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Mostrando 112 de 205321 artigos, teses e dissertações.

1. Damage identification from uniform load surface using continuous and stationary wavelet transforms
Derived from flexibility matrix, Uniform Load Surface (ULS) is used to identify damages in beamtype structures. This method is beneficial in terms of more participating the lower order modes and having less prone to noise and irregularities in the measured data in comparison with the original flexibility matrix technique. Therefore, these characteristics ma
Lat. Am. j. solids struct.. Publicado em: 30/09/2014

2. Stochastic multiscale analysis of homogenised properties considering uncertainties in cellular solid microstructures using a firstorder perturbation
Randomness in the microstructure due to variations in microscopic properties and geometrical information is used to predict the stochastically homogenised properties of cellular media. Two stochastic problems at the microscale level that commonly occur due to fabrication inaccuracies, degradation mechanisms or natural heterogeneity were analysed using a sto
Lat. Am. j. solids struct.. Publicado em: 30/09/2014

3. Finite element modeling for buckling analysis of hybrid piezoelectric beam under electromechanical loads
A onedimensional finite element model for buckling analysis of hybrid piezoelectric beams under electromechanical load is presented in this work. The coupled zigzag theory is used for making the model. The inplane displacement is approximated as a combination of a global third order variation across the thickness with an additional layer wise linear variati
Lat. Am. j. solids struct.. Publicado em: 30/09/2014

4. Stability of concrete beamcolumns under follower forces
An axial follower force acting on the free end of a beamcolumn is known to remain tangential to its elastica at that point. Elastic beamcolumns exhibit infinitely high buckling resistance to static compressive follower load. Loss of their dynamic stability is known to occur at critical follower loads, by flutter characterized by vanishing lateral displacem
Lat. Am. j. solids struct.. Publicado em: 30/09/2014

5. Dynamic pullin instability of geometrically nonlinear actuated microbeams based on the modified couple stress theory
This paper investigates the dynamic pullin instability of vibrating microbeams undergoing large deflection under electrosatically actuation. The governing equation of motion is derived based on the modified couple stress theory. Homotopy Perturbation Method is employed to produce the high accuracy approximate solution as well as the secondorder frequency
Lat. Am. j. solids struct.. Publicado em: 30/09/2014

6. A single loop reliabilitybased design optimization using EPM and MPPbased PSO
A reliabilitybased design optimization (RBDO) incorporates a probabilistic analysis with an optimization technique to find a best design within a reliable design space. However, the computational cost of an RBDO task is often expensive compared to a deterministic optimization, which is mainly due to the reliability analysis performed inside the optimization
Lat. Am. j. solids struct.. Publicado em: 30/09/2014

7. Application of nonlocal elasticity and DQM to dynamic analysis of curved nanobeams
In this paper, a new numerical technique, the differential quadrature method (DQM) has been developed for dynamic analysis of the nanobeams in the polar coordinate system. DQ approximation of the required partial derivatives is given by a weighted linear sum of the function values at all grid points. A semicircular arch with smallscale effects is investigat
Lat. Am. j. solids struct.. Publicado em: 30/09/2014

8. Vibration of plate on foundation with four edges free by finite cosine integral transform method
The analytical solutions for the natural frequencies and mode shapes of the rectangular plate on foundation with four edges free is presented by using the finite cosine integral transform method. In the analysis procedure, the classical Kirchhoff rectangular plate is considered and the foundation is modelled as the Winkler elastic foundation. Because only ar
Lat. Am. j. solids struct.. Publicado em: 30/09/2014

9. A numerical study on seismic response of selfcentring precast segmental columns at different posttensioning forces
Precast bridge columns have shown increasing demand over the past few years due to the advantages of such columns when compared against conventional bridge columns, particularly due to the fact that precast bridge columns can be constructed off site and erected in a short period of time. The present study analytically investigates the behaviour of selfcentr
Lat. Am. j. solids struct.. Publicado em: 30/09/2014

10. Simple extension of Lemaitre's elastoplastic damage model to account for hydrolytic degradation
Being motivated by the technological applications of bioabsorbable polymeric materials in the fields of biomechanics and medicine, this paper presents a simple but efficient extension of Lemaitre's elastoplastic damage model by incorporating a chemicalbased (hydrolysis) degradation term. The aim is to allow the simulation of devices subjected to both mechan
Lat. Am. j. solids struct.. Publicado em: 30/09/2014

11. Clinical and Histological Features of Multifocal Canalicular Adenomas of the Upper Lip
O adenoma canalicular (AC) é uma rara neoplasia benigna de glândula salivar que ocorre com maior frequência em lábio superior. Apesar de sua natureza benigna, alguns pacientes podem apresentar múltiplos nódulos, além de apresentar microscopicamente um crescimento multifocal com focos de neoplasia na glândula adjacente.
Braz. Dent. J.. Publicado em: 31/08/2014

12. Hybrid stress and analytical functions for analysis of thin plates bending
In this paper, two efficient elements for analyzing thin plate bending are proposed. They are a triangular element (THS) and a quadrilateral element (QHS), which have 9 and 12 degrees of freedom, respectively. Formulations of these elements are based on hybrid variational principle and analytical homogeneous solution of thin plate equation. Independent field
Lat. Am. j. solids struct.. Publicado em: 31/07/2014