[PDF] Top 20 Lat. Am. j. solids struct. vol.8 número1

... It is shown in this paper that the observed wear rate was higher for the unreinforced aluminium alloy when compared to the Al/TiB 2 reinforced composites.. Wear rate was decreased with i[r] ... See full document

... respectively, therefore, it should be clarified in what sense the differential problem (52), (53) is considered. Equation (52) is posed in the punctured domain Ω, thus the Dirac mass and its derivatives, which are ... See full document

... orientation. Shadin et al. [20] carried out vibration tests on impact damaged composite beam specimens and found decrease in natural frequency accompanied by an increase in damping ratio. There is very limited work on ... See full document

... deformation. The maximum stretching deformation occurs at the centre, and it reduces with the increase of the distance from the centre. Note that an abnormal signal recorded from gauge 1 may be caused by core shear with ... See full document

... in solids, observed that ‘iron, copper and other metals, even single bodies, when subject to a force or weight, curve and bend to the form of an arch before ... See full document

... (Fig. 8) at the close of the period of analysis when the vibration is almost free should be the initial period of vibration of the column in the undamaged ... See full document

... An important observation to make is that the Karush-Kuhn-Tucker [11] equations of this mathematical programming problem correspond exactly to the perfect elasto-plasticity equa- tions with associative flow rule developed ... See full document

... structural elements, commonly used in ships, aircrafts, submarines, offshore drilling rigs, pres- sure vessels, bridges, and roofing units [19, 21]. Most of these structures are required to operate in dynamic ... See full document

... Various authors have evaluated the vibration serviceability of floors under human activities through determination of their dynamic responses, analysis, and experiment from few years ago [24]. Sandun de Silva and ... See full document

... Since the early days of the finite element method era, many elements have been proposed for the analysis of thick plates bending. Some of these elements have been formulated based on Rayleigh-Ritz method, i.e. the ... See full document

... International Conference devoted to “Dynamical Systems – Theory and Applications” hold in December 5-8, 2011 in Łódź, Poland, and it was organized by the staff of Department of Automation and Biomechanics of the ... See full document

... One of the most important problems associated with tunneling is to determine the defor- mation produced by tunnel excavation. Even though this is a key aspect of tunneling, due to many complex factors affecting the ... See full document

... It was presented three ways to work with the Fuzzy controller, namely: (a) Fuzzy supervisory controller of the gain matrix of the LQR control ( G ), (b) Fuzzy controllers in an amount eq[r] ... See full document

... This issue presents selected expanded articles presented at the 11th International Conference devoted to "Dynamical Systems - Theory and Applications" held in December 5-8, 2011 in Poland. The guest ... See full document

... This discrepancy is removed by Ghugal and Shimpi [7] and developed a variationally consistent refined trigonometric shear deformation theory for flexure and free vibration of thick isotr[r] ... See full document

... Figure 8 shows the four types of wheels ...Figs. 8 and 9 these two identical wheels (marked in degrees on the lateral margins) are assembled to form a wheel, therefore an adjustable windows with the desired ... See full document

... The next sub-sections contain the basic relations that will allow to determine the matrices and vec- tors from (3) for electrodes treated as shells modelled with the deformable finite element method (FEM) [8]. A ... See full document

... The fundamental elements of the numerous mechanisms or machines, namely the beams and rods, are most commonly considered as the vibrating stationary systems. In these cases they are treated as the immovable ones without ... See full document

... fast cooling, the process of fractional crystallization commonly produces oscillatory zoning, display- ing very thin zones ranging in thickness from 0.l to 100 microns of Ca-rich and Na-[r] ... See full document

... In order to demonstrate the accuracy and applicability of the present element a number of numerical examples on composites and sandwich laminates are solved by the proposed finite elemen[r] ... See full document