Programa de Pós-Graduação em Engenharia Industrial - PPGEI/ITEC
URI Permanente desta comunidadehttps://repositorio.ufpa.br/handle/2011/10050
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Navegando Programa de Pós-Graduação em Engenharia Industrial - PPGEI/ITEC por Orientadores "DIAS, Carmen Gilda Barroso Tavares"
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Item Acesso aberto (Open Access) Análise de um vaso de pressão pós-incidente(Universidade Federal do Pará, 2021-12-13) RODRIGUES, Igor Florentino; DIAS, Carmen Gilda Barroso Tavares; http://lattes.cnpq.br/2113791118142177Composite materials have numerous applications in the most varied areas of engineering as offshore, oil and gas industry, marine industries, aeronautics, and automaker. Used because they bring high rigidity and specific resistance, due to the advantages of being resistant to corrosion and having structural flexibility. The work is focused on fiberglass composites with epoxy matrix (FG) and no high-density polyethylene (HDPE) a decade after the incident. The approach was based in two stage, first on an investigation that took place on board of a semisubmersible drilling rig that operates offshore with a drilling capacity of 7500 meters in depth and a water depth of 2500 meters. a high pressure line that is connected to CAPV (composite air pressure vessel) that is part of to the high pressure system of the CMC (Crown mounted compensator). In a second stage, was took samples from CAPV to be analyzed, where impact tests (Charpy) were performed according to ASTM D6110-10 standard, flexion tests according to ASTM D790-17 standard, differential scanning calorimetry (DSC) according to ASTM D3418-12 standard, scanning electron microscopy (SEM) and thermogravimetric to have a more detailed study on the composite materials that made up those vessels, which are PEHD and FG with matrix epoxy. Showed the results of the investigation and finish the work with material analyses assays even after 10 years of manufacture and complications during the use of the vessels.Item Acesso aberto (Open Access) Produção de chapa plástica a partir do endocarpo de murumuru (astrocaryum murumuru mart.) e poliolefinas recicladas.(Universidade Federal do Pará, 2021-09-23) LIMA, William Arthur dos Santos de; DIAS, Carmen Gilda Barroso Tavares; http://lattes.cnpq.br/2113791118142177In the Amazon, a huge amount of non-wood lignocellulosic waste is obtained from the production of oils and butters from pressing of seeds and almonds. The economic and productive viability of plastic sheet has the proposal to close the production cycle of murumuru assets (Astrocaryum murumuru Mart), the two largest companies producing murumuru butter in the metropolitan region of Belem generated 410ton of tegument in the biennium (2019/2020), from the extraction of butter for the cosmetic industry. It also seeks to contribute more options for recycling high-density polyethylene (PEAD) and polypropylene (PP) packaging, used in the storage of oils. The objective of this work was achieved through the production process of plastic plates with properties compatible with the plates currently marketed, positive implications for the environment.Item Acesso aberto (Open Access) Projeto, montagem e testes de fonte Cockcroft - Walton para Electrospinning(Universidade Federal do Pará, 2022-06-06) ARAÚJO FILHO, Paulo Sérgio Alves de; VIEIRA JÚNIOR, Petrônio; http://lattes.cnpq.br/1958791286192330; DIAS, Carmen Gilda Barroso Tavares; http://lattes.cnpq.br/2113791118142177Electrospinning is a way of spinning using an electric field, the wire formed has a nanometric diameter and is used in biomaterials, pharmaceuticals, electronics, in the area of semiconductors and energy generation. During electrospinning, the solution leaves a starter vessel and reaches a screen through the force of the electric field. The method fits according to the purpose of the experiment. For each objective there are a variety of polymers, solvents, the latter defining the operating ranges for: field strength, voltage and operating distance. A source was designed and assembled using the Cockcroft multiplier. For the design of the circuit, design and simulations were carried out. For validation, electrospinning was performed using the source.Item Acesso aberto (Open Access) Protótipo de um secador de grãos rotativo compacto com sistema fotovoltaico(Universidade Federal do Pará, 2023-08-06) RODRIGUES, Benedito de Jesus da Silva; DIAS, Carmen Gilda Barroso Tavares; http://lattes.cnpq.br/2113791118142177 País de Nacionalidade BrasilThe industrial bioeconomy of açaí, a fruit native to the Amazon, produces food with antioxidant phenolic compounds and lipids. Fractions of the pulping by-product are used to generate bioenergy and are being researched as biopolymers, filler for making furniture and architectural materials. With this in mind, two rotary grain dryers were designed: the first is a commercial model (capable of drying 14 kg of açaí kernels) and the second is a compact model (capable of drying 1.0 kg of material). Due to the practicality of its use in the laboratory, the compact model was selected for manufacture. This prototype consists of: a micro motor (with adjustable torque and frequency, 40W of electrical power and bivolt 127/220VAC), which drives a rotating drum (measuring 24cm in diameter by 24cm in length) at a rotation speed of 57.6rpm, an air heating system (consisting of: air confinement chamber, thermal heating module and temperature controller). The equipment is autonomous for forestry use, with a photovoltaic electricity generation system (configuration: a 60Ah battery, a 540WP monocrystalline photovoltaic module, a 40A PWM charge regulator and a 1000W DC/AC inverter). In the laboratory experiments, 1 kg of açaí kernels were dried (for a period of two hours and forty-three minutes), after which the following fractions were obtained: 5% fiber, 1% insoluble particulate matter from the mesocarp and 63% endocarp. The compact rotary grain dryer is a versatile technology that could be used in biomaterials research in the future, contributing to the region's sustainability and macro-economy.