Análise dinâmica com recuperação de tensões para materiais com gradação funcional: simulação numérica e validação experimental

• Ano de defesa: 2007
• Autor(a) principal: Fraga Filho, Carlos Alberto Dutra
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Espírito Santo; BR; Mestrado em Engenharia Mecânica; Centro Tecnológico; UFES; Programa de Pós-Graduação em Engenharia Mecânica
• Palavras-chave em Português: Materiais compostos; Programas de computador - Validação; Materiais - Especificações; Materiais - Estudos experimentais; Modelos matemáticos; Simulação (Computadores); Engenharia Mecânica; 621
• Link de acesso: http://repositorio.ufes.br/handle/10/4171

The objective of this work was to design and the manufacture samples of materials withbehaviors, under mechanical loads, similar to functionally graded materials (with continuousvariation of the structural properties); to perform dynamic mechanical experiments, with theproduced samples; and to obtain results of simulation for dynamic loads, in order to validatea numerical model proposed by researchers of this university for the characterization of thefunctionally graded materials.The study it was divided in the following phases: confection of the specimens, adoptionof the composed beam model for the produced specimens, preparation and realization ofdynamic mechanical experiments, obtention of analytical results for the vibration problem,definition of the numerical model applied to the problem and numerical simulation ofmechanical loads.The experimental, analytical and numerical results show similar behavior for all testedspecimens. The natural vibration frequency, despite the method of obtention (experimentalmeasurement, analytical development, numerical simulation), difers at most by 15,4313%.The proposed numerical technique is found, thus, to be adequate to the modeling of layeredmaterials