Nonlinear Theory for Flexural Motions of Thin Elastic Plate—Part 2: Boundary-Layer Theory Near the Edge

[+] Author and Article Information
N. Sugimoto

Department of Mechanical Engineering, Osaka University, Toyonaka, Osaka 560, Japan

J. Appl. Mech 48(2), 383-390 (Jun 01, 1981) (8 pages) doi:10.1115/1.3157627 History: Received December 01, 1979; Revised August 01, 1980; Online July 21, 2009


This paper deals with, as a continuation of Part 1 of this series, the boundary-layer theory for flexural motions of a thin elastic plate. In the framework of the higher-order theory developed in Part 1, three independent boundary conditions at the edge of the plate are too many to be imposed on the essentially fourth order differential equations. To overcome this difficulty, a boundary layer appearing in a narrow region adjacent to the edge is introduced. Using the matched asymptotic expansion method, uniformly valid solutions for a full plate problem are sought. The boundary-layer problem consists of the torsion problem and the plane problem. Three types of the edge conditions are treated, the built-in edge, the free edge, and the hinged edge. Depending on the type of edge condition, the nature of the boundary layer is characterized. After solving the boundary-layer problem, “reduced” boundary conditions relevant to the higher-order theory are established.

Copyright © 1981 by ASME
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