Theoretical Mechanics
Mostrando 1-12 de 70 artigos, teses e dissertações.
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1. Radiação térmica e a fórmula de Planck
In this paper, theoretical and experimental research on blackbody thermal radiation is discussed and historically ordered. The main thermal radiation equations following Planck’s revolutionary idea are obtained using the formalism of statistical mechanics. These equations, already well known, are deduced in a very detailed and didactic way in order to faci
Química Nova. Publicado em: 2022
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2. IMPLEMENTAÇÃO DO CAMPO DE FORÇA CLAYFF NO GROMACS: UMA APLICAÇÃO EM ESTRUTURA DE CAULINITA
Molecular dynamics techniques are increasingly being used for material science studies, being a theoretical approach based on molecular mechanics studies. GROMACS is a free software that allows the development of simulations of various types of molecules, from biological molecules to inorganic structures associated with the area of materials, requiring the s
Quím. Nova. Publicado em: 2020-06
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3. PSICANÁLISE E BINARIDADE DE GÊNERO: UM DEBATE À LUZ DA SEXUAÇÃO LACANIANA
RESUMO: Este artigo examina a crítica endereçada à psicanálise lacaniana de que seus desenvolvimentos teóricos a respeito da diferença sexual teriam se dado sob a regência da dinâmica que regula a binaridade de gênero. Pretendemos mostrar que a teoria da sexuação, através do recurso dos números e das subversões lógicas propostas, visa formaliz
Ágora (Rio J.). Publicado em: 23/09/2019
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4. von Neumann e a descrição da Mecânica Quântica no espaço de fases
Resumo Ao fundamentar as bases da Mecânica Quântica através da solução de um problema matemático associado a possíveis inconsistĉncias na relação de comutação para os operadores posição e momento linear, von Neumann lança as bases teóricas do que posteriormente resultou na descrição da Mecânica Quântica no espaço de fases. No presente tr
Rev. Bras. Ensino Fís.. Publicado em: 18/02/2019
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5. A New Buffer in Impact Reduction for Aerospace Applications
Abstract The aim of this paper is to introduce a new buffering mechanism in impact reduction during assembly process of two space vehicles. Probe-cone mechanism, due to its computational easiness, is employed to study impact interaction between multibody systems. The proposed buffer with a compact structure includes a probe equipped with axial and torsional
Lat. Am. j. solids struct.. Publicado em: 14/06/2018
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6. Low Subsonic Wind Tunnel - Design and Construction
ABSTRACT: This paper describes the design and the construction details of a medium size subsonic low-speed wind tunnel, which has been designed to achieve 90 m/s in the working section with expected low intensity turbulence level, making it available for researching in areas such as low speed aerodynamics (flight and terrestrial vehicles), sport activities,
J. Aerosp. Technol. Manag.. Publicado em: 26/02/2018
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7. Numerical Material Model for Composite Laminates in High-Velocity Impact Simulation
Abstract A numerical material model for composite laminate, was developed and integrated into the nonlinear dynamic explicit finite element programs as a material user subroutine. This model coupling nonlinear state of equation (EOS), was a macro-mechanics model, which was used to simulate the major mechanical behaviors of composite laminate under high-veloc
Lat. Am. j. solids struct.. Publicado em: 2017
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8. Failure criterion for adhesively bonded joints using Arcan´s experimental method
Characterization of polymeric materials mechanical behavior requires some previous knowledge about their structure, which allows the choice of more appropriated models and methods. Polymeric materials, below their glass transition temperature (Tg), may be handled as perfect elastic solids, allowing the use of classic mechanics to characterize their behavior.
Polímeros. Publicado em: 2014-08
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9. Theoretical studies of the insertion of carbenes in the zeolite framework: modification of the acidity and creation of chiral sites
Foi realizado um estudo teórico da inserção de carbenos (CH2 e CHCHO) na estrutura cristalina da zeólita Y. O método our own n-layered integrated molecular orbital and molecular mechanics (ONIOM) M062x/6-31G(d,p):PM6 foi utilizado para descrever a inserção do metileno (CH2) nas ligações T-O (T = Si ou Al) da rede resultando em quatro estruturas isô
J. Braz. Chem. Soc.. Publicado em: 2014-06
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10. Mecánica cuántica fundamental, una propuesta didáctica
Fundamental quantum mechanics (FQM) is a commented presentation of fundamental experiments and concepts of quantum mechanics, the physical theory of the quantum phenomena domain: superposition principle and quantum entanglement become the cornestone of the theoretical foundation of the quantum description. The formalism of these basic notions, for two-level
Rev. Bras. Ensino Fís.. Publicado em: 2014-03
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11. Analysis of equal channel angular extrusion by upper bound method and rigid blocks model
In present paper the Equal Channel Angular Extrusion (ECAE) through a rectangular die was firstly physically simulated using plasticine and then theoretically analyzed by upper bound method. Physical simulation was used to identify the deformation zone and as a background for the following theoretical ECAE analysis by rigid block model. The plane strain defo
Mat. Res.. Publicado em: 15/11/2013
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12. A Theoretical investigation of a potential high energy density compound 3,6,7,8-tetranitro-3,6,7,8-tetraaza-tricyclo[3.1.1.1(2,4)]octane
The B3LYP/6-31G (d) density functional theory (DFT) method was used to study molecular geometry, electronic structure, infrared spectrum (IR) and thermodynamic properties. Heat of formation (HOF) and calculated density were estimated to evaluate detonation properties using Kamlet-Jacobs equations. Thermal stability of 3,6,7,8-tetranitro-3,6,7,8-tetraaza-tric
Quím. Nova. Publicado em: 2013