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MECHANICAL AND TRANSIENT HYGROTHERMAL LOADING OF MULTILAYER ORTHOTROPIC CYLINDERS
Abstract
A method of solution for multilayer, multimaterial, orthotropic cylinders under static mechanical loading and transient hygrothermal loading has been developed. Stresses, strains, and radial displacements are calculated under loading conditions of internal and external pressure, axial load or axial strain, rotation, and temperature and moisture profiles which are considered to be transient in nature. The transient temperature and moisture profiles are developed using a finite difference method. The environmental temperatures and convection coefficients are allowed to vary with time. Physical properties are held constant. A method of solving for stresses, strains, and displacements in multilayered cylinders was developed using a unit displacement method. Exact solutions are developed for an individual layer, based on the displacement of the boundaries and applied forces. The unit displacement method is used in conjunction with the layer solutions to generate global stiffness and force matrices, which are solved for displacement of the layer boundaries. Using the boundary displacements, the stresses and strains in the radial, hoop, and meridional directions are calculated within each layer. The validity and accuracy of the solutions for hygrothermal profiles and for stresses and strains have been demonstrated by comparison with classical solutions and with solutions in the literature. Parametric studies were conducted to demonstrate the versatility of the solutions which have been developed.
Subject Area
Mechanics
Recommended Citation
NEWHOUSE, NORMAN L, "MECHANICAL AND TRANSIENT HYGROTHERMAL LOADING OF MULTILAYER ORTHOTROPIC CYLINDERS" (1984). ETD collection for University of Nebraska-Lincoln. AAI8423818.
https://digitalcommons.unl.edu/dissertations/AAI8423818