TY - JOUR
T1 - Study of mode-I interlaminar crack growth in DCB specimens of fibre-reinforced composites
AU - Todo, M.
AU - Jar, P. Y.B.
N1 - Funding Information:
This project was supported by the Australian Research Council under the Large Grant scheme. The authors would like to thank Mr Roger Heady of the Electron Microscopy Unit and Mr Paul Compston of the Department of Engineering at Australian National University (ANU) for their assistance in the SEM operation. M.T. would also like to acknowledge Kyushu University and ANU for support of his outside study programme at ANU, during which the FEM work was carried out.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1998
Y1 - 1998
N2 - Two- and three-dimensional finite-element analyses have been carried out to investigate interlaminar crack growth in composite double-cantilever beam (DCB) specimens. The results revealed that crack-tip bluntness causes multiple stress concentrations along the crack contour. By increasing the bluntness, the highest stress point moves from the tip towards the corner along the crack contour. This increases possibility of crack growth towards the fibre/matrix interface. The results also show relatively high tensile stress along the interface near the insert film, suggesting that for DCB specimens with a weak fibre/ matrix interface, a crack is likely to start at the interface, not from the insert film. Experimental evidence supporting the analytical results was obtained by scanning electron microscopy of the fracture of glass-fibre composites. The study concludes that crack-tip bluntness has an important role in initial crack growth in DCB specimens, and should be considered for design of interlaminar fracture testing of composites.
AB - Two- and three-dimensional finite-element analyses have been carried out to investigate interlaminar crack growth in composite double-cantilever beam (DCB) specimens. The results revealed that crack-tip bluntness causes multiple stress concentrations along the crack contour. By increasing the bluntness, the highest stress point moves from the tip towards the corner along the crack contour. This increases possibility of crack growth towards the fibre/matrix interface. The results also show relatively high tensile stress along the interface near the insert film, suggesting that for DCB specimens with a weak fibre/ matrix interface, a crack is likely to start at the interface, not from the insert film. Experimental evidence supporting the analytical results was obtained by scanning electron microscopy of the fracture of glass-fibre composites. The study concludes that crack-tip bluntness has an important role in initial crack growth in DCB specimens, and should be considered for design of interlaminar fracture testing of composites.
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U2 - 10.1016/S0266-3538(97)00102-4
DO - 10.1016/S0266-3538(97)00102-4
M3 - Article
AN - SCOPUS:0031972475
SN - 0266-3538
VL - 58
SP - 105
EP - 118
JO - Composites Science and Technology
JF - Composites Science and Technology
IS - 1
ER -