Publisher DOI: 10.1016/j.compscitech.2013.04.011
Title: Photoelastic study of stresses in the vicinity of a unique void in a fibre-reinforced model composite under compression
Language: English
Authors: Liebig, Wilfried  
Leopold, Christian  
Schulte, Karl 
Keywords: Fibre/matrix bond;Porosity/voids;Stress concentrations;Photoelasticity
Issue Date: 25-Apr-2013
Publisher: Elsevier
Source: Composites Science and Technology (84): 72-77 (2013)
Journal: Composites science and technology 
Abstract (english): 
The subject of this work is the investigation of the stress field around a unique void in a fibre-reinforced model composite under compression. Voids were introduced into the epoxy material by injection. The idea was to imitate a real void in fibre reinforced plastics (FRP) where voids appear between fibres and in resin rich areas. To investigate the mechanical response of the composite material under compression, a test jig was designed, which fits into a light microscope with an integrated photoelasticity device. That way in situ measurements were conducted. It could be demonstrated, that voids have a significant influence on the stress distribution in the matrix which leads to stress concentrations particularly around the end caps and the longitudinal side of the voids. Furthermore, different failure mechanisms like fibre matrix debonding and fibre buckling could be observed. © 2013 Elsevier Ltd.
ISSN: 1879-1050
Institute: Kunststoffe und Verbundwerkstoffe M-11 
Document Type: Article
Project: More Affordable Aircraft structure through eXtended, Integrated, and Mature nUmerical Sizing 
More Funding information: European Community’s Seventh Framework Programme FP7/2007-2013, MAAXIMUS
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