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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Analise de estruturas sanduiche : parametros de projeto / Sandwich structures analysis : design parameters

Gagliardo, Debora Pierini 21 August 2008 (has links)
Orientador: Nilson Tadeu Mascia / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo / Made available in DSpace on 2018-08-11T20:02:44Z (GMT). No. of bitstreams: 1 Gagliardo_DeboraPierini_M.pdf: 2748592 bytes, checksum: 3f4f2274fa55f9b27f8663ca912c32fc (MD5) Previous issue date: 2008 / Resumo: As estruturas sanduíche têm despertado grande interesse e já estão bastante difundidas em diversos segmentos industriais, sendo suas principais utilizações nas indústrias aeroespacial, militar, naval e civil. Este fato se deve à sua propriedade de combinar alta rigidez à flexão e baixo peso, resultando em uma estrutura muito eficiente. Neste sentido, a análise e cálculo das estruturas sanduíche são de extrema importância no desenvolvimento de projetos de aplicação do mesmo. Neste trabalho, foram analisados os critérios de falha dos painéis, bem como os materiais e suas propriedades mecânicas, considerando as alterações e considerações que devem ser feitas nos projetos de acordo com as características do material. Na parte final dessa pesquisa, são apresentadas a teoria de cálculo e a rotina para elaboração de projetos relacionados com a construção civil utilizando as estruturas sanduíche, com ênfase em estruturas planas, tais como vigas e placas. Por fim emprega-se uma ferramenta, planilha eletrônica, para analisar e avaliar a aplicação de diversos materiais de construção em estruturas sanduíche. / Abstract: The sandwich structures have aroused great interest and have already been very widespread in several branches in industries, such as in the aerospace, military, naval and civil construction industries. This is due to their property to combine both high bending rigidity and the low weight, resulting in a very efficient structure. Thus, the analysis and also the calculation of sandwich structures are very important in developing the application projects. In this work, it was reviewed the failure criteria of the panels, as well as the materials and their mechanical properties, considering the changes and considerations that have to be performed in the project in accordance with the characteristics of the material. At the final part of this research, the theory of calculation and also the routine for development projects related with the civil construction using the sandwich structures are presented, with emphasis on flat structures, such as beams and plates. Finally employs is a tool, spreadsheet, to analyse and evaluate the implementation of various building materials in sandwich structures. / Mestrado / Estruturas / Mestre em Engenharia Civil
2

Statická analýza spoje dřevěné konstrukce / Static analysis of one joint of timber structure

Sedlák, Petr January 2015 (has links)
This diploma thesis deals with the numerical modeling of the nail joint of the timber roof structure and it is based on the already realized physical experiment. Totally twelve various solutions, where the isotropic and ortotropic characteristics of the spruce timber and steel components change, have been created. The final values of the joint shift obtained by using of the numerical modeling are compared with results of physical experiment. Program system ANSYS is used.

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