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Analysis of Anisotropic Structures under Multiphysics Environment  

Kim, Jun-Sik (Department of Intelligent Mechanical Engineering, Kumoh National Institute of Technology)
Lee, Jae-Hun (School of Mechanical and Aerospace Engineering, Seoul National University)
Park, Jun-Young (Department of Mechanical Design Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.10, no.6, 2011 , pp. 140-145 More about this Journal
Abstract
An anisotropic beam model is proposed by employing an asymptotic expansion method for thermo-mechanical multiphysics environment. An asymptotic method based on virtual work is introduced first, and then the variables of mechanical displacement and temperature rise are asymptotically expanded by taking advantage of geometrical slenderness of elastic bodies. Subsequently substituting these expansions into the virtual work principle allows us to asymptotically expand the virtual work. This will yield a set of recursive virtual works from which two-dimensional microscopic and one-dimensional macroscopic equations are systematically derived at each order. In this way, homogenized stiffnesses and thermomechanical coupling coefficients are derived. To demonstrate the validity and efficiency of the proposed approach, composite beams are taken as a test-bed example. The results obtained herein are compared to those of three-dimensional finite element analysis.
Keywords
Multiphysics; Asymptotic Analysis; Thermoelasticity; Composite Beams;
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