Dynamic delamination fracture toughness of a graphite/epoxy laminate under impact

Abstract Dynamic delamination fracture toughness in a [90/0] 5s T300/934 graphite/epoxy laminate was investigated using impact loading. Delamination cracks of three different sizes were embedded at the mid-plane of the composite specimen. The threshold impact velocity that causes propagation of the delamination crack was used in the dynamic analysis with the finite element method. From the finite element solution, the time-history of the strain energy release rate was calculated. The critical strain energy release rate was taken to equal the maximum value of the response history.

[1]  J. H. Crews,et al.  Debond propagation in composite-reinforced metals , 1975 .

[2]  A.S.D. Wang,et al.  Initiation and Growth of Transverse Cracks and Edge Delamination in Composite Laminates Part 1. An Energy Method , 1980 .

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

[4]  E. F. Rybicki,et al.  An Energy Release Rate Approach For Stable Crack Growth in the Free-Edge Delamination Problem , 1977 .

[5]  J. Eisenmann,et al.  An Analytical and Experimental Investigation of Edge Delamination in Composite Laminates , 1980 .

[6]  T. O'Brien.  Characterization of delamination onset and growth in a composite laminate , 1982 .

[7]  John H. Crews,et al.  Interlaminar stress singularities at a straight free edge in composite laminates , 1981 .

[8]  A.S.D. Wang,et al.  The Dependence of Transverse Cracking and Delamination on Ply Thickness in Graphite/Epoxy Laminates , 1982 .

[9]  G. Irwin,et al.  Crack-Velocity Considerations , 1965 .

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

[11]  Joseph E. Grady,et al.  Dynamic delamination crack propagation in a graphite/epoxy laminate , 1986 .

[12]  M. F. Kanninen,et al.  An augmented double cantilever beam model for studying crack propagation and arrest , 1973, International Journal of Fracture.

[13]  C. Sun,et al.  Use of Statical Indentation Laws in the Impact Analysis of Laminated Composite Plates , 1985 .

[14]  C. Sun,et al.  Indentation Law for Composite Laminates. , 1982 .

[15]  J. Rice,et al.  Elementary engineering fracture mechanics , 1974 .