Plastic Forces
Mostrando 13-24 de 31 artigos, teses e dissertações.
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13. Estudo de painéis de alvenaria estrutural sujeitos a ações perpendiculares ao plano
There are several cases of out-of-plane loaded masonry such as earth retaining walls, water reservoir, wind loaded panels and other. Thus, there is a lack of Brazilian technical literature in this topic. The aim of this thesis is to fulfill this lack and to be as a reference text to design such structures. The litterature review covers recommendations from s
Publicado em: 2007
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14. Aplicação dos Métodos de Elementos de Contorno e Reciprocidade Dual em problemas de Plasticidade 2D Orientada a Objeto
This thesis is a continuation of previous studies in inelasticity in which the analysis of viscoelastic problems is done using the Boundary Element Method (BEM) with the Dual Reciprocity Method (DRM). Here, BEM is applied to the analysis of plane plasticity problems considering perfectly plastic materials and, taking advantage of the modular nature of the co
Publicado em: 2006
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15. Análise Paramétrica de Ligações com Placa de Extremidade em Estruturas de Aço Submetidas a Momento Fletor e Força Axial / Parametrical Analysis of Structural Steel Endplate Joints Subjected to Bending Moment and Axial Force.
Traditionally, the steel portal frame design assumes that beam-to-column joints are rigidor pinned. Rigid joints, where no relative rotations occur between the connected members, transfer not only substantial bending moments, but also shear and axial forces. On the other extreme, pinned joints, are characterised by almost free rotation movement between the c
Publicado em: 2006
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16. The wild dance of the body / A selvagem dança do corpo
This tesis intends to argue on the creation and plastic abilities of the body. In order to follow this arguments, we will make a coutenpoint between two distinct thoughts: the one of natural body and other of na artificial body ? taking as conceptual characters two ballet dancers of the begining of the 20th century Isadora Duncan and Vaslav Nijinsky ?the for
Publicado em: 2006
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17. Analise de paredes de contenção atraves de metodo unidimensional evolutivo : Marcelo Tacitano / Earth-retaining structures analysis with the evolutionary one-dimensional method
The retaining structures, usually of wood, steel or concrete, can be constituted by sheet pile wall, piles with lagging, ?in cast? pile walls and diaphragm walls among others and need to be designed, so that they reach the requirements about functionality, execution, safety and economy an appropriate way. It is possible divide the design methods in three gre
Publicado em: 2006
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18. Time-dependent behavior of sulphatic rocks of the anhydrite and gypsum / Comportamento dependente do tempo de rochas sulfáticas de anidrita e gipso
The purpose of this thesis is to contribute for the knowledge of time-dependent behavior of sulfatic rocks of anhydrite and gypsum. Emphasis is given to provide straightforward arguments about physical mechanisms responsible for creep observed in some underground excavations in those rocks in Europe. Explanation for this phenomena is not clear yet and studie
Publicado em: 2005
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19. Deblocking of interacting particle assemblies: from pinning to jamming
A wide variety of interacting particle assemblies driven by an external force are characterized by a transition between a blocked and a moving phase. The origin of this deblocking transition can be traced back to the presence of either external quenched disorder, or of internal constraints. The first case belongs to the realm of the depinning transition, whi
Brazilian Journal of Physics. Publicado em: 2003-09
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20. UNIFORMLY PROBABLE DESIGN RESPONSE SPECTRUM FOR INELASTIC SECONDARY SYSTEMS / ESPECTRO DE RESPOSTA DE PROJETO UNIFORMEMENTE PROVÁVEL PARA SISTEMAS SECUNDÁRIOS INELÁSTICOS
The authors concern includes two main points in the subject of design response spectra generation for secondary systems in nuclear power plant structures: the consideration of inelastic behavior in the secondary systems materials and the production of uniformly probable design response spectra. One works with a previously developed secondary system model att
Publicado em: 2003
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21. ESTUDOS DA DEFORMABILIDADE DE ESCAVAÇÕES COM SOLO GRAMPEADO / DEFORMABILITY ANALYSIS OF SOIL NAILING EXCAVATIONS
The use of passive inclusion for soil reinforcements, technique usually known as soil nailing, has been gaining growing acceptance within civil engineering professionals, especially in Rio de Janeiro. However this technique lacks a more detailed study on the elevant parameters influencing the deformability of soil nailed masses. The nails are rigid inclusion
Publicado em: 2001
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22. Inverting dynamic force microscopy: From signals to time-resolved interaction forces
Transient forces between nanoscale objects on surfaces govern friction, viscous flow, and plastic deformation, occur during manipulation of matter, or mediate the local wetting behavior of thin films. To resolve transient forces on the (sub) microsecond time and nanometer length scale, dynamic atomic force microscopy (AFM) offers largely unexploited potentia
National Academy of Sciences.
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23. Factors governing adherence of Candida species to plastic surfaces.
The ability of Candida albicans and Candida spp. to adhere to inert polymeric surfaces may allow these organisms direct ingress into the human host. Biophysical characterization of this adherence shows that the forces responsible for such adherence are attractive London-van der Waals forces (or hydrophobic forces) and electrostatic forces. The hydrophobic af
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24. Bacteriophage capsids: Tough nanoshells with complex elastic properties
The shell of bacteriophages protects the viral DNA during host-to-host transfer and serves as a high-pressure container storing energy for DNA injection into a host bacterium. Here, we probe the mechanical properties of nanometer-sized bacteriophage φ29 shells by applying point forces. We show that empty shells withstand nanonewton forces while being indent
National Academy of Sciences.