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S3 Ciências dos Materiais |
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Title:
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OPTIMIZATION OF COMPOSITE SHELLS
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Summary :
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ABSTRACT. IN THIS WORK WE PROPOSE AN ALGORITHM FOR THE ANALYSIS AND OPTIMIZATION OF COMPOSITE SHELL STRUCTURES. THE LAMINATE COMPOSITE MATERIAL IS FORMED BY THE SUPERPOSITION OF SEVERAL ORTHOTROPIC LAYERS, EACH CONSTITUTED BY UNIDIRECTIONAL FIBERS IN AN EPOXY MATRIX. THE LAMINATE IS MODELED THROUGH THE THEORY OF THE EQUIVALENT LAYER WHICH IS OBTAINED BY THE CLASSICAL RULE OF MIXTURES. HERE WE CONSIDER SHELLS OF DOUBLE CURVATURE WHICH ARE MODELED BY THE HIGHER ORDER THEORY PRESENTED BY (KANT,1982). THE OBJECTIVE, HERE, IS TO MINIMIZE THE WEIGHT OF THE STRUCTURE OBTAINING THE OPTIMUM THICKNESS AND FIBERS DIRECTIONS FOR EACH LAYER THAT FORMS THE LAMINATE. THE DESIGN VARIABLES ARE CONSIDERED TO HAVE SIDE CONSTRAINTS AND THE EFFECTIVE STRESSES, IN THE BARICENTER OF EACH ELEMENT, TO BE BOUNDED BY SOME ADMISSIBLE STRESS LIMIT.
KEY WORDS: COMPOSITE MATERIAL, SHELL, OPTIMIZATION
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Author :
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Alves, Marcelo Krajnc
Calixto, Alexandre Kaelble
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Paper View :
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