A micromechanical approach to investigate the influence of voids on the structural behaviour of FRP under compression loading

Publikationstyp
Conference Paper
Date Issued
2015
Sprache
English
Author(s)
Liebig, Wilfried  orcid-logo
Schulte, Karl  
Fiedler, Bodo  orcid-logo
Institut
Kunststoffe und Verbundwerkstoffe M-11  
TORE-URI
http://hdl.handle.net/11420/6498
Volume
2015-July
Citation
ICCM International Conferences on Composite Materials: (2015)
Contribution to Conference
20th International Conference on Composite Materials, ICCM 2015  
The subject of this presentation is to develop a micromechanical approach to investigate the influence of voids on the structural behaviour of FRP under compression load. Therefore, the fibre-matrix-void constellation was analysed and a reduced model composite was conducted. The idea was to imitate a real void in a fibre-reinforced polymer where they appear between fibres and in resin rich areas. Elementary experimental and numerical studies were conducted due to the reduced model (two or more fibres and a unique void between). For the experiments a test jig was designed which fits in a light microscope with integrated photoelasticity and potential digital image correlation. While testing at different load steps the stress and strain material behaviour were analysed. Furthermore, the failure mechanisms (fibre-matrix debonding, fibre buckling and kinking) of the composite could be observed in situ. Numerical studies were compared with the test results. They included a detailed and step by step analysis of the failure mechanisms, especially of the premature fibre buckling.
Subjects
Compression
Failure modes
Micro structure
Photoelasticity
Voids
DDC Class
600: Technik