Title: A micromechanical approach to investigate the influence of voids on the structural behaviour of FRP under compression loading
Language: English
Authors: Liebig, Wilfried  
Schulte, Karl 
Fiedler, Bodo  
Keywords: Compression;Failure modes;Micro structure;Photoelasticity;Voids
Issue Date: 2015
Source: ICCM International Conferences on Composite Materials (2015-July): (2015)
Abstract (english): 
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.
Conference: 20th International Conference on Composite Materials, ICCM 2015 
URI: http://hdl.handle.net/11420/6498
Institute: Kunststoffe und Verbundwerkstoffe M-11 
Document Type: Chapter/Article (Proceedings)
Project: More Affordable Aircraft structure through eXtended, Integrated, and Mature nUmerical Sizing 
More Funding information: Funding from the European Commission (European Community's Seventh Framework Programme FP7/2007-2013, MAAXIMUS).
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