Comportamento dinâmico de suspensão eletromecânica: análise da resposta devido ao amortecimento e à rigidez não linear

Pós-graduação em Engenharia Elétrica - FEB

Modelagem e otimização por metodologia de superfícies de resposta: um estudo em arames de aço SAE 9254 para molas automobilísticas

Pós-graduação em Engenharia Mecânica - FEG

Avaliação de fração volumétrica de austenita retida e martensita em aço trip 800 utilizando três métodos diferentes

In the second half of the last century the automobile industries suffered from the petroleum crisis caused mainly by the wars in the Middle East. These crises led the automakers rethink their vehicles. One of the most important events after that was the adoption of new steels by the industry. One example is the TRIP steels (Transformationinduced plasticity). It is known that the macroscopic behavior of a material is strongly dependent on its microstructure and therefore the quantitative metallography is important to understand and relate the material properties to its microstructure. In this work, different specimens of TRIP steels were etched using LePera reagent. The obtained images were analyzed using digital processing. Using the ImageJ software the methods threshold and watershed were studied as well as a comparison with the ASTM E562 standard. The methods were compared and finally the morphological characteristics and volumetric fraction of the retained austenite and martensite phases were analyzed. The results showed that the threshold led to a higher number of identified grains with lower mean area and total area fraction than the watershed method and ASTM standard

Análise do gerenciamento de projetos de produtos na área de desenvolvimento de motores em uma indústria automotiva

L'un des facteurs nécessaires pour qu’une entreprise reste compétitive sur le marché est la création ou l'amélioration d'un produit afin qu’il réponde aux besoins et aux attentes des clients, ainsi, le Processus de Développement de Produits (PDP) est essentiel. Pour la réussite du PDP, il est souhaitable de suivre un système standard de gestion de projet. L'objectif de cette étude est d'analyser la gestion de projets dans le processus de développement de produits dans l'industrie automobile afin d'identifier les possibilités d’amélioration. Par conséquent, nous avons procédé à une revue de littérature sur le sujet, analysé les lignes directrices et les pratiques du processus de développement de produit dans l’entreprise. Comme résultat, il a été obtenu que le système de développement de produits créé par l’entreprise requiert la clarification des outils utiles à la gestion de projet. Un problème de communication et de gestion des coûts a également été constaté dans le domaine du développement du moteur lourd

Modelo de flexibilidade de manufatura em processos de submontagem

Through observation of production process of a Vale do Paraiba’s automobile industry, one can encounter in need of improvement related to large uncertainties and variations in the production environment, a fact that inspired the search for solutions that can respond quickly to these changes. This way, the paper describes the development of a flexible manufacturing model, which aims to optimize the process in an automotive sub-assembly industry of the Paraíba Valley. The main objective is to propose a method to promote viable alternatives to easing the assembly of parallel sub performed the assembly of cars. For the construction of the model was necessary to explore concepts of flexible manufacturing and making the data presented in literature, which were vital to ensure the development of the method. The concepts discussed are usually presented at an undergraduate degree in Engineering. Data compiled by the model are able to serve as a strategic benchmark for decision making by managers. Featuring alternative response variables and uncertainties of the organizational environment, a fact that facilitates the management of human resources and productive

O processo de ensino aprendizagem da educação no trânsito por meio da construção de um personagem heróico

This research project aims to study the relationship between the myths and the automobile, the contributions to the literature of fairy tales and the possible contributions of the heroes of fairy tales can bring to the process of teaching and learning defensive behavior in traffic. Traffic is a phenomenon so common to modern societies that often do not pay attention to their relevance as synonymous with social space and contains diversity of people and behaviors. To counter the image of fatalistic accidents and transgressions, will support us in the virtues of the hero figure to culminate in a collective tale in which children want to rethink their behavior, becoming citizens, with a more preventative and better quality of life. The research will be held in four rooms of elementary school in a city public school that serves children from families of the urban popular classes. The research will seek to analyze how the design of transit for the children and what the increase attributed to the theme, after the establishment of a collective story

Análise da troca de calor em sistemas de injeção de termoplásticos – um estudo de caso: polipropileno

The purpose of this work was to define the processes through which the cooling of thermoplastics parts occur inside the mold cavity in an injection process. The plastic materials have become more widespread in the automobile industry and, among its manufacturing processes, injection moulding develops quickly, allowing the manufacturing of quality parts in great volumes. Data was collected from the injection of Volkswagen Gol NF 23X (Gol Generation 5). Using approximated methods for calculation for the heat Exchange inside the mould, in the cooling system, the required water flow was determined to properly cool the parts. Comparing the obtained value with Project specifications, it was verified that the method, in spite of incurring in some mistakes, is efficient in determining the flow of cooling fluid and serves as a verification tool for the parameters defined on project, and can be applied to simple projects. The definition of the cooling system, in practice, is dependent on innumerable variables and each case must be approached in itself, since the parameters for one product may not be ideal for another

Alternativas sustentáveis para a circulação urbana – estudo de caso: as cidades de Guaratinguetá e Lorena

La circulation urbaine dans les villes brésiliennes a été marquée par l'influence directe de l'automobile. Grâce aux possibilités découlant de l'automobile, les villes se développent de plus en plus désordonnées et exigent la création de nouveaux moyens pour maintenir le flux du trafic. Cependant, la création de nouvelles routes est venu de collaborer avec les embouteillages, parce que plus les routes ont été construites, plus elles ont généré le besoin de transport. La question du développement durable a commencé à être traités de 1987 et alors, les premières idées pour résoudre, entre autres, le problème de la circulation urbaine. Une des solutions suggérées par les études est l'utilisation de transports non-motorisés. Ainsi, le vélo est devenu le grand pari pour un transport plus durable. Au Brésil, le vélo est largement utilisé, mais n'est pas considéré comme un réel moyen de transport, qui conduit à de mauvais investissements et incitations. Par conséquent, des mesures sont nécessaires pour encourager le transport à vélo pour se obtenir, avec d'autres mesures, un transport plus durable. Enfin, l'étude de cas dans deux villes, Guaratinguetá et Lorena, montre l'influence de l'automobile dans la formation de ces deux villes, qui a fini par nuire les autres modes de transport qui auraient pu être mieux utilisés

Marketing experimental: análise de conteúdo na indústria automobilística

The screen work seeks to illustrate the experiential marketing strategies, relating these concepts within the automotive industry. From the methodology of content analysis, success stories of the automotive industry have been analyzed in the light of experimental marketing theories to elucidate the strategies of organizations with their target audience. The objectives aimed at understanding and studying experiential marketing within the market scenario, identify its main characteristics and applicability. The main results stand out that sensory experiences provided by experiential marketing can be the differentiating factors between organizations, especially, those of the automotive sector

Estimativa das emissões de monóxido de carbono por veículos automotivos na cidade de Campinas/SP utilizando o modelo CAL3QHCR

Air pollution is an environmental issue worldwide and frequently cause negative effects on population health and ecosystems on cities. The relationship between climate and atmospheric pollution can be used as a surrogate to the intensity of air pollution. The present and quantity of some gases can be used as indicators to air quality: particulate matter (PM), sulfur dioxide (SO2), carbon monoxide (CO), ozone (O3), and nitrogen dioxide (NO2). Among those gases, CO has its major source within the cities, where automobiles are the main emitter. But measure pollutant concentration are challenging, sometimes because the lack of good equipments due to high costs and of the large variability of models that varies in precision, way of measure and distribution of sellers. Modeling are useful when there are an intend to evaluate air pollution, its sources and evaluate scenarios. This work aims to use CAL3QHCR model developed by the U.S Environmental Protection Agency (EPA) to generate predictive surfaces of CO concentration distribution on a site within Campinas city, located in São Paulo state, Brazil. CAL3QHCR model use data urban automobile circulation to generate spatial results for CO distribution. We observed that the pollution concentration was lower on our modeling than the concentrations measured by Companhia Ambiental do Estado de São Paulo (CETESB), the main environmental company on the São Paulo state. Also the correlation between average estimates of our model and the measure by CETESB was weak, indicating that the model used on this study need to be or better parameterized, or the scale we measured of CO emissions need to be rescaled. Although the model failed to correlate to CETESB data, maybe one that explore the estimated emissions distributed within the sites to understand spatial distributions of CO on the regions. Also, the generated information can also be used to other studies, and come to be useful to explain heat island

Aplicação de adesivos estruturais em painéis de carros

The automobile industry is increasingly interested in reducing vehicle weight for greater speed, lower fuel consumption and emissions, through innovation of materials and processes. One way to do this is to seek the replacement of conventional processes by the use of structural adhesives. Structural adhesives are highly resistant materials, which can replace rivets, bolts and welds allowing the substrate / adhesive assemble is stronger than the substrate itself. One of the major advantages of gluing with respect to welding is its esthetic appearance, since it does not leave marks. For this reason, parts to be soldered require a minimum thickness so that the marks do not appear, since the pieces from gluing have no restriction as to the thickness. By replacing the vibration welding process for gluing process of the instrument panel parts of an automobile, one obtains a reduction of the thickness of the parts and therefore it decreases the weight of the car. This work aims to study the various structural adhesives that already exist on the market to be applied on the instrument panel. The mechanical test performed to measure the maximum adhesive strength was the Lap Shear Test at 23°C (room temperature), -35°C and 85°C. The types of adhesives used were the hot-melt and the bi-component. By the results obtained, it is in favor using the bi-component for application to the union of instrument panel parts

Sistema de gerenciamento de energia para controle de carga/descarga entre baterias de lítio e ultracapacitores, envolvendo sistema de tração elétrica com frenagem regenerativa

Pós-graduação em Engenharia Elétrica - FEIS

Modelo de avaliação de impacto ambiental utilizando a teoria dos conjuntos fuzzy: um estudo de caso para a indústria automobilística

Pós-graduação em Ciências Ambientais - Sorocaba

Aços avançados de alta resistência: avaliação da microestrutura e propriedades dos aços DP 600 E DP 780

This work aims to study the Dual-Phase 600 and 780 steels, which are part of technology development project materials for the automotive industry. It is worth underscoring the antagonistic properties as the Dual-Phase steel assemble, high mechanical strength and elongation due its microstructure, ferrite and martensite. These properties are obtained by a intercritical heat treatment which facilitates the formation of a hardness metastable microstructure shaped plates of low carbon steels. The applicability of Dual Phase steel in the structure of vehicles is huge and its production is already on a commercial scale, so the study and development of this material implies lower cost in automobile manufacturing processes. The dual phase steels DP600 and DP780 underwent tensile, hardness and metallographic analysis to evaluate and comparing its properties. The results indicate that the DP780 steel has higher strength and hardness than the DP600 steel and its microstructure consists of martensite higher fraction which accounts for the higher resistance and hardness. However, the DP600 has higher conformability to DP780 steel

Centralidade, eixos comerciais e consumo: um estudo das concessionárias de automóveis em Presidente Prudente (SP)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)