Material Domain
Mostrando 13-24 de 187 artigos, teses e dissertações.
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13. Time Domain Modeling and Simulation of Nonlinear Slender Viscoelastic Beams Associating Cosserat Theory and a Fractional Derivative Model
Abstract A broad class of engineering systems can be satisfactory modeled under the assumptions of small deformations and linear material properties. However, many mechanical systems used in modern applications, like structural elements typical of aerospace and petroleum industries, have been characterized by increased slenderness and high static and dynamic
Lat. Am. j. solids struct.. Publicado em: 2017-01
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14. Influence of basal plane domains in the tribological behavior of graphites
ABSTRACT Many dynamic engineering systems have interferences and interactions that causes wear under friction effect. Carbonaceous materials, such as polycrystalline graphites, are of great interest in engineering systems due to their inherent lubricant properties and their versatility as a material for applications in the areas of mechanics, transportation,
Matéria (Rio J.). Publicado em: 2016-09
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15. Simulation of Stress Concentration Problems in Laminated Plates by Quasi-Trefftz Finite Element Models
Abstract Hybrid quasi-Trefftz finite elements have been applied with success to the analysis of laminated plates. Two independent fields are approximated by linearly independent, hierarchical polynomials: the stress basis in the domain, adapted from Papkovitch-Neuber solution of Navier equations, and the displacement basis, defined on element surface. The st
Lat. Am. j. solids struct.. Publicado em: 2016-09
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16. Association between perceived social support and anxiety in pregnant adolescents
Objective: To evaluate the association between perceived social support and anxiety disorders in pregnant adolescents. Methods: We conducted a cross-sectional study with a sample of 871 pregnant women aged 10 to 19 years who received prenatal care in the national public health care system in the urban area of Pelotas, state of Rio Grande do Sul, southern B
Rev. Bras. Psiquiatr.. Publicado em: 04/08/2016
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17. Representaciones sociales de la crisis ambiental en futuros profesores de química
Abstract The environmental crisis as a crisis of civilization emerges from the ineffective interactions between biophysical, social and cultural subsystems, becoming a global risk that transcends the material domain, to be positioned in a category that involves meaning and sense of reality. Ideas, beliefs and concepts that are developed by preservice teacher
Ciênc. educ. (Bauru). Publicado em: 2016-06
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18. How Can We Define Mastery? Reflections on Learning, Embodiment and Professional Identity
In this article we reflect upon the knowledge production process through the body in the social-material arrangement of craft. Resorting to the embodiment paradigm, we aim to theoretically understand how someone reaches the mastery that characterizes the domain of craft skill. In analogy with craft practices, we analyze how knowledge that relies under practi
BAR, Braz. Adm. Rev.. Publicado em: 2015-12
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19. Numeric reconstruction of 2D cellular actomyosin network from substrate displacement
Introduction: One of the fundamental structural elements of the cell is the cytoskeleton. Along with myosin, actin microfilaments are responsible for cellular contractions, and their organization may be related to pathological changes in myocardial tissue. Due to the complexity of factors involved, numerical modeling of the cytoskeleton has the potential to
Res. Biomed. Eng.. Publicado em: 27/11/2015
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20. Domain Transformation and MI of Melt-extracted Co68.15Fe4.35Si12.25B13.25Nb1Cu1 Microwires by Cryogenic Joule Annealing
Giant magneto-impedance (GMI) effect and domain transformation for melt-extracted Co68.15Fe4.35Si12.25B13.25Nb1Cu1 amorphous wires have been induced by a cryogenic Joule annealing (CJA) treatment with different DC current amplitude (0~350 mA) for 240s. Experimental results indicate that the maximum GMI ratio ([ΔΖ∕Ζ0]max) achieves to 188.1% with exciting
Mat. Res.. Publicado em: 17/11/2015
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21. Dynamic Characterization of Frequency Response of Shock Mitigation of a Polymethylene Diisocyanate (PMDI) Based Rigid Polyurethane Foam
Abstract Kolsky compression bar experiments were conducted to characterize the shock mitigation response of a polymethylene diisocyanate (PMDI) based rigid polyurethane foam, abbreviated as PMDI foam in this study. The Kolsky bar experimental data was analyzed in the frequency domain with respect to impact energy dissipation and acceleration attenuation to p
Lat. Am. j. solids struct.. Publicado em: 2015-09
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22. Simulation of the Microstructural Evolution of Pure Material and Alloys in an Undercooled Melts via Phase-field Method and Adaptive Computational Domain
The phase-field methods were developed mainly for studying solidification of pure materials, being then extended to the solidification of alloys. In spite of phase-field models being suitable for simulating solidification processes, they suffer from low computational efficiency. In this study, we present a numerical technique for the improvement of computati
Mat. Res.. Publicado em: 2015-06
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23. Comparative Analysis of Ck- and C0-GFEM Applied to Two-dimensional Problems of Confined Plasticity
AbstractFor many practical applications in engineering, a complex structure shows linear elastic behavior over almost all its extension, but exhibits confined plasticity contained in some small critical regions, e.g. stress concentrations in fillets and sharp internal corners. The behavior of C0- and Ck-GFEM is investigated in this class of problems. The fir
Lat. Am. j. solids struct.. Publicado em: 2015-05
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24. Failure behavior modeling of slender reinforced concrete columns subjected to eccentric load
AbstractThis work presents a numerical model to simulate the failure behavior of slender reinforced concrete columns subjected to eccentric compression loads. Due to the significant influence of the lateral displacements on the loading state provided by an eccentric load, geometric nonlinearity is considered. The responses of the concrete in tension and comp
Lat. Am. j. solids struct.. Publicado em: 2015-03