Estudo da densidade óptica e da resistência à flexão de três pontos em corpos-de-prova fundidos com a liga metálica High Bond (Co-Cr), com secções vertical 90°, diagonal 45° e diagonal 22,5°, soldados pelas técnicas convencional e TIG

Pós-graduação em Odontologia - FOA

Protocolo de modelagem tridimensional do primeiro pré-molar superior para o método dos elementos finitos e análise das concentrações de tensões na região cervical do esmalte

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação do nível de inserção óssea do dente suporte em prótese parcial removível mandibular classe I associada a implante osseointegrado: análise pelo método dos elementos finitos

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

Projeto de um dispositivo para prensar bobinas polares de pólos salientes para hidrogeradores

The increasing demand for productivity and quality in companies has converged to a common point: reducing costs. In this context the present work aims at the development of a mechanical press which is designed for pressing polar hydrogenerators coils with salient pole in field facilitating the assembly of the poles in the plant, as well as reforms especially in hydrogenerators, reducing significantly the transport costs. With security in mind as well as reduced costs, a study was made of the materials to be used as it was applied a methodology for calculating the correct choice of safety factor to be used in the device. Through mechanical calculations were dimensioned critical items of the device as the diameter of the rods as well as the minimum thickness of the base of the device must have so that it does not break threaded shear in the region by applying the total load of traction on the risers implementation of the pressing. All compression loading device will be through the application of torque on the nuts of bolts in this way was defined by calculations the required torque for each nut so that you can reach the pressure specified in the design specifies. The modeling of the device was made using the INVENTOR™ program in conjunction with the program ANSYS ™. These programs have created designs in three dimensions, assembly and simulation of stress analysis in components of the device

Distribuição de tensões em bocais de vasos de pressão

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

Projeto mecânico de um modelo para túnel de vento e validação de seus componentes à partir de simulações em software de elementos finitos

The objective of this study was to develop a model that allows testing in the wind tunnel at high angles of attack and validates its most critical components by analyzing the results of simulations in finite element software. During the project this structure suffered major loads identified during the flight conditions and, from these, we calculated the stresses in critical regions defined as the parts of the model that have higher failure probabilities. All aspects associated with Load methods, mesh refining and stress analysis were taken into account in this approach. The selection of the analysis software was based on project needs, seeking greater ease of modeling and simulation. We opted for the software ANSYS® since the entire project is being developed in CAD platforms enabling a friendly integration between software's modeling and analysis

Photoelasticity in Dentistry: a literature review

Introduction and Objective: Photoelasticity consists of an experimental technique of stress analysis. This technique is very used in most different areas including Dentistry. This literature review presents the several applications of photoelastic technique in Dentistry the several applications of photoelastic technique in Dentistry as well as its advantages and disadvantages. Literature review: Based on this method of analysis, it is possible the verification of the stress distribution and deformation in structures with complex geometry as maxilla and mandible. It can be used to evaluate the distribution of stress on several types of prosthesis as removable partial denture systems with different retention systems, conventional implant prosthesis, overdentures and Brånemark protocols. Moreover, photoelasticity can be used to assess the stress generated by various by various orthodontic movements, different orthodontic systems and different materials (orthodontic wires). In addition, it is used to analyze different defects of maxillectomy, splint types on traumatized tooth and post-core restoration methods. This technique can also be used to assess dental instruments such as evaluation of different designs of periodontal probe. Conclusion: The photoelastic analysis has been a technique of great importance in health area studies, more specifically in Dentistry. Based on this method of analysis, it is possible to measure the stress distribution and deformation in structures with complex geometry as maxilla and mandible.

Influência do tratamento superficial 3IP na vida em fadiga dos aços ABNT 4340 e 15-5PH para aplicação aeronáutica

Pós-graduação em Engenharia Mecânica - FEG

Effect of polymerization methods and thermal cycling on color stability of acrylic resin denture teeth

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

Influence of morphological variables in photoelastic models with implants submitted to axial loading

Purpose: This study used 12 photoelastics models with different height and thickness to evaluate if the axial loading of 100N on implants changes the morphology of the photoelastic reflection. Methods: For the photoelastic analysis, the models were placed in a reflection polariscope for observation of the isochromatic fringes patterns. The formation of these fringes resulted from an axial load of 100N applied to the midpoint of the healing abutment attached to the implant with 10.0mm x 3.75mm (Conexão, Sistemas de Próteses, Brazil). The tension in each photoelastic model was monitored, photographed and observed using the software Phothoshop 7.0. For qualitative analysis, the area under the implant apex was measured including the green band of the second order fringe of each model using the software Image Tool. After comparison of the areas, the performance generated by each specimen was defined regarding the axial loading. Results: There were alterations in area with different height and thickness of the photoelastic models. It was observed that the group III (30mm in height) presented the smallest area. Conclusion: There was variation in the size of the areas analyzed for different height and thickness of the models and the morphology of the replica may directly influence the result in researches with photoelastic models.

Influencia del nivel de inserción ósea del diente soporte en el desplazamiento de PPR de extremidad libre mandibular asociada al implante oseointegrado

The rehabilitation with mandibular distal extension removable partial dentures (DERPD) is complex and the use of implants has been improving the functioning of this approach. The insertion bony level around of the last support tooth is an aggravating factor, since it can harm the longevity of the treatment. Thus, the aim of this research was to evaluate the displacement tendency of a mandibular DERPD associated to an implant, with different insertion bony levels and different connections between the RPD and the support tooth, by finite element analysis. Eight models were made: MA - DERPD, incisal rest, no bony loss; MB - DERPD, distal plate, no bony loss; MC - DERPD, incisal rest, no bony loss, with implant and ERA system; MD - DERPD, distal plate, no bony loss, with implant and ERA system; ME - DERPD, incisal rest, bony loss; MF - DERPD, distal plate, bony loss; MG - DERPD, incisal rest, bony loss, with implant and ERA system; MH - DERPD, distal plate, bony loss, with implant and ERA system. Loads of 50 N in each peak were applied. Displacement maps were obtained and showed that implant favors this association and the bony loss harms the prognostic of the prosthesis. It is concluded that: the introduction of the implant with ERA system reduced the displacement tendency of the tooth and supporting structures; introduction of distal plate reduced the movement tendency of the support tooth; the decrease of the periodontal support didn't influence significantly the displacement tendency of the models with distal plate distal, but it influenced the models with distal incisal rest.

Polymorphism analysis of the hsp70 stress gene in Broiler chickens (Gallus gallus) of different breeds

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

Analysis of gene expression profiles under water stress in tolerant and sensitive sugarcane plants

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

Influence of husbandry systems on physiological stress reactions of captive brown brocket (Mazama gouazoubira) and marsh deer (Blastocerus dichotomus)-noninvasive analysis of fecal cortisol metabolites

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Finite-Element Analysis of Stress on Dental Implant Prosthesis

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