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International Journal of Forming Processes
1292-7775
Publication suspended
 

 ARTICLE VOL 8/SI - 2005  - pp.157-167
TITLE
Meso-Macro Optical Experimental Analysis of Woven Composite Reinforcement in Plane Shear during their Forming

ABSTRACT
The in-plane shear behaviour is important in woven composite reinforcement forming processes. It is the largest strain mode when forming a double curved surface. The shear locking angle is a limit to the feasibility of a given shape. This paper presents an experimental study of this in-plane shear mechanical behaviour using a picture frame device and strain optical analyses. These measurements are based on a correlation method and are performed both at macro scale (scale of the picture frame) and at meso-scale (scale of the yarn). The first measures permit to check the uniformity of the strain field and to choose between different technologies and especially the clamping devices. The local analysis shows that the strains within the yarn are very different to the global strain. The yarn is mainly submitted to rigid rotation before the shear locking angle and crushed after. Shear in plane curves are especially given in this study for fabric chosen in the ESAFORM benchmark on composite forming.


AUTEUR(S)
Gilles HIVET, Jean LAUNAY, Philippe BOISSE

KEYWORDS
Fibre Fabric Forming, in Plane Shear, Picture Frame, Meso-Macro Analysis, Optical Measures, Image Correlation.

LANGUE DE L'ARTICLE
Anglais

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