Effect of Two-Dimensional Grading on the Thermomechanical Response of the Panel

Abstract

Some of the advantages of functionally graded materials (FGM) are related to their ability to provide a better thermal protection and reduce delamination tendencies present in layered composites. In particular, in ceramic-metal systems these goals can be achieved by increasing the concentration of ceramic particles in the region adjacent to the heated surface using a heterogeneous single layered structure. The unfortunate by-products of such design are asymmetry about the middle surface of the structure and bending-stretching coupling. As a result, displacements and stresses increase as compared to the symmetric counterpart, while the buckling loads and natural frequencies decrease. One of the possible solutions to the problem compensating for a reduced stiffness of FGM structures is based on the replacement of one-dimensional grading with a two-dimensional grading, including the regions with enhanced stiffness. The paper illustrates the formulation of the problem and peculiarities introduced in the solution by two-dimensional grading on the example of a large aspect ratio panel subject to thermomechanical loading. ©2008 American Institute of Physics

Department(s)

Mechanical and Aerospace Engineering

Keywords and Phrases

Functionally Graded Materials; Heat Conduction; Materials Properties

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2008 American Institute of Physics (AIP), All rights reserved.

Publication Date

01 Feb 2008

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