Mode I transverse intralaminar fracture in glass fiber-reinforced polymers with ductile matrices
| Autor: | Matthias Gössi, Francesco Bernasconi, Davi M. Montenegro, Rafael Libanori, André R. Studart, Markus Zogg, Konrad Wegener |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Fracture in polymers Glass fiber Composite number Fracture mechanics 02 engineering and technology Epoxy 021001 nanoscience & nanotechnology 020303 mechanical engineering & transports Fracture toughness 0203 mechanical engineering visual_art Ceramics and Composites Fracture (geology) visual_art.visual_art_medium Composite material 0210 nano-technology Damage tolerance Civil and Structural Engineering |
| Zdroj: | Composite Structures. 165:65-73 |
| ISSN: | 0263-8223 |
| DOI: | 10.1016/j.compstruct.2016.12.008 |
| Popis: | The fracture toughness of laminated composite materials is a very important property for damage-tolerant design, but remains poorly understood under transverse mechanical loading conditions. In this study, the transverse intralaminar fracture in unidirectional laminates with ductile polymer matrices is investigated. The presence of a ductile matrix calls for the use of concepts of nonlinear fracture mechanics for the accurate determination of the resistance of the composite to crack propagation. Unidirectional glass fiber-reinforced polymers with a polyurethane (PU) matrix are studied and compared to a benchmark epoxy (EP). The fracture toughness of these composites was evaluated through the determination of R-curves using the J-integral method, whereas the underlying fracture mechanisms were investigated through in situ testing in a scanning electron microscope. The results suggest stronger adhesion of the polyurethane matrix onto the glass fibers as compared to the epoxy-based polymer. This enables full exploitation of the ductile behavior of the PU matrix, ultimately endowing the laminate with outstanding fracture toughness. The investigated PU matrix has thus the potential to generate laminated composite parts with significantly higher damage tolerance than its epoxy counterpart. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect