Impact response of thick composite plates under uniaxial tensile preloading

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 ð½0=45=90= À 45 2 Þ 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.

Experimental and numerical analysis of low velocity impact on a preloaded composite plate

“…Some of these researchers focus on plates forced uniaxial or biaxial in-plane load, uniaxial tensile [7][8][9], biaxial tensile [11], uniaxial tensile and biaxial tensile-compressive (shear) [10] subjected to low velocity impacts.…”

“…A relatively small number of researchers have analyzed the behavior of preloaded structures subjected to low-velocity impact, the researchers studied experimental [6][7][8][9][10][11], numerical [12][13][14] both experimental and numerical [15][16][17] which discuss the impact response of different composite laminates. Some of these researchers focus on plates forced uniaxial or biaxial in-plane load, uniaxial tensile [7][8][9], biaxial tensile [11], uniaxial tensile and biaxial tensile-compressive (shear) [10] subjected to low velocity impacts.…”

Low-velocity impact tests on carbon/epoxy composite laminates: A benchmark study

“…Clearly, the resulting damage scenarios and consequently the strength of the damaged structure can depend on many testing parameters such as the clamping conditions, the dimensions of the impactor tip and the impactor mass [2] [3]. As an example, [4] presents the results of an investigation on the mechanical response and on the delamination extension on quasi-isotropic thick composite plates subjected to uniaxial tension preload.…”

Detection of Impact Damage in Carbon Fiber Composites Using an Electromagnetic Sensor

“…The sensor is associated with an encoder that determines its position and enables spatial mapping across the specimen surface [26]. Water was used as the transmission medium in the test.…”