KEYWORDS: High power lasers, Composites, Polymers, Digital image correlation, Polyurethane, Cameras, Optical coatings, Reflectivity, 3D image processing
In this experimental study we present full methodology for investigation and evaluation of high power laser induced damage and its influence on structural integrity of polymer structural sandwich composites (PSSC) samples covered with various colour paint coatings. The work includes in-situ quantitative monitoring of out-of-plane and in-plane displacements and strains by 3D digital image correlation and temperature fields - by thermovision. The experiments are supported by material reflectance studies and post-mortem, microscopic crater investigations. Conclusions concerning influence of structural core and colour coating on PSSC performance, their structural integrity and laser lethality are presented.
KEYWORDS: Composites, High power lasers, Digital image correlation, Laser processing, 3D metrology, Laser-matter interactions, Metrology, Solid state lasers, Solid state electronics, Manufacturing
In this paper we present the results of systematic investigations of interaction between high power near-IR laser beam and composite material samples composed of sandwich structures of structural composites of Fiber Reinforced Polymer. Sandwiches of carbon and glass fabric woven|/epoxy resin shells and foam core as well as carbon reinforced/epoxy laminate have been tested. The experiments are performed by means of high speed 3D digital image correlation and thermographic methods. The studies allow to estimate the symptoms and results of damage effects against composite material targets such as an UAV’s airframe shell.
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