EP3 Grade," Journal of Minerals and Materials Characterization and Engineering, Vol. 11 No. 3, 2012, pp. 321-333. doi: 10.4236/jmmce.2012.113024.
References
[1]   Abrate S. Impact on laminated composite materials. Appl Mech Rev 1991;44(4):155–89.

[2]   Cantwell WJ, Morton J. Impact resistance of composite materials – a review. Composites Part A 1991;22:347–62.

[3]   Richardson MOW, Wisheart MJ. Review of low-velocity impact properties of composite materials. Composites Part A 1996;27:1123–31.

[4]   Laksimi A, Benzeggah ML, Jing G, Hecini M, Roelandt JM. Mode I Interlaminar fracture of symmetrical cross-ply composites. Compos Sci Technol 1991;41:147–64.

[5]   Naik NK et al. Damage in woven–fabric composites subjected to low-velocity impact. Compos Sci Technol 2000;60:731–44.

[6]   Rajesh Mathivanan N, Jerald J. Experimental investigation of low-velocity impact characteristics of woven glass fibre epoxy matrix composite laminates of EP3 grade. Mater Design 2010;31(9):4553-60.

[7]   Zhang ZY, Richardson MOW. Low velocity impact induced damage evaluation and its effect on the residual flexural properties of pultruded GRP composites. Compos Struct 2007;81:195–201.

[8]   Choi HY, Chang F-K. A model for predicting damage in graphite/epoxy laminated composites resulting from low velocity point impact. J Compos Mater 1992;26:2134–69.

[9]   Razi H, Kobayashi AS. Delamination in cross-ply laminated composite subjected to low-velocity impact. AIAA Journal 1993;31(8):1498–502.

[10]   Sun CT, Manoharan MG. Growth of delamination cracks due to bending in a [905/05/905] laminate. Compos Sci Technol 1989;34:365–77.

[11]   Compston P, Jar P-YB, Burchill PJ, Takahashi K. The effect of matrix toughness and loading rate on the mode II interlaminar fracture toughness of glass-fibre/vinyl-ester composites. Compos Sci Technol 2001;61:321–33.

[12]   Jar P-YB, Gros XE, Takahashi K, Kawabata K, Murai J, Shinagawa Y. Evaluation of delamination resistance of glass fibre reinforced polymers under impact loading. J Adv Mater 2000;32(3):35–45

[13]   Kuboki T, Jar P-YB, Forest TW. Influence of interlaminar fracture toughness on impact resistance of glass fibre reinforced polymers. Compos Sci Technol 2003;63:943–53.

[14]   Davies P, Sims GD, Blackman BRK, Brunner AJ, Kageyama K, Hojo M, et al. Comparison of test configuration for determination of mode II interlaminar fracture toughness results from international collaborative test programme. Plast Rub Compos 1999;28(9):432–7.

[15]   Protocols for interlaminar fracture testing of composites. Delft (The Netherlands): European Structural Integrity Society (ESIS); 1993

[16]   Carlsson LA, Gillespie JW. Mode II interlaminar fracture of composites. In: Friedrich K, editor. Application of fracture mechanics to composite materials. Amsterdam: Elsevier; 1989;113–57.

[17]   Hirai Y, Hamada H, Kim J-K. Impact response of woven glass fabric composites—I. Effect of fibre surface treatment. Compos Sci Technol 1998;58:91–104.

[18]   Davallo M, Clemens ML, Taylor H, Wilkinson AN. Low energy impact behaviour of polyester-glass composites formed by resin transfer moulding. Plast Rub Compos Proc Appl 1998;27(8):384–91.

 
 
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