Analytical and numerical study based on experimental investigation of different curved sandwich composites manufactured by filament winding process
Language
en
Article de revue
This item was published in
Journal of Composite Materials. 2018, vol. 52, n° 7, p. 891–917
SAGE Publications
English Abstract
Sandwich structures, due to their high stiffness versus lightness ratio, are used progressively in high performance products. In order to design these structures with the most appropriate dimensions and material combinations, ...Read more >
Sandwich structures, due to their high stiffness versus lightness ratio, are used progressively in high performance products. In order to design these structures with the most appropriate dimensions and material combinations, relevant mechanical properties must be well understood. This work aims to estimate the elastic properties of composite sandwiches from a curved structure taking into account the manufacturing process. In the case of filament winding process, specimens are necessarily cylindrical or barrel extracted. In our case, these types of structures are tested in 3- and 4-point bending to analyze their behavior experimentally using predictive models and design rules. Different conEgurations are adopted for bending tests to analyze and discuss global mechanical behavior. Furthermore, the acoustic emission technique is used to detect the initial appearance of damage mechanisms and to examine their evolution in terms of amplitude peaks and localization. Finally, a correlation between these acoustic emission signals and the damage initiation mechanisms is proposed, considering their effects on the mechanical behavior of each tested material.Read less <
English Keywords
Composite Materials
Curved sandwich structures
Filament Winding
Experimental analysis
Acoustic emission
Damage mechanics
Origin
Hal imported