Seleção de material para ponteiras de bengalas de deficientes visuais com o auxílio da ferramenta multicritério TOPSIS

• Autor(a) principal: LEÃO, Cláudia Canto de Souza
• Data de Publicação: 2018
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional do Instituto Federal de Educação, Ciência e Tecnologia do Pará (IFPA)
• Texto Completo: https://repositorio.ifpa.edu.br/jspui/handle/prefix/229
• topic: Tecnologia assistiva; Reciclagem; Compósito; TOPSIS; Assistive technology; Recycling; Composite; CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA; Materiais não metálicos; Caracterização, processamento e aplicação de materiais

Nowadays new realities and paradigms emerge in the world in a diverse society that questions and plans new ways of social inclusion of the person with disability. Assistive technology addresses the resources and services used to increase, maintain, or improve the functional capabilities of people with disabilities. The search for new inclusive technologies has stimulated and fostered new researches of specialized technological resources, aid equipment, which are being used and produced more frequently in recent years. The objective of this research is to select the best material for disassembled walking sticks for the visually impaired because it is a fragile and low durability element, aiming to assist the locomotion of these users offering them more safety, comfort and satisfaction. Five types of materials were evaluated, the 10% and 15% rubber tires of orthophthalic polyester resin; the epoxy resin incorporated with 10% and 15% rubber of waste tires; and acrylonitrile-styrene (ABS) plastic made by 3D prototyping. The performance measures considered for multicriteria evaluation were resistance (traction and impact), specific mass, moisture absorption, cost, sound propagation, resistance to friction and tip change. The methodological procedure was carried out in three stages: (i) the experimental in the laboratory, which involved the characterization of the materials, to obtain the technical variables, through mechanical and physical tests; (ii) experimental in the field, through a research with the visually impaired of a local association to obtain the qualitative variables; and (iii) the multicriteria evaluation, in which the overall performance indicators of the evaluated alternatives were calculated. The technique of Decision Multicriteria Analysis (AMD), Technique for Order Preference by Smile to Ideal Solution (TOPSIS) was used, which proved to be appropriate for the analysis of the problem because conflicting and divergent attributes were identified, between quantitative and qualitative measures , besides the attribution of weights according to the preference of a professional of the area for the selection of the ideal tip. The results showed that the ABS material tip, manufactured in the 3D printer, performed better than the other composite tips because it was better in the criteria of higher weights and lower in the criteria with less relevant weights, such as the exchange of the tip.