Exact elastic analysis of a doubly coated thick circular plate using functionally graded interlayers

Abstract

Development of new coating systems has been an important issue over the years with the motivation\ud of extending the effective life of mechanical elements. For this intent, functionally graded materials have\ud been recently used in a variety of applications as promising replacements for conventional coatings. In the\ud present study, a hybrid coating system taking advantage of graded composition concept is proposed to enhance\ud the through-thickness stress distribution within a double-sided coated circular thick homogeneous plate. The\ud coating system is composed of two main layers: an external homogeneous layer and an interlayer between\ud the external layer and the plate, with graded material composition. All layers are modeled within the context\ud of three-dimensional elasticity theory, and an elasto-static solution is obtained by using suitable potential\ud functions.Accuracy and reliability of the proposed analysis is investigated by comparison with results obtained\ud in the literature, as well as with the results of a three-dimensional finite element simulation. Comparative study\ud shows the inherent advantages of the present hybrid coating system over the conventional homogeneous coating\ud or the functionally graded coating layers

RVE-based grading of truss lattice cores in sandwich panels

“…Tailoring core properties using additive manufacturing to fabricate graded cores may improve the stiffness, impact resistance, and energy absorption of sandwich panels [19][20][21][22][23]. In particular, grading the core to prevent core failure due to locally concentrated loads is of paramount importance [24,25]. During flexural tests, such lattice core failure in load application areas was observed by [26][27][28][29].…”