Abstract
The aim of this work is to study the influence of ply orientation on the fracture toughness of thick E-glass/polyester woven fabric composites laminates. Two different types of laminates were fabricated with different ply orientations: (i) balanced: plain weave (taffetas T) and (ii) unbalanced: 4-hardness satin weave (S). Experiments were conducted using standards delamination tests under mixed mode loading using MMF tests under static conditions. The experimental results have been expressed in terms of total strain energy release rate and R-curves. We remark that the critical fracture toughness depends on the ply orientations and its maximum value is reached for a ply orientation +45°/-45°.KeywordsE-glass/polyesterWoven fabricsDelaminationMMFR-curve
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