Numerical Approach
Mostrando 37-48 de 495 artigos, teses e dissertações.
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37. Investigation of the Roof Presplitting and Rock Mass Filling Approach on Controlling Large Deformations and Coal Bumps in Deep High-Stress Roadways
Abstract Roadway deformation and coal bumps are major challenges for underground engineering. Taking the Lu'an mining district in Shanxi Province as an example, the failure mechanism of deep high-stress roadway was studied. Numerical simulations and the similar material test were performed to investigate the effect of the roof presplitting and rock mass fill
Lat. Am. j. solids struct.. Publicado em: 27/05/2019
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38. An efficient mechanical-probabilistic approach for the collapse modelling of RC structures
Resumo As estruturas em concreto armado são largamente utilizadas ao redor do mundo. Entretanto, a modelagem de seu complexo comportamento mecânico por formulações numéricas eficientes tem sido marginalmente apresentada na literatura. As formulações eficientes possibilitam a precisa e realista representação dos fenômenos mecânicos envolvidos e sã
Rev. IBRACON Estrut. Mater.. Publicado em: 20/05/2019
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39. Sensitivity Analysis of Flexible Rotor Subjected to Interval Uncertainties
Abstract This paper aims at analyzing the sensitivity of the structural response of flexible rotors subjected to uncertain interval parameters. The interval approach encompasses both an uncertainty and sensitivity analyses. The uncertainty analysis consists in computing the interval uncertain structural responses by using the global optimization method. The
Lat. Am. j. solids struct.. Publicado em: 13/05/2019
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40. Solution of the 1d Schrödinger Equation for a Symmetric Well
Abstract We suggest a mathematical potential well with spherical symmetry and apply to the 1d Schrödinger equation. We use some well known techniques as Stationary Perturbation Theory and WKB to gain insight about the solutions and compare them each other. Finally, we solve the 1d Schrödinger equation using a numerical approach with the so-called Numerov t
Rev. Bras. Ensino Fís.. Publicado em: 25/04/2019
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41. Developing Flexibility in Mental Calculation
Resumo: A flexibilidade na realização de cálculos mentais tornou-se um foco importante para os educadores em matemática, com pesquisas surgindo nas últimas duas décadas. Resultados de pesquisas contemporâneas oferecem sólido suporte para o desenvolvimento da flexibilidade mental no ensino fundamental. Este estudo concentra-se em três temas inter-rel
Educ. Real.. Publicado em: 11/04/2019
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42. New hybrid approach for free vibration and stability analyses of axially functionally graded Euler-Bernoulli beams with variable cross-section resting on uniform Winkler-Pasternak foundation
Abstract In this paper, a new hybrid approach is presented based on the combination of the power series expansions and the Rayleigh-Ritz method for stability and free vibration analyses of axially functionally graded non-uniform beams resting on constant Winkler-Pasternak elastic foundation. In the proposed novel technique, the power series approximation is
Lat. Am. j. solids struct.. Publicado em: 08/04/2019
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43. Two-Dimensional Numerical Model of the Fracture Process in Steel Fibre Reinforced Concrete with the Continuum Strong Discontinuity Approach and Functional Data Analysis
Abstract This paper presents the formulation of a two-dimensional numeri-cal model able to describe the fracture process in structural mem-bers of steel fibre reinforced concrete (SFRC) from the volume ratio of the fibres and the mechanical properties of the compo-nents: a concrete matrix and a set of steel fibres with a random orientation. The relationship
Lat. Am. j. solids struct.. Publicado em: 08/04/2019
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44. A Numerical Modelling of Mixed Mode Crack Initiation and Growth in Functionally Graded Materials
The main objective of this work is to present a numerical modeling of crack propagation path in isotropic functionally graded materials (FGMs) under mixed-mode loadings. The displacement extrapolation technique (DET) and the maximum circumferential stress (MCS) criterion are investigated in the context of crack growth in functionally graded beam subject to t
Mat. Res.. Publicado em: 04/04/2019
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45. Analytical solution for the stationary model of pollutant propagation in an aquatic medium
Resumo Este trabalho apresenta uma nova abordagem analítica para a solução de problemas de dispersão de poluentes ao longo de corpos hídricos com contornos irregulares. Nesta abordagem, a equação advectivo-difusiva é expressa em termos de coordenadas curvilíneas ortogonais que são definidas pelo potencial de velocidade e pela função de corrente c
Rev. Ambient. Água. Publicado em: 25/03/2019
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46. An SHM approach using machine learning and statistical indicators extracted from raw dynamic measurements
Abstract Structural Health Monitoring using raw dynamic measurements is the subject of several studies aimed at identifying structural modifications or, more specifically, focused on damage assessment. Traditional damage detection methods associate structural modal deviations to damage. Nevertheless, the process used to determine modal characteristics can in
Lat. Am. j. solids struct.. Publicado em: 14/03/2019
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47. GFEM STABILIZATION TECHNIQUES APPLIED TO DYNAMIC ANALYSIS OF NON-UNIFORM SECTION BARS
Abstract The Finite Element Method (FEM), although widely used as an approximate solution method, has some limitations when applied in dynamic analysis. As the loads excite the high frequency and modes, the method may lose precision and accuracy. To improve the representation of these high-frequency modes, we can use the Generalized Finite Element Method (GF
Lat. Am. j. solids struct.. Publicado em: 29/10/2018
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48. Numerical stress-life curves for the AISI 4340 steel using two sets of materials properties and different bi-axial stress ratios
Abstract Fatigue assessments by the more robust strain-based approach demand the determination of the local strain history from nominal stresses. For notched members, a cyclic constitutive relation, the stress concentration factor (SCF) and a strain concentration rule are used with this aim in some approximate solutions. The plastic part of the cyclic consti
Lat. Am. j. solids struct.. Publicado em: 29/10/2018