Mode I delamination growth of multidirectional composite laminates under fatigue loading

Abstract

Fatigue delamination growth of multidirectional carbon/bismaleimide composites was investigated to disclose the specific role of ply orientations. Both fatigue crack growth rate and threshold values of strain energy release rate in Mode I were studied by double cantilever beam test. For specimens with rising delamination resistance effect, the fatigue crack growth rate was found to be dependent on normalized interlaminar energy, G_I/G_IC, rather than G_I. The experimental data also show that the fatigue threshold G_th is almost proportional to the corresponding G_IC, that is G_th /G_IC is constant and hardly affected by the midplane-adjacent fiber orientation. Furthermore, fractographs revealed that the rising delamination resistance is dominantly aroused by fiber bridging and intra-ply fracture.

Keywords

polymer—matrix composite multidirectional laminates fatigue delamination fracture toughness

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References

Brunner AJ , Murphy N. and Pinter G. Development of a standardized procedure for the characterization of interlaminar delamination propagation in advanced composites under fatigue mode I loading conditions. Eng Fract Mech 2009; 76(18): 2678-2689.

Davies P. , Blackman BRK and Brunner AJ Standard test methods for delamination resistance of composite materials: current status. Appl Compos Mater 1998; 5(6): 345-364.

Tay TE Characterization and analysis of delamination fracture in composites, a review of developments from 1990 to 2001. Appl Mech Rev 2003; 56(1): 1-23.

Brunner AJ , Blackman BRK and Davies P. A status report on delamination resistance testing of polymer-matrix composites . Eng Fract Mech 2008; 75(9): 2779-2794.

ISO 15024. Fibre-reinforced plastic composites - determination of mode I interlaminar fracture toughness, GIC, for unidirectionally reinforced materials. Geneva, Switzerland: International Organization for Standardization, 2001.

Hojo M. , Tanaka M. , Gustafson C. , et al. Effect of stress ratio on near-threshold propagation of delamination fatigue cracks in unidirectional CFRP. Compos Sci Technol 1987; 29(4): 273-292.

Hojo M. , Ochiai S. , Gustafson C. , et al. Effect of matrix resin on delamination fatigue crack growth in CFRP laminates. Eng Fract Mech 1994; 49(1): 35-47.

Hojo M. , Matsuda S. , Tanaka M. , et al. Mode I delamination fatigue properties of interlayer-toughened CF/epoxy laminates. Compos Sci Technol 2006 ; 66(5): 665-675.

Hojo M. , Nakashima K. , Kusaka T. , et al. Mode I fatigue delamination of Zanchor-reinforced CF/epoxy laminates . Int J Fatigue 2010; 32(1): 37-45.

10.

O’Brien K. Generic aspects of delamination in fatigue of composites. AHSJ 1987; 32: 13-18.

11.

Martin RH and Murri GB Characterization of mode I and mode II delamination growth and thresholds in graphite/PEEK composites, TM 100577. Washington DC: NASA, 1988.

12.

Asp LE , Sjogren A. and Greenhalgh ES Delamination growth and thresholds in a carbon/epoxy composite under fatigue loading. J Compos Technol Res 2001 ; 23(2): 55-68.

13.

Argülles A. , Viña J. , Canteli AF , et al. Interlaminar crack initiation and growth rate in a carbon-fibre epoxy composite under mode-I fatigue loading . Compos Sci Technol 2008 ; 68(12): 2325-2331.

14.

Shivakumar KN , Chen H. , Abali F. , et al. A total fatigue life model for mode I delaminated composite laminates. Int J Fatigue 2006; 28(1): 33-42.

15.

Choi NS , Kinloch AJ and Williams JG. Delamination fracture of multidirectional carbon-fiber/epoxy composites under mode I, mode II and mixed-mode I/II loading . J Compos Mater 1999; 33(1): 73-100.

16.

de Morais AB , de Moura MF , Marques AT , et al. Mode-I interlaminar fracture of carbon/epoxy cross-ply composites. Compos Sci Technol 2002 ; 62(5): 679-686.

17.

Pereira AB and de Morais AB Mode I interlaminar fracture of carbon/epoxy multidirectional laminates . Compos Sci Technol 2004; 64(13and14): 2261-2270.

18.

Brandt F. A new load introduction concept for improved and simplified delamination beam testing. Exp Tech 1998; 22(1): 17-20.

19.

Hashemi S. , Kinloch AJ and Williams JG Mechanics and mechanisms of delamination in a poly(ether sulphone)- fibre composite. Compos Sci Technol 1990; 37(4): 429-462.

20.

Hashemi S. , Kinloch AJ and Williams JG The effects of geometry, rate and temperature on the mode I, mode II and mixed-mode I/II interlaminar fracture of carbonfiber/poly(ether-etherketone) composites . J Compos Mater 1990; 24: 918-956.

21.

Sorensen L. , Botsis J. , Gmür T. , et al. Bridging tractions in mode I delamination: measurements and simulations. Compos Sci Technol 2008; 68(12): 2350-2358.

22.

Szekrényes A. and Uj J. Advanced beam model for fiber-bridging in unidirectional composite double-cantilever beam specimens. Eng Fract Mech 2005; 72(17): 2686-2702.

23.

Tamuzs V. , Tarasovs S. and Vilks U. Progressive delamination and fiber bridging modeling in double cantilever beam composite specimens. Eng Fract Mech 2001 ; 68(5): 513-525.

24.

Paris P. Fatigue - an interdisciplinary approach. In: Burke JI et al. (eds) Proceedings of the Tenth Sagamore Army Materials Research Conference. New York: Syracuse University Press, 1964, pp.107-127.

25.

Wilkins DJ , Eisenmann JR , Camin RA , et al. Characterizing delamination growth in graphite-epoxy. In: Reifsnider KL (ed.) Damage in Composite Materials, ASTM STP 775. Philadelphia: American Society for Testing and Materials, 1982, pp.168-183.

26.

Singh S. and Greenhalgh E. Mixed-mode delamination growth in carbon-fiber composites under fatigue loading . Report DRA/SMC/CR961052/1.0 Defence Research Agency , 1996.

27.

Blanco N. , Gamstedt EK , Asp LE , et al. Mixed-mode delamination growth in carbon-fibre composite laminates under cyclic loading. Int J Solids Struct 2004; 41(15): 4219-4235.

28.

Kardonmateas GA , Pelegri AA and Malik B. Growth of internal delaminations under cyclic compression in composite plates. J Mech Phys Solids 1995; 43(6): 847-868.

29.

Ramdumar RL and Whitcomb JD Characterization of mode I and mixed-mode delamination growth in T300/5208 graphite/epoxy. In: Johnson WS (ed.) Delamination and debonding of materials ASTM STP 876. Philadelphia: American Society for Testing and Materials , 1985, pp.315-335.

30.

ASTM D6115-97. Standard test method for mode I fatigue delamination growth onset of unidirectional fiber-reinforced polymer matrix composites. Philadelphia: ASTM International, 2004.

31.

Laksimi A. , Ahmed Benyahia A. , Benzeggagh ML , et al. Initiation and bifurcation mechanisms of cracks in multidirectional laminates. Compos Sci Technol 2000; 60(4): 597-604.