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Previous issue date: 2017-07-24 / A tribologia aplicada em materiais t?xteis apresenta uma significativa conex?o com o conforto da roupa, j? que as propriedades f?sicas dos tecidos est?o intimamente relacionadas ? sua superf?cie e propriedades de desgaste. De igual modo, o atrito na interface cadeira de rodas-t?xteis ? um fator cr?tico, para avarias das roupas e les?es de pele, causadas por cargas mec?nicas c?clicas, pelas press?es de contato e por for?as de cisalhamento, mediante cont?nuo e longo per?odo de tempo. Como os contatos mec?nicos podem ser especialmente problem?ticos, para usu?rios de cadeira de rodas, ? relevante conhecer as caracter?sticas de fric??o dos t?xteis, direcionada para pessoas com mobilidade reduzida. Diante do exposto, o presente trabalho tem por objetivo, analisar o material do assento e encosto de cadeiras de rodas dobr?veis, no que tange a tribologia. E propor novas rotas tecnol?gicas para a fabrica??o personalizada destes materiais. Para isso, foi realizada uma pesquisa de natureza aplicada, com abordagens qualitativa e quantitativa, utilizando dos procedimentos t?cnicos bibliogr?ficos e experimental, para descrever e explicar os ensaios mec?nicos, de resist?ncia ? tra??o e rasgo, forma??o de pilling, solidez ? cor por fric??o, al?m dos ensaios no abras?metro martindale e no trib?metro, pino sobre disco. Os materiais t?xteis analisados s?o de car?ter representativo, baseado nas caracter?sticas e propriedades da sua composi??o. As vari?veis analisadas s?o desgaste, coeficiente de atrito, for?a de atrito e temperatura. A an?lise e interpreta??o dos dados, ? auxiliada pela ferramenta de minera??o de dados Waikato Environment for Knowledge Analysis ? WEKA, utilizando o algoritmo de classifica??o J48. Resultou-se com o estudo, o mapeamento das avarias, elencando em ordem decrescente os materiais t?xteis mais adequados em contato com o assento de encosto de cadeira de rodas. Os resultados apresentaram: o tecido plano sarja, com maior resist?ncia em todos os ensaios; o tecido de malha jersey, com maior temperatura e forma??o de pilling; o tecido jeans, com maior desgaste abrasivo; o tecido tricoline, com maior coeficiente de atrito din?mico; o tecido tecnosport, com menor desgaste abrasivo. Sendo poss?vel tra?ar por meio do trabalho, novas rotas para fabrica??o de materiais t?xteis, voltadas para cadeirantes. / The tribology applied in textile materials presents a significant connection with the comfort of the clothes, since the physical properties of the fabrics are closely related to its surface and wear properties. Similarly, the friction in the wheelchair-textile interface is a critical factor, for clothing breakdowns and skin lesions, caused by cyclic mechanical loads, contact pressures and shear forces, for a continuous and long period of time. As mechanical contacts can be especially problematic for wheelchair users, it is relevant to know the friction characteristics of textiles, aimed at people with reduced mobility. In view of the above, the present work aims to analyze the material of the seat and backrest of folding wheelchairs, regarding tribology. And propose new technological routes for the personalized manufacture of these materials. For this, a research of an applied nature was carried out, with qualitative and quantitative approaches, using the technical bibliographical and experimental procedures, to describe and explain the mechanical tests, tensile and tear resistance, pilling formation, friction fastness, besides the tests on the martindale abrasometer and the tribometer, pin on disk. The textile materials analyzed are of representative character, based on the characteristics and properties of their composition. The analyzed variables are wear, coefficient of friction, friction force and temperature. Data analysis and interpretation is aided by the Waikato Environment for Knowledge Analysis (WEKA) data mining tool using the J48 classification algorithm. The study resulted in the mapping of faults, listing in decreasing order the most appropriate textile materials in contact with the seat of the back of a wheelchair. The results showed: the flat twill fabric, with higher resistance in all the tests; Knitted jersey fabric, with higher temperature and pilling formation; Jeans fabric with higher abrasive wear; The tricoline fabric, with higher coefficient of dynamic friction; The tecnosport fabric, with less abrasive wear. Being possible to draw through the work, new routes for the manufacture of textile materials, aimed at wheelchair users.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/23784 |
| Date | 24 July 2017 |
| Creators | Lim?o, Ilmara Pinheiro |
| Contributors | 21896458831, http://lattes.cnpq.br/5336356193599447, Aquino, Marcos Silva de, 47426632415, http://lattes.cnpq.br/8780485157382325, Melo, Mois?s Vieira de, 10774556404, http://lattes.cnpq.br/1337846419129004, Lima Filho, Neil de Oliveira, 32265387487, http://lattes.cnpq.br/3644358236543495, Andrade, S?nia Maria Bel?sio de, 93807830430, http://lattes.cnpq.br/4486423149027440, Matamoros, Efrain Pantaleon |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA MEC?NICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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