Mode I delamination growth of multidirectional composite laminates under fatigue loading

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, GI/GIC, rather than GI. The experimental data also show that the fatigue threshold Gth is almost proportional to the corresponding GIC, that is Gth /GIC 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.

[1]  Gerald Pinter,et al.  Development of a standardized procedure for the characterization of interlaminar delamination propagation in advanced composites under fatigue mode I loading conditions , 2009 .

[2]  A. Canteli,et al.  Interlaminar crack initiation and growth rate in a carbon-fibre epoxy composite under mode-I fatigue loading , 2008 .

[3]  J. Botsis,et al.  Bridging tractions in mode I delamination: Measurements and simulations , 2008 .

[4]  Peter Davies,et al.  A status report on delamination resistance testing of polymer-matrix composites , 2008 .

[5]  Masaki Hojo,et al.  Mode I delamination fatigue properties of interlayer-toughened CF/epoxy laminates , 2006 .

[6]  A. Szekrényes,et al.  Advanced beam model for fiber-bridging in unidirectional composite double-cantilever beam specimens , 2005 .

[7]  A. Morais,et al.  2960 - MODE I INTERLAMINAR FRACTURE OF CARBON/EPOXY MULTIDIRECTIONAL LAMINATES , 2004 .

[8]  Leif Asp,et al.  Mixed-mode delamination growth in carbon-fibre composite laminates under cyclic loading , 2004 .

[9]  P.M.S.T. de Castro,et al.  Mode-I interlaminar fracture of carbon/epoxy cross-ply composites , 2002 .

[10]  Emile S. Greenhalgh,et al.  Delamination Growth and Thresholds in a Carbon/Epoxy Composite under Fatigue Loading , 2001 .

[11]  V. Tamužs,et al.  Progressive delamination and fiber bridging modeling in double cantilever beam composite specimens , 2001 .

[12]  M. Benzeggagh,et al.  Initiation and bifurcation mechanisms of cracks in multi-directional laminates , 2000 .

[13]  J. G. Williams,et al.  Delamination Fracture of Multidirectional Carbon-Fiber/Epoxy Composites under Mode I, Mode II and Mixed-Mode I/II Loading , 1999 .

[14]  Peter Davies,et al.  Standard Test Methods for Delamination Resistance of Composite Materials: Current Status , 1998 .

[15]  George A. Kardomateas,et al.  Growth of internal delaminations under cyclic compression in composite plates , 1994 .

[16]  C. Gustafson,et al.  Effect of matrix resin on delamination fatigue crack growth in CFRP laminates , 1994 .

[17]  J. G. Williams,et al.  The Effects of Geometry, Rate and Temperature on the Mode I, Mode II and Mixed-Mode I/II Interlaminar Fracture of Carbon-Fibre/Poly(ether-ether ketone) Composites , 1990 .

[18]  T. Adachi,et al.  Mode I fatigue delamination of Zanchor-reinforced CF/epoxy laminates , 2010 .

[19]  D. Le,et al.  A total fatigue life model for mode I delaminated composite laminates , 2006 .

[20]  Tong Earn Tay,et al.  Characterization and analysis of delamination fracture in composites: An overview of developments from 1990 to 2001 , 2003 .

[21]  F. Brandt.  New load introduction concept for improved and simplified delamination beam testing , 1998 .

[22]  J. Williams,et al.  Mechanics and mechanisms of delamination in a poly(ether sulphone)—Fibre composite , 1990 .

[23]  Masaki Hojo,et al.  Effect of stress ratio on near-threshold propagation of delimination fatigue cracks in unidirectional CFRP , 1987 .

[24]  John D. Whitcomb,et al.  Characterization of Mode I and mixed-mode delamination growth in T300/5208 graphite/epoxy , 1985 .

[25]  W. S. Johnson.  Delamination and Debonding of Materials , 1985 .

[26]  J. Eisenmann,et al.  Characterizing delamination growth in graphite-epoxy , 1982 .