Advisor(s)
Abstract(s)
Actualmente, as questões ambientais criam uma elevada pressão nas empresas
produtoras de equipamentos e estimulam novos desafios à comunidade científica. Uma forma
explícita de reduzir os impactos ambientais é o recurso a materiais de baixo peso específico.
O aço continua a ser, ainda, o material mais utilizado para fins estruturais por apresentar vantagens competitivas. Neste contexto, algumas siderurgias têm efectuado melhorias extraordinárias nas propriedades mecânicas dos aços vocacionados para aplicações
estruturais. Exemplo típico deste comportamento é a empresa SSAB com a apresentação de aços de alta resistência e, mais recentemente, aços de ultra resistência. Neste contexto, este
trabalho abordou dois casos de estudo onde, no primeiro, com base numa carroçaria
basculante comprovou os benefícios de um aço de elevado limite elástico face a um
tradicional aço macio. O segundo estudo analisou o comportamento à fadiga das juntas
coladas sujeitas a frequência variável, com aderentes em aço de alta resistência, tendo sido estabelecida uma lei de previsão da vida de fadiga.
Currently, an environmental issue creates a high pressure on companies producing equipment and stimulates new challenges to the scientific community. An explicit way to reduce environmental impacts is the use of materials with low specific weight. The steel remains still the most common material used for structural purposes by presenting competitive advantages. In this context, some mills have made excellent improvements in the mechanical properties of steel oriented for structural applications. Typical example of this behavior is the company SSAB with the presentation of high-strength steels and, more recently, ultra high strength steels. In this context, this study addressed two case studies where the first, based on a Tipper, where are really visible the benefits of a high strength steel face to a traditional mild steel. The second study examined the fatigue behavior of bonded joints subjected to variable frequency, with adherents in high strength steel, a law has been established to predict the fatigue life.
Currently, an environmental issue creates a high pressure on companies producing equipment and stimulates new challenges to the scientific community. An explicit way to reduce environmental impacts is the use of materials with low specific weight. The steel remains still the most common material used for structural purposes by presenting competitive advantages. In this context, some mills have made excellent improvements in the mechanical properties of steel oriented for structural applications. Typical example of this behavior is the company SSAB with the presentation of high-strength steels and, more recently, ultra high strength steels. In this context, this study addressed two case studies where the first, based on a Tipper, where are really visible the benefits of a high strength steel face to a traditional mild steel. The second study examined the fatigue behavior of bonded joints subjected to variable frequency, with adherents in high strength steel, a law has been established to predict the fatigue life.
Description
Keywords
Indústria de transportes Aplicações estruturais Aços de alta resistência Sector dos transportes
Pedagogical Context
Citation
Publisher
Universidade da Beira Interior