Análise do torque de aperto de uma união aparafusada com diferentes porcas, parafusos e arruelas

• Autor(a) principal: Hirota, Sergio Massao [UNESP]
• Data de Publicação: 2016
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/155429; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2017-05-02/000883089.pdf
• topic: Resistência de materiais; Lubrificação Lubrificação; Torque; Parafusos e porcas; Lubrication

The material's assembling by screws is common used around the world. There are equations to determine the theorical yield strength torque of a bolt. In this study, the torque is compared to real yield torque acquired experimentally of bolts using different nuts, bolts, whether use washers, with or without lubrication in a bolted joint. It was used hex bolt, head flange bolt, head flange nut, hex nut, nylon locknut, stainless steel 304 and carbon steel washer and aerosol lubricant. By yield strength torque theoretical calculations, the results should be between 13,8 N.m. and 24,4 N.m.. The experiments results were between 14,2 N.m. e 21,4 N.m.. It was concluded the yield load torque bolt increased using lubrificant. When is used washers, the load on the bolted joint is affected by the washer made material. And bolted joint has a lower yield point using nylon locknut used comparing to hex nut