https://repositorio.ufu.br/handle/123456789/5146 2026-06-01T04:35:42Z https://repositorio.ufu.br/handle/123456789/48704 Title: Avaliação de pré-formas multimateriais em aço carbono e aço inoxidável austenítico depositadas via manufatura aditiva por deposição a arco Abstract: In this work, the metallurgical evaluation and adhesion at the interface between carbon steel and stainless steel in clad and multimaterial pre-forms (walls) produced by wire-arc additive manufacturing (WAAM) are carried out. Two walls were produced using AWS A5.18 ER70S-6 wires as the base material and AWS A5.9 ER309LSi as the coating material, through coordinated deposition with two welding robots operating in parallel. The walls differed exclusively in terms of the distance between the deposition torches, adopting spacing of 50 mm and 100 mm, keeping all other process parameters constant. The evaluation of the adhesion and integrity of the clad interface was carried out by guided bending tests according to ASTM A264:2019, using bending up to 180°, with the coating maintained in compression. The metallurgical characterization was conducted by optical microscopy, scanning electron microscopy and Vickers microhardness tests, allowing the analysis of the base material, the interface and the coating. The microhardness maps were obtained according to ASTM E384:2011, allowing the evaluation of hardness gradients along the clad interface. The results allowed to correlate the microstructural characteristics and microhardness profiles with the behavior observed in the bending tests, evidencing the influence of the distance between the deposition torches on the formation of the interface and on the integrity of the metallurgical bond between the stainless-steel coating and the carbon steel base material produced by additive manufacturing by arc deposition. 2026-02-27T00:00:00Z https://repositorio.ufu.br/handle/123456789/48661 Title: Desenvolvimento de uma metodologia de instrumentação e avaliação da integridade de estruturas de concreto armado em operação contínua via técnica da impedância eletromecânica e o auto codificador variacional. Abstract: The monitoring of civil structures that are in full operation has been gaining more and more space in Brazil and worldwide, due to large structures such as bridges, viaducts, and dams that are reaching the end of their useful lives and need periodic and increasingly frequent maintenance. The advancement in the studies of Structural Integrity Monitoring (SHM) and Artificial Intelligence (AI) has opened a wide range of applications in monitoring structures and making possible increasingly accurate and robust diagnoses, especially in the construction sector. In this context, this paper presents a methodology for instrumentation and evaluation of a reinforced concrete structure that is in continuous operation, using the techniques of ISHM (Structural Integrity Monitoring based on Electromechanical Impedance Technique), ultrasound and AI. For this, the proposed methodology was applied in detail to a reinforced concrete beam that supports a mezzanine at the Laboratório de Mecânica de Estruturas Prof. José Eduardo Tannús Reis (LMEst-UFU). The results showed how important the methodology was to identify and separate situations in which alarms from structure monitoring systems could present FalseNegatives and make correct decisions about the possible measurement limits for a given structure. Thus, the objective was satisfactorily achieved and several suggestions for future work were presented. 2022-07-28T00:00:00Z https://repositorio.ufu.br/handle/123456789/48633 Title: Modelling and analysis of fluid flow problems coupled with radiative heat transfer Abstract: Combustion plays a fundamental role in society, being one of the primary means of energy conversion and storage, with countless applications. As such, it is a key topic in engineering and industrial processes. In many cases, combustion and thermal radiation occur simultaneously: the high temperatures resulting from exothermic reactions, as well as the radiative interaction of the gases generated from these reactions, create an environment where complex radiative heat transfer takes place. Therefore, coupling CFD with radiative heat transfer models is essential for the accurate simulation of industrial reactive flows. Furthermore, literature shows that thermal radiation can significantly affect heat transfer in other situations, such as in thermal cavities at ambient temperature, a problem that is frequently studied without considering radiation effects. This work presents the development and benchmarking of a coupling between a CFD software (MFSim) and a radiative heat transfer solver for participating media (RTS), both internally developed by MFLab in the Federal University of Uberlândia. MFSim is a robust simulation package, capable of modelling turbulence, heat transfer, fluid–structure interactions, reacting flows, and Lagrangian particle transport. RTS is capable of modelling radiative transfer in gray and non-gray participating media containing gases like CO2 and H2O, as well as isotropic and anisotropic scattering phenomena. By integrating these codes, the extensive set of physical models available in MFSim, designed to simulate complex engineering problems, now includes radiative heat transfer, enabling more realistic and accurate modelling of combustion processes. The coupling employs distinct meshes for CFD and radiation, connected via interpolation, allowing for more computational efficiency, as radiative models do not usually require the same spatial resolution as CFD. Tests have shown that the interpolation layer between both algorithms has relatively low computational cost. Benchmarks performed on canonical cases show good agreement with the literature, verifying the approach and reinforcing the importance of radiation in heat transfer simulations. 2025-08-21T00:00:00Z https://repositorio.ufu.br/handle/123456789/48629 Title: Memorial para Promoção à Classe de Professor Titular Abstract: This report describes the professional career of Professor Odenir de Almeida. The document was written based on CONDIR Resolution 2017-03 of the Federal University of Uberlândia (UFU) and begins with the professor's commencement of his Mechanical Engineering studies at the Faculty of Engineering of Ilha Solteira – FEIS/UNESP in 1994. It then moves on to his master's and doctoral qualifications. Following this, a summary of his experience in Aeronautical Engineering is presented, describing his activities at the Brazilian Aeronautics Company – EMBRAER S.A., which served as a reference for his academic work. As a professor at the Federal University of Uberlândia in 2010, the most relevant activities he has carried out over the past 16 years are reported, described in four main groups: teaching, research, extension, and administration and/or management. Finally, a summary of the professor's bibliographic, technical, and academic production is presented. It is expected that, by reading this document, it will be possible to verify the relevance of the aforementioned professor's professional trajectory throughout the sixteen years he was involved in higher education (undergraduate, master's, doctorate, and teaching). 2026-03-23T00:00:00Z