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Mode III interlaminar fracture of carbon/epoxy laminates using the Six-Point Edge Crack Torsion (6ECT) |
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| Authors: | A.B. de Morais A.B. Pereira M.F.S.F. de Moura |
| Affiliation: | aUniversity of Aveiro, Department of Mechanical Engineering, Campus Santiago, 3810-193 Aveiro, Portugal;bUniversity of Porto, Faculty of Engineering, Department of Mechanical Engineering, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal |
| Abstract: | The recently proposed Six-Point Edge Crack Torsion (6ECT) test was used to evaluate the mode III interlaminar fracture of carbon/epoxy laminates. Plate specimens with starter delaminations in 0/0, 0/90 and 0/45 interfaces were tested. Data reduction was performed with an effective crack scheme validated in a previous numerical study. The tests allowed the evaluation of fairly unambiguous initiation GIIIC values and of subsequent R-curves. Examinations of specimen cross-section showed considerable lengths of pure interlaminar propagation in specimens with starter delaminations in 0/90 and 0/45 interfaces. The latter specimens had the lowest initiation GIIIC values. |
| Keywords: | A. Polymer-matrix composites (PMCs) B. Delamination B. Fracture toughness D. Mechanical testing |
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