An experimental study of fibre waviness and its effects on compressive properties of unidirectional NCF composites
| Autor: | Leif Asp, Dennis Wilhelmsson, Fredrik Edgren, Renaud Gutkin |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Waviness Composite number Stiffness 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Longitudinal direction body regions Mechanics of Materials Ceramics and Composites medicine Composite material medicine.symptom 0210 nano-technology Transverse direction |
| Zdroj: | Composites Part A: Applied Science and Manufacturing. 107:665-674 |
| ISSN: | 1359-835X |
| DOI: | 10.1016/j.compositesa.2018.02.013 |
| Popis: | In this paper a comprehensive experimental study on effects of different fibre waviness characteristics on the compressive properties of unidirectional non-crimp fabrics (NCF) composites is presented. The fibre waviness ranges from periodic to random with medium to large misalignment angles. As expected, fibre waviness is found to strongly impair the compressive mechanical properties of the composite. It is demonstrated that the maximum fibre misalignment alone can be used to accurately predict strength with analytical kinking criteria. Furthermore, there is a direct correlation between waviness and a knock-down factor on stiffness with approximately 5%/degree mean fibre misalignment angle. Analysis of the extension of the misaligned regions (defects) provides additional evidence that defect extension in the transverse direction is more critical than in the longitudinal direction, supporting earlier theoretical predictions in the open literature. |
| Databáze: | OpenAIRE |
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