Experimental characterization and modeling of the temperature and rate-dependent shear behaviour of powder-impregnated glass fiber/PA66 woven semipregs. (18th August 2019)

• Record Type: Journal Article
• Authors: Baumard, Théo; Menary, Gary; De Almeida, Olivier; Martin, Peter; Schmidt, Fabrice; Bikard, Jérôme
• Is Part Of: Composites science and technology. Volume 180(2019)
• Page Start: 23
• Page End: 32
• Publication Date: 2019-08-18
• Subjects: Fabrics/textiles -- Semipreg -- Thermomechanical properties -- Finite element analysis (FEA); Composite materials -- Periodicals; Composite materials; Fibrous composites; Periodicals; 620.118
• DOI: 10.1016/j.compscitech.2019.05.011
• Languages: English
• ISSNs: 0266-3538

Abstract

Abstract: This study focuses on the characterization of the in-plane shear response of a novel powder-impregnated, non-consolidated PA66/glass semipreg to evaluate its forming behaviour. The effects of temperature and rate on the behaviour of the semipreg and the preconsolidated material were investigated using bias-extension tests. Results obtained show an increase in shear stress with decreasing temperature and increasing rate, with the semipreg exhibiting a lower sensitivity to the test speed. An increase of the flow distance to impregnate the yarns, due to intra-ply sliding mechanisms specific to the powder-impregnated semipreg, is observed. A model based on a hypoelastic approach with temperature and rate dependence is proposed to represent the material behaviour. Isothermal simulations of the bias-extension test are conducted. Results show a good agreement between the model and experimental data in terms of force and shear angle prediction.