Analise do sistema de medição em peças aeronaúticas através do estudo de R&R (repetibilidade e reprodutibilidade)

The Measurement System Analysis (MSA - Measurement System Analysis) is a statistical methodology developed to study and analyze the behavior of the measurement systems, and, therefore, allow the increased of the confidence readings performed by measuring instruments. It’s widely used in the automotive industry since the 90’s and is a mandatory requirement for the approval of the parts according to ISO Standard of the automotive sector. However, the aerospace industry doesn’t require this type of Study, once which the vast majority of aeronautics parts have characteristics (dimensions) with very tight tolerances, closed, ie, at the home of microns. This work aims to create lists of recommendations for definitions of measuring instruments in developing of control plans, which correlates tolerances fields of characteristics for different settings and acceptance of the instrument, classified as optimum, recommended and not recommended, through of the study of R&R (Repeatability and Reproducibility) in aeronautics parts. Every methodology of the experimental part was based on modern strategy of continuous improvement, the DMAIC (Define Measure Analyze Implant Control), in order to achieve better measurement method used in the control of milling aeronautics parts, identifying and reducing the variations of the measurement process. The results of the R&R Study in large part of measuring instrument manuals were considered acceptable and/or recommended, ie with values of %P/T and %RR lower than 30%, providing statistical data which have enabled the elaboration of tables of recommendations, which, from this work, have turned into very important documents and aid for Process Engineering, having in their hands a technical study able to identify which is the most appropriate instrument to get a more robust dimensional... (Complete abstract click electronic access below)

Projeto e análise de um sistema de ancoragem para um motor foguete a combustível líquido

This work aims the design and analysis of a thrust frame system for a liquid fuel rocket engine. The project was developed following the design requirements established by the Division of Space Propulsion of the Institute of Aeronautics and Space. The layout of the structure was developed with the aid of a software of 3D modeling and static and dynamic analysis were performed by using a finite element package. The results of the analyzes helped in defining the layout of the structure which met all design requirements. The safety factor and the mass achieved were comfortably low, which may be useful in the future because the liquid fuel rocket engine is still in development

Estudo do efeito do processo de shot peening na taxa de propagação de trinca por fadiga na liga aeronáutica 2024 - T3

Pós-graduação em Engenharia Mecânica - FEG

Peias e espartilhos: sátira popular à moda francesa na Primeira República

In the first decades of the Republic, the streets of the main Brazilian capital cities, especially of Rio de Janeiro and Recife, recently urbanized based on the Haussmanian Paris and smiled upon by the fever of cosmopolitanism that invested Europe, women had been used as runways where they could exhibit her imitated or imported models, especially in Paris. The iconography of the time and the advertisements conveyed by magazines and illustrated periodicals, such as the Almanach de Pernambuco and the magazine Kosmos, for instance, form the testimonies of the massive presence of the French in Rio and Recife, owners of stores and maisons, interested in fulfill the demands of the republican public. In spite of the Strong adherence of the Brazilians to the sociability models to the imported from Europe, the less-favored classes, through the popular literature, showed some resistance to these changes in the habits and clothing, especially in the Northeast, where traces of the Catholic and patriarchal moral and mentality were still alive.

Análise dinâmica em vigas compostas com amortecimento utilizando o método dos elementos espectrais e elementos finitos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Caracterização de juntas soldadas em PAW e GTAW de chapas finas em aço maraging 300 submetidas a vários reparos

Pós-graduação em Engenharia Mecânica - FEG

Análise dos parâmetros antropométricos da cabeça dos militares da força aérea brasileira no projeto de capacetes balísticos

The study of the physical man characteristics and their variations have caught the man's interests since the ancient age. In Brazil, there are no studies which define the anthropometric profile of the Brazilian's head, hindering the development of ergonomic designs. One problem that occurs in the Brazilian armed forces is the use of protective helmets made with measurements of other countries, which causes great discomfort. Thus, this study aims to conduct a study to determine the anthropometric measurements of the head of the Brazilian Air Force military, assisting in the production of helmets more suitable. Therefore, it is presented ananthropometric survey in 576 students of the School of Aeronautics Expert, 286 females and 290 males, aged between 17 and 36 years. The study showed that the differences found between genders are less than 5%. In addition to the fact that the helmet Tues adjustments, there is no need for production of different helmets in relation to gender, but some changes are necessary measures in circumference and shape of the helmet.

Projeto de adaptação do sistema de injeção do túnel transônico para ensaios em bocais de foguete

In this work, the project of a new experimental facility to be installed at the Aerodynamics Division of the Institute of Aeronautics and Space is presented. This new facility will provide means to perform experimental campaigns to analyze the flow behavior at different rocket nozzle concepts using cold gas that will be obtained from a modification of the Pilot Transonic Wind Tunnel air system. The new installation will enable less expensive experiments in a more secure environment, since the cold gas experimental procedures do not demand fuel storage and burn and security procedures are much less severe. Furthermore, experiments can be carried with different types of sensors, commonly used in wind tunnel tests. Also, the optical access is facilitated enabling the use of optical techniques for the characterization of flow properties inside the nozzles, such as pressure and temperature sensitive painting. The full project design and the operation conditions will be showed, as also some technical considerations about the flor behavior in the facility