Impact response of thick composite plates under uniaxial tensile preloading. (March 2015)

• Record Type: Journal Article
• Authors: Guillaud, N.; Froustey, C.; Dau, F.; Viot, P.
• Is Part Of: Composite structures. Volume 121(2015)
• Page Start: 172
• Page End: 181
• Publication Date: 2015-03
• Subjects: Composites -- Carbon fibers -- Low-velocity impact -- Preloading -- Thick plate; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2014.11.021
• Languages: English
• ISSNs: 0263-8223

Abstract

Abstract: This work focuses on the impact response of composite plates 5 mm thick subjected to uniaxial tension preload. Laminated carbon/epoxy with quasi-isotropic stacking sequence ( [ 0 / 45 / 90 / - 45 ] 2 ) S samples were used. Doehlert-type design of experiments was proposed to investigate the influence of both preload and impact energy on impact composite responses. Deformation, varying from 300 to 3000 micro-strain, was imposed thanks to a preload device designed for this purpose. Impacts were generated using a home made drop tower. Imposed impact energy was varying from 30 to 214 J. Post-impact damage was characterized by both non-destructive (ultrasound) and destructive (deply) techniques. Influence of the preloading on delamination areas (total and projected) was quantified and found sensitive to the preloading.