The stabilizing effects of fiber bridges on delamination cracks

We investigate the extent to which the presence of a fiber bridge at a crack tip bears upon propagation due to local buckling of an existing crack in composite plates under compressive load. The model includes an assembly of beams with no limitation of the crack position in the thickness of the plate. We determine the material parameters of the fiber bridging by fitting the R curve obtained from experimental data. We perform an extensive parametric study which shows a strong stabilizing effect of the fiber bridge on the crack delamination.

[1]  K. Nilsson,et al.  On interface crack growth in composite plates , 1992 .

[2]  M. Ferry,et al.  Delamination and Fiber Bridging Modelling in Composite Samples , 1997 .

[3]  L. Carlsson,et al.  Beam analysis of angle-ply laminate DCB specimens , 1999 .

[4]  Y. Ousset.  Numerical simulation of delamination growth in layered composite plates , 1999 .

[5]  B. Storȧkers.  NONLINEAR ASPECTS OF DELAMINATION IN STRUCTURAL MEMBERS , 1989 .

[6]  Zhigang Suo,et al.  Delamination R-curve phenomena due to damage , 1992 .

[7]  Aditi Chattopadhyay,et al.  An experimental investigation of delamination buckling and postbuckling of composite laminates , 1999 .

[8]  Y. Mai,et al.  On the effects of stitching in CFRPs—II. Mode II delamination toughness , 1998 .

[9]  L. Rose.  Crack reinforcement by distributed springs , 1987 .

[10]  Michel Potier-Ferry,et al.  A numerical model for buckling and growth of delaminations in composite laminates , 1991 .

[11]  Z. Suo,et al.  Interface crack between two elastic layers , 1990 .

[12]  L. Gornet.  Simulation des endommagements et de la rupture dans les composites stratifies , 1996 .

[13]  H. Nguyen-Dang,et al.  Imperfect interlaminar interfaces in laminated composites: delamination with the R-curve effect , 2000 .

[14]  Alberto Carpinteri,et al.  Continuous vs discontinuous bridged-crack model for fiber-reinforced materials in flexure , 1997 .

[15]  Z. Suo,et al.  Mixed mode cracking in layered materials , 1991 .

[16]  O. Allix,et al.  Interlaminar interface modelling for the prediction of delamination , 1992 .

[17]  P. Panagiotopoulos,et al.  Delamination of composites as a substationarity problem: Numerical approximation and algorithms , 1993 .

[18]  Alberto Corigliano,et al.  Geometrical and interfacial non-linearities in the analysis of delamination in composites , 1999 .

[19]  Claude Stolz,et al.  Mechanical transformations and discontinuities along a moving surface , 1995 .

[20]  D. Hull,et al.  Effects of fibre bridging on GIC of a unidirectional glass/epoxy composite , 1989 .

[21]  P. Robinson,et al.  A Modified DCB Specimen for Mode I Testing of Multidirectional Laminates , 1992 .