Hot Spot Stress
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. A fatigue life prediction model of welded joints under combined cyclic loading. / Um modelo para previsão de vida à fadiga de juntas soldadas submetidas a carregamentos combinados.
The main purpose of this work is to develop a practical and robust methodology to evaluate the fatigue life in seam weld joints fabricated with GMAW process when subjected to combine cyclic loading. The maximum linear stress at the typical crack initiation region, better known as hot spot stress, was used to calculate the fatigue life through high cycle fati
Publicado em: 2010
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2. Avaliação da vida em fadiga de uma bancada de testes utilizada para realizar ensaios em dutos flexíveis na CADETEC/UFRGS / Fatigue assesment of a riser test machine at the CADETEC/UFRGS
Neste trabalho se realizará a avaliação da vida em fadiga da bancada de ensaios que está sendo projetada e será utilizada nos ensaios de dutos flexíveis na CADETC. Esta estrutura modular tem seção octogonal, sendo que os módulos são parafusados entre si constituídos por tubos cilíndricos soldados uns aos outros. Diversos modelos numéricos serão
Publicado em: 2010
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3. FADIGA EM ESTRUTURAS METÁLICAS TUBULARES SOLDADAS
Circular and rectangular hollow sections are used extensively in the field of the construction and mechanical engineering in all types of structures, such as offshore platforms, towers of communication, fluid conductors, bridges, footbridges and others, under different types of loading. These structures when submitted to cyclical loads, although in situation
Publicado em: 2008
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4. Determinação do limite de fadiga em chapas de aço de baixo carbono para vasos de pressão com e sem solda de filete
This dissertation presents the survey of fatigue strength limit for samples with and without welding, that were constructed of low carbon steel for pressure vessels. The e samples were calculated through the Finite Element Method, where the g in each model, that represents a sample, it corresponds to the displacement fatigue test machine and measured through
Publicado em: 2006
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5. Estimativa do limite de fadiga sob condições de fretting considerando o método da distância crítica do ponto em uma abordagem por elementos finitos
The goal of this work is to evaluate the fatigue limit of components under fretting conditions through a methodology usually applicated to notched componentes. The proposed methodology is based on the application of multiaxial models proposed by Dang Van and Susmel and Lazzarin (Method of Wohler Curve Modified) in terms of the Theory of Critical Distance by
Publicado em: 2006
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6. Disease severity correlates with position of keratin point mutations in patients with epidermolysis bullosa simplex.
Keratins are the major structural proteins of the epidermis. Recently, it was discovered that point mutations in the epidermal keratins can lead to the blistering skin diseases epidermolysis bullosa simplex (EBS) and epidermolytic hyperkeratosis (EH), involving epidermal cell fragility and rupture upon mechanical stress. In this study, we demonstrate a corre