Showing papers in "International Journal of Engineering Science in 2020"

TL;DR: In this article, the size and time-dependent viscoelastic bending analysis of rotating spherical nanostructures made of functionally graded materials (FGMs) is performed, where the structure is assumed to be rotated around two axes with constant angular accelerations.

TL;DR: In this paper, a single-walled composite nano-shell (SWCNS) exposed in a torsional critical stability situation is considered, and the results of the nonlocal model of strain gradient small-scale approach and the first-order shear deformation shell theory (FSDST) are estimated.

TL;DR: In this article, the mechanical strength of piezomagnetic beam-like nanosize sensors during post-buckling was investigated and an effective flexomagnetic property was also taken into account.

TL;DR: In this article, a simplified surface model was proposed to replace the complex modeling of nonlocal integral theory, and the thickness of the surface zone was evaluated from the intrinsic characteristic length.

TL;DR: In this article, a dynamic analysis of functionally graded graphene nanoplatelets reinforced composite (FG-GNPRC) cylindrical nanoshell subjected to a moving harmonic load is investigated.

TL;DR: In this paper, the variational static formulation contributed in [International Journal of Engineering Science 143, 73, 91 (2019) is generalized to model axial and flexural dynamic behaviors of elastic nano-beams by nonlocal strain and stress gradient approaches.

TL;DR: A novel machine-learning based on an evolutionary algorithm, namely Cuckoo search (CS) to solve the local minimum problem of ML in the most radical way and completely outperforms CS, ML, and other hybrid ML in terms of accuracy and considerably reduces calculational costs compared to CS.

TL;DR: In this article, the dynamic behavior of functionally graded (FG) microbeams with different porosity distributions and acted by a moving harmonic load is studied, and the equations describing the motions of the FG microbeam are obtained in the framework of Hamilton's principle in conjunction with the parabolic shear deformation theory.

TL;DR: In this paper, a homogenized model of a pantographic bar considering flexoelectricity is discussed, and the effective stiffness properties of the homogenised bars are determined by the geometry of the structural elements and shear stiffness.

TL;DR: In this paper, a consistent variational theory of the higher-order nonlocal gradient elasticity is conceived to appropriately introduce the nonlocality to the higherorder strain gradient theory, based on appropriate functional spaces of test fields.

TL;DR: In this paper, a non-linear dynamic analysis of torus-shaped and cylindrical shell-like structures has been studied, where the applied material is assumed as the functionally graded material (FGM).

TL;DR: In this article, the authors provide a further step towards the analytical study of "seismic metasurfaces" in real site conditions considering the propagation of Rayleigh waves through a layered porous substrate equipped with local resonators.

TL;DR: In this article, a singularity of stresses and displacements in the vicinity of a mode III crack is discussed and it is shown that inhomogeneity in surface elastic properties may significantly affect the solution and to change the order of singularity.

TL;DR: In this paper, the forced coupled nonlinear mechanics of functionally graded (FG) nanobeams subject to dynamic loads via developing a high-dimensional model is addressed, where a geometric nonlinear Euler-Bernoulli theory is used to define the displacement distribution.

TL;DR: In this paper, a multi-step analytical model was proposed to investigate the synergistic effects of carbon black nanoparticles and micro-scale carbon fibers on the electrical conductivity of the polymer matrix multi-scale nanocomposites.

TL;DR: In this article, the mechanics of functionally graded hard-magnetic soft (FGHMS) beams are investigated, and it is shown that the mechanical properties of HMS structures can be significantly affected by the volume fraction variation of the embedded magnetic particles.

TL;DR: An overview of research efforts to date is presented, from both theoretical and experimental perspectives, to assist in addressing the challenge of developing a reliable and accurate biomechanical model of human coronary arteries.

TL;DR: In this paper, the propagation of transverse surface waves that are so-called whispering gallery waves along a surface of an elastic cylinder with coating is modelled in the framework of linearized Gurtin-Murdoch surface elasticity.

TL;DR: In this paper, the size-dependent buckling instability of shear deformable nanobeams rested on a two-parameter elastic foundation is studied through the stress-driven nonlocal theory of elasticity and the kinematic assumptions of the Timoshenko beam theory.

TL;DR: This paper delves into the use of artificial neural network (ANN) expert systems to predict load-displacement curves of a long bone and the encouraging outcomes exhibit the exceptional ability of artificial Neural networks in capturing the mechanical characteristics of complex structures.

TL;DR: In this paper, a two-dimensional stress-driven nonlocal integral model is introduced for the bending and transverse vibration of rectangular nanoplates for the first time, which satisfies all essential properties, including curvature-moment relations, classical and constitutive boundary conditions, as well as equations of motion of rectangular small-scale plates.

TL;DR: In this article, a quasi-classical shell theory is proposed to analyze the static phenomenon of doubly-curved nanoshells whose made of functionally graded (FG) anisotropic material.

TL;DR: In this paper, the effect of hierarchical order, lattice topology and relative density on piezoelectric and pyroelectric performance of 3D hierarchical lattice ferroelectric metamaterials is explored.

TL;DR: In this article, a two-dimensional pore-scale multicomponent lattice Boltzmann model was developed and used to study water-oil displacement in non-homogeneous pore structures that shared identical topological skeletons and porosities but had different pore size distributions and pore geometries.

TL;DR: In this paper, the grain size dependent super-elasticity and shape memory effect of nanocrystalline NiTi shape memory alloys (SMAs) were investigated to reveal the microscopic mechanism of such a grain size dependence.

TL;DR: In this paper, the effects of quench rate (either water-quenching or air-cooling) on the precipitate microstructure and the mechanical properties, i.e., yield stress, work hardening and ductility, were investigated.

TL;DR: In this paper, the effective properties of non-aging linear viscoelastic composite materials are investigated by solving the microscale periodic local problems obtained via the Asymptotic Homogenization Method (AHM) by means of finite element three-dimensional simulations.

TL;DR: In this paper, the negative Young's modulus in lattice materials has been demonstrated experimentally using additively manufactured titanium-alloy lattice metastructures, where the real part of experimentally measured in-plane Youngs modulus becomes negative under a dynamic environment.

TL;DR: In this article, the performance of a parametrically excited bimorph piezoelectric energy harvester is investigated for the first time, where the performance is significantly enhanced via use of stoppers and an added tip mass in conjunction with parametric excitation.

TL;DR: In this article, a model based on physical ideas and plausible assumptions about the material's microstructure, while being designed for high efficiency and robustness in finite element applications, is presented and tested against experimental data of a simplified bushing under torsional, radial, cardanic and axial loading.