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Buckling analysis of laminated composite plates submitted to compression after impact |
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| Authors: | A M Amaro P N B Reis M F S F de Moura M A Neto |
| Institution: | 3. CEMUC; Department of Mechanical Engineering, University of Coimbra, Pinhal de Marrocos, 3030, Coimbra, Portugal 1. Department of Electromechanical Engineering, University of Beira Interior — UBI, 6200, Covilh?, Portugal 2. Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal |
| Abstract: | The aim of this work is the experimental evaluation of the residual strength of composite laminates under compression after low velocity impact. Different kinds of delaminations, partial, embedded and through-the-width, were studied. Carbon-fibre reinforced epoxy composite was used and the experimental tests were performed on 0]16, 0, 90, 0, 90]2S and 0i, 90i]s with i=2, 3, 4, 5, using a drop-weight-testing machine. The impacted plates were inspected by the ultrasonic C-Scan to evaluate the size and the shape of the delamination. Results show that the presence of delamination decreases the compressive strength. The stacking sequence and laminate thickness were verified to have a remarkable influence on the value of the residual compressive strength, and play an important role on the observed buckling failure modes. |
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