Abstract
This work focuses on the development of methods to measure the intralaminar fracture toughness of IM7/8552 CFRP at extreme temperatures. The size effect law of scaled double-edge-notched (DEN) specimens is used to obtain the crack resistance curves associated with longitudinal failure of polymer composites. The compressive and tensile crack resistance curves are determined and compared to those measured at room temperature. Scanning electron microscopy is used to analyse the fracture surface of tensile DEN specimens as a means to understand the damage mechanisms involved and their dependence on temperature variations. It is shown that the methods proposed enable the measurement of the crack resistance curve under different environment conditions. The results obtained can be used in analytical models to evaluate the integrity of composite structures at extreme temperatures.
| Original language | English |
|---|---|
| Pages (from-to) | 145-155 |
| Number of pages | 11 |
| Journal | Composites Part A: Applied Science and Manufacturing |
| Volume | 91 |
| Issue number | 1 |
| Early online date | 05 Oct 2016 |
| DOIs | |
| Publication status | Published - Dec 2016 |
Keywords
- Elastic properties
- Fibre reinforced materials
- Fracture mechanics
- Intralaminar fracture toughness
- Material characterisation
- R-curve
- Scanning electron microscopy
- Size effect
- Temperature
ASJC Scopus subject areas
- Ceramics and Composites
- Mechanics of Materials