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144 Novel experimental design for two-dimensional delamination in fiber-reinforced polymer laminates
Aida Cameselle-Molares, Anastasios P. Vassilopoulos, Thomas Keller
Composite Construction Laboratory (CCLab), École Polytechnique Fédérale de Lausanne (EPFL)

Published: 30 May 2018 by MDPI AG in The Eighteenth International Conference of Experimental Mechanics in The Eighteenth International Conference of Experimental Mechanics session ICEM 2018
MDPI AG, Volume 2; 10.3390/ICEM18-05283

The two-dimensional (2D) delamination behavior of composite laminates under quasi-static out-of-plane opening loads has been experimentally investigated. A novel design and experimental set-up for fiber-reinforced polymer (FRP) laminated plates with a circular embedded pre-crack was developed. Increasing load-displacement curves were obtained due to the increasing crack front length during propagation. Throughout the loading process, stiffening and softening mechanisms were activated. The stretching of delaminated part of the laminates constituted the main stiffening mechanism. Once the crack started growing, a corresponding softening due to crack propagation occurred together with a secondary stiffening mechanism, fiber-bridging. These stiffness-related mechanisms were reflected in the compliance.

Keywords: laminates, Embedded pre-crack, two-dimensional delamination
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