Estudo experimental e numérico de ligações aparafusadas em aço inoxidável submetidas à tração

• Autor(a) principal: Batista, Gilmar de Castro
• Data de Publicação: 2018
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/11658
• topic: Civil engineering; Structural analysis (engineering); Stainless steel; Plates in tension; Bolted connection; Experimental tests; Numérical analyses; Engenharia civil; Análise estrutural (Engenharia); Aço inoxidável; Peças tracionadas; Ligações aparafusadas; Análise experimental; Análises numéricas; CNPQ::ENGENHARIAS::ENGENHARIA CIVIL

Currently, the design of structures performed using stainless steel considers analogies based on carbon steel grade, but this material presents four very distinct stress versus strain curves, thus modifying the overall structural behavior. In addition, the connections play a part fundamental in the overall behavior of structures. Therefore, the present work aims to evaluate the structural performance of bolted connections with distinct failure modes. These joints were performed in both austenitic and ferritic stainless steel thin-plates under tensile loading by means of experimental tests and numerical simulations. The numerical model was developed using the program Abaqus CAE, based on the experimental tests developed in this work. Subsequently, a parametric study was carried out with variations of the plate geometry. In addition, the results obtained were compared to current standard and proposed studies in the literature. Among the results, a good agreement can be observed between the numerical and experimental results. In general terms, ferritic stainless steel experimented both load and failure mode closer to the standards compared to austenitic steel. In addition, it is important to mention that the curling effect is more evident for the cases studied in austenitic steel being related to the deformation capacity of the materials analyzed. The parametric study showed that the bolted connections in which the collapse mode is related to the crushing or tearing of the plate presents a constant loading plateau when the curling effect is observed. In the connections where the failure is characterized by the rupture of the effective section, the parameter kr used in the standard showed to be very strict for the definition of the joint capacity.