Abstract
The fracture energy of a glass fibre-polyester composite has been measured by work of fracture (γ f) measurements on bending beams, and by linear elastic fracture mechanics analyses (γ i) of the bending beams and edge-notched tensile plates. It was found that for the bend specimens γ i< γ f. The work of fracture, γ f, displayed a strain rate dependence, but there was no such dependence of γ i. It is postulated that γ i is determined by a debonding mechanism while γ f is the sum of a debonding mechanism plus a pull-out contribution. The edge-notched tensile plate experiments showed that γ i obtained from thick plates was less than that obtained from side-grooved plates, and that in each case there was a dependence of γ i on crack size.
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Beaumont, P.W.R., Phillips, D.C. The fracture energy of a glass fibre composite. J Mater Sci 7, 682–686 (1972). https://doi.org/10.1007/BF00549380
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DOI: https://doi.org/10.1007/BF00549380