[PDF] Top 20 Lat. Am. j. solids struct. vol.13 número9

... in section 5, notice that despite the simplicity of the numerical model used (elastoplastic beam elements implemented in a commercial package Ls-Dyna), and the lack of details about the[r] ... See full document

... The problem of hollow FG cylinders with internal circumferential cracks subject to transient thermomechanical loads has not been considered in the literature, yet. More specifically, to the best of the authors’ ... See full document

... Here, the accuracy of crack detection is related to the total length of the beam rather than to the correct location of the crack. This is more realistic, since, in practical aerospace and wind ener- gy applications, the ... See full document

... Then, the methodology is applied to the design of two representa- tive engineering systems through multi-objective optimization using the Firefly Colony Algorithm in association with th[r] ... See full document

... Finite element method, parabolic beam, explicit stiffness matrix, strain-based formulation, equilibrium conditions.. An Explicit Stiffness Matrix for Parabolic Beam Element.[r] ... See full document

... It can be seen from Figure 12 that the computed solutions converge monotonically to the exact solutions as the number of grid points increases. Convergence is also more rapid when the moving speed is high. Figure ... See full document

... In this paper, with the definitions of average deflection and average rotation, the governing equa- tions and the boundary conditions were derived from the plane elasticity theory. Based[r] ... See full document

... The DIF (strength) of different HFRC composites obtained using Eq. (6) are compared with the experimentally observed DIF (strength) and the error analysis plot is shown in Figure 5. The aver- age error values are around ... See full document

... where ψ and ϕ are vector and scalar harmonic displacement potentials, respectively, r the position vector, the gradient operator,  the Poisson’s ratio of the isotropic (hypothetic) material. A simi- lar solution seems ... See full document

... On the other hand, triple-layered panels as in Figure 8(a-j) have shown better projectile resistance compared to the double-layered panels. For both 900 m/s and 950 m/s projectiles, all triple-layered panels had ... See full document

... In this research, two stress-based finite element methods includ- ing the curvature-based finite element method (CFE) and the curvature-derivative-based finite element method (CDFE) are[r] ... See full document

... For example, Kaveh and Talatahari (2010 b,c,d , 2012) utilized Charged System Search (CSS) to optimal design of frame, gril- lage and skeletal structures and Imperialist Competitive [r] ... See full document

... Tornabene, F., Fantuzzi, N., Bacciocchi, M. (2014). The local GDQ method applied to general higher-order theories of doubly-curved laminated composite shells and panels: The free vibration analysis. Compos. ... See full document

... Latin American Journal of Solids and Structures 12 (2015) 1771-1789 to Layer 2. In the analyses, it is assumed that all surfaces are frictionless, and only normal tractions can be transmitted across the contact ... See full document

... The PMDI foam investigated in this study had a density of 0.32×10 3 kg/m 3 . The foam samples were made into 15.2-mm-diameter cylinders with three different thicknesses: 7.6 mm, 15.2 mm and 30.5 mm making the aspect ... See full document

... The results of the penetration experiments using conventional ogive-nose and grooved-tapered projectiles with an initial velocity of 1250m/s and an incidence an- gle of 5° perforating t[r] ... See full document

... 1 0.25992 -0.91437 1.34969 -0.46413 0.61059 -0.92914 2 3.16786 -12.65974 3.45185 0.11203 3.20507 1.46431 3 6.29641 -25.17978 6.43419 -0.35032 6.31359 1.19987 4 9.43361 -37.73051 9.52479 -0.52919 9.44485 1.12786 5 12.573 ... See full document

... the fundamental frequencies, while plates have the smallest value of the fundamental frequencies.. In order to carry out nonlinear analysis let us analyze the dependence between the ampl[r] ... See full document

... Figure 13), this agrees with the results of previous experiments conducted at quasi-static strain-rate (Schwarz and Weeks, 1977; Timco and Frederking, 1990; Timco and Weeks, ... See full document

... In the design and fabrication of many engineering structures and machines, vibrational analysis and dynamical response of structures like beams (or rods or shafts) are important factor [r] ... See full document