995 resultados para Tensões e deformações


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Pós-graduação em Odontologia - FOA

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Ciências Cartográficas - FCT

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A presente invenção refere-se a composições vanstoras à base de óxidos metálicos, mais particularmente à base de diáxido de estanho (SnO~ 2~) com a adição de óxidos metálicos dopantes, preferencialmente óxido de cobalto (CoO), pentóxido de nióbio (Nb~ 2~O~ 5~) e triáxido de cromo (Cr~ 2~O~ 3~), para conformação de e blocos cerâmicos varistores cujas propriedades eletrónicas não-óhmicas finais são independentes das dimensões dos corpos cerâmicos. A independência das propriedades não-óhmicas em relação às dimensões do corpo permite que uma mesma composição varistora seja utilizada em aplicações para baixas, médias e altas tensões.

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Pós-graduação em Engenharia Mecânica - FEIS

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Based on a fieldwork conducted among groups of Father Cicero‟s devotee pilgrims at the Brazilian state of Ceará, I try to discuss in this paper the use pilgrims make of the expressions "tourism" and "go touring”. The argument presented here is that the uses of these expressions are much more than a classification system through which they seek to define who goes on pilgrimage for devotion or for leisure. The main argument is that when the pilgrims use these expressions there is a tension related to the transformations that have been occurring on pilgrimages (and on the ways pilgrims experience them), as well as on the meanings of pilgrimages for their lives, either individually or as a group.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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This paper studies the frame deformations on a formula SAE vehicle in steady-state cornering and its influence on the lateral load transfers and, consequently, on the tires normal loads due to the applied lateral load. For a vehicle with a perfect rigid frame, the vehicle mass, the position of the center of gravity and the suspensions are the only factors responsible for the load distribution between the tires. When the frame deformations are no longer negligible, the frame deformations affect the loaddistribution between the tires. The frame flexibility turns it able to behave as an additional set of springs to the suspension system, thus changing the behavior of the set. This paper describes howit happens and suggests ways to minimize this phenomenon

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Any failure process that may occur in a part probably is located where the stress exceeded the level of resistance. When a part or component has a sharp change in geometry, such as slots, holes, grooves, bumps or other irregularities, there is an increased concentration of stress at a specific location of the part. The objective of this study is to determine the maximum stresses in structural parts and components using the equations of elasticity theory in conjunction with the stress concentration factor experiment and compare them with results obtained by finite element method

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This work is to analyze the behavior of context concentrated stresses generated around a nozzle connected to a pressure vessel. For this analysis we used the finite element method via a computer interface, the software ANSYS WORKBENCH. It was first necessary to study and intensive training of the software used, and also a study of the ASME Code, Section VIII, which is responsible for the standards used in pressure vessels. We analyzed three cases, which differ primarily in the variation of the diameter of the nozzle in order to analyze the variation of the stresses according to the variation of the diameters. The nozzle diameters were 35, 75 and 105 mm. After the model designed vessel, a pressure was applied on the innervessel of 0.5 MPa. For the smallest diameter, was found the lowest tensions concentrated. Varying between 1 and 223 MPa. Increasing the diameter of the nozzle resulted in increased tensions concentrated around the junction nozzle /vessel. The maximum stresses increased by 78% when the value was increased in diameter from 35 to 75 mm. Since the increase in diameter from 75 to 105 mm, the values of the tensions increased around 43%. These figures emphasize that stress concentrations increased with increasing the diameter of the nozzles, but not linearly