This paper presents a numerical study on nonlinear free vibration and postbuckling behaviours of functionally graded (FG) graphene origami (GOri)-enabled auxetic metamaterial (GOEAM) tapered beams immersed in fluid, with particular focus the effect negative Poisson's ratio (NPR) frequencies equilibrium paths. The properties novel GOEAM are determined by physics-embedded machine learning based micromechanics model. beam deformation is governed Timoshenko theory von Kármán nonlinearity,...

This paper studies the thermomechanical in-plane dynamic instability of asymmetric restrained functionally graded graphene reinforced composite (FG-GRC) arches, where sheets with atom vacancy defects are distributed along arch thickness according to a power law distribution. The temperature-dependent mechanical properties composites determined by genetic programming (GP) assisted micromechanical model. governing equations for derived Hamilton's principle and solved differential quadrature...

Functionally graded (FG) graphene origami (GOri)-enabled auxetic metamaterial (GOEAM) structures have shown great potential for various engineering applications due to their exceptional mechanical and physical properties such as high strength-to-weight ratio, tuneable stiffness strength, negative Poisson's ratio (NPR). This paper aims investigate the buckling dynamic instability behaviours of FG-GOEAM beams with variable thickness immersed in a fluid, particular focus on influence NPR. The...

This paper investigates the free and forced vibration behaviours of functionally graded graphene origami-enabled auxetic metamaterial (FG-GOEAM) beams submerged in Newtonian fluids, with a particular focus on understanding influence negative Poisson's ratio (NPR) natural frequencies dynamic responses beam. To this end, novel accurate efficient machine learning-assisted model based genetic programming (GP) algorithm theoretical formulations is proposed. The deformation beam governed by...

Introducing origami with outstanding flexibility into thin-walled tubes can enhance their energy absorption performance. This paper first proposes a cutting and folding-based design route of which enables geometry gradients such as uniform, tapered, hourglass-shaped, ellipsoidal shapes. Subsequently, the finite element model proposed tube is established verified through comparisons experimental results. Numerical simulation results demonstrate that quasi-static capability graded closely...

One of the major causes damage to column-supported concrete structures, such as bridges and highways, are collisions from moving vehicles, cars ships. It is essential quantify collision column so that appropriate actions can be taken prevent catastrophic events. A widely used method assess structural through root-mean-square deviation (RMSD) index established by collected data; however, RMSD does not truly provide quantitative information about structure. Conversely, volume ratio only...

This article presents in-plane and out-of-plane free vibration analyses of functionally graded graphene nanoplatelets reinforced composite (FG-GPLRC) arches. The arch is composed multiple layers with (GPLs) that are evenly distributed in each layer but its weight fraction varies layer-by-layer the thickness direction. effective material properties calculated by Halpin-Tsai micromechanics model for Young's modulus rule mixture both mass density Poisson's ratio GPLRC layer. Analytical...

Metal-halide perovskites are rapidly emerging as promising candidates for next-generation solar cells and photoelectric technologies. However, their structural behaviours considering opto-electro-thermo-mechanical properties in multi-physics fields have not yet been fully understood, thus limiting engineering applications. This paper proposes a new opto-electro-thermo-elastic model taking into account photostriction, photothermal effect, electrostriction, piezoelectricity lead halide...

Abstract Photostrictive materials have attracted tremendous interest as the new generation of smart that can achieve a direct conversion from optical energy to mechanical energy. Understanding their nonlinear properties under light illumination is paramount significance for realistic optomechanical applications. This article proposes novel opto-electro-thermo-elastic constitutive model consider effects photostriction, photothermal temperature, and electrostriction metal halide perovskite...

Understanding the interaction between fluid and structures under various conditions is critical for engineering applications, with vortex-induced vibration (VIV) being a significant area of research. This study presents comprehensive numerical investigation on VIV behaviors functionally graded (FG) graphene origami (GOri)-enabled auxetic metamaterial (GOEAM) splitter plates attached to circular cylinder by employing finite element analysis. The plate composed multiple GOEAM layers material...

This paper investigates the free vibration and compressive buckling characteristics of functionally graded graphene nanoplatelets reinforced composite (FG-GPLRC) beams containing open edge cracks by using finite element method. The beam is a multilayer structure where weight fraction (GPLs) remains constant in each layer but varies along thickness direction. effective Young's modulus GPLRC determined modified Halpin-Tsai micromechanics model while its Poisson's ratio mass density are...