Crashworthiness and Impact Energy Absorption Study Considering the CF/PA Commingled Composite Processing Optimization
AUTOR(ES)
Di Benedetto, Ricardo Mello, Raponi, Olívia de Andrade, Junqueira, Diego Morais, Ancelotti Junior, Antonio Carlos
FONTE
Mat. Res.
DATA DE PUBLICAÇÃO
22/01/2018
RESUMO
The processing of the thermoplastic composites can cause matrix thermo-oxidative degradation. Understanding the level of thermo-oxidative degradation, as well as the thresholds of temperature and processing time, allows the manufacture of high performance composites with higher crashworthiness. This study evaluated the matrix thermo-oxidative degradation by Friedman's isoconversional kinetic model to a carbon fiber/polyamide (CF/PA) commingled fabric. In addition, the CF/PA commingled composite was manufactured by consolidation under pressure at 240°C, 250°C, 260°C, 270°C and 280°C to observe the influence of the matrix thermo-oxidative degradation on its energy absorption capacity. Impact test and compression after impact (CAI) determined the energy absorbed by the CF/PA commingled composite at different processing temperatures. The results demonstrated that the matrix thermo-oxidative degradation affected the energy absorption capacity of the CF/PA composite when the processing temperature exceeded 260°C, which is in accordance with the prediction of the degradation study. Therefore, the optimal processing cycle occurs at 260°C for 20min. When it processed in temperatures above 260°C, the CF/PA commingled composite reduces in 0.14J/°C the energy absorption ability due to the matrix degradation in high temperatures, leading to a considerable reduction on crashworthiness and its performance.
Documentos Relacionados
- Manufacturing and Characterization of Jute/PP Thermoplastic Commingled Composite
- Experimental study of impact energy absorption in aluminium square tubes with thermal triggers
- Energy absorption of aluminum panels subjected to gelatin projectile impact
- Crashworthiness Analysis and Evaluation of Fuselage Section with Sub-floor Composite Sinusoidal Specimens
- Finite Element Analysis and Crashworthiness Optimization of Foam-filled Double Circular under Oblique Loading