Picture frame experiment and analytical model of the pre-impregnated woven fabric composite

Wei Wang; Liping Sun

doi:10.1117/12.851297

14 April 2010 Picture frame experiment and analytical model of the pre-impregnated woven fabric composite

Wei Wang, Liping Sun

Proceedings Volume 7522, Fourth International Conference on Experimental Mechanics; 75223M (2010) https://doi.org/10.1117/12.851297
Event: Fourth International Conference on Experimental Mechanics, 2009, Singapore, Singapore

Abstract

Pre-impregnated woven fabric composite (PWFC) is a kind of visco-elastic material which requires picture frame experiment, a sort of useful material characterization methodology, to test the shear properties. The PWFC specimen used in the experiment is 165mm×165mm minus a 25mm×25mm square at each corner in order to allow free motion of the frame. The screw Instron is applied to provide a constant displacement rate. Thus, load-displacement curve is obtained. Through analysis of every constituent mutual interaction and deformation mechanism of the PWFC, the shear deformation is divided by shear and compaction phases and a picture frame analytical model is developed to account for large shear deformation, as well as to calculate the stress and stiffness of the fabric according to different phases. The model includes the resin damping function and the crossover friction of the warp and weft tows in the shearing phase. In the compaction phase, resin will be driven from the inter-tow region and the tows are interacted. Consequently, a lateral compaction shear resistance moment is occurred. The picture frame experiment curve is used to verify the analytical model curve and the two curves are in good agreement.

Citation Download Citation

Wei Wang and Liping Sun "Picture frame experiment and analytical model of the pre-impregnated woven fabric composite", Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 75223M (14 April 2010); https://doi.org/10.1117/12.851297

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