Contributions to the Design of Neutral Cutouts in Laminated Plates and Shells

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University of Michigan., 1994 - Buckling (Mechanics) - 95 pages
The problem of designing a cutout and a suitable cutout edge reinforcement (termed neutral hole) in a load bearing structural member in the form of a plate or shell, such that the cut structure maintains its stress state with a minimal departure from the stress state of the uncut structure is addressed. A particular class of structural optimization for laminated thin walled structures is considered, in which the geometry of the structure is obtained as a solution to a particular problem, for known states of stress, strain, boundary conditions and appropriate constraints (sometimes called inverse problems in elasticity for some specific cases). Symmetrically laminated composite plates and circular cylindrical shells are considered. Plates are analyzed using classical lamination theory, and the Donnell shallow thin shell model is applied to investigate laminated shells.

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