Showing papers in "Composite Structures in 2018"

TL;DR: In this article, the additive layer manufacturing (ALM) process is used in the present investigation to manufacture long fibre reinforced composite parts using the MarkOne® 3D-printer, and the results showed that the obtained mechanical properties for ALM composites are not yet comparable to those obtained by traditional methods (pre-pregs).

TL;DR: In this paper, the buckling and free vibration behaviors of functionally graded (FG) porous nanocomposite plates reinforced with graphene platelets (GPLs) were investigated. And a comprehensive parametric investigation on the influences of the weight fraction and geometric parameters of GPL nanofiller and the porosity coefficient was conducted to identify the most effective way to achieve improved buckling.

TL;DR: In this paper, the authors compared composite sandwich panels composed of auxetic and conventional honeycomb cores and metal facets and compared for their resistance performances against impulsive loadings, taking into account the rate-dependent effects.

TL;DR: In this paper, the size-dependent nonlinear bending of functionally graded porous micro/nano-beams reinforced with graphene platelets and subjected to the uniform distributed load together with an axial compressive load was investigated.

TL;DR: In this paper, the authors reviewed most of the studies carried out from 2000 on optimizing composite structures by representing a classification based on the type of structures and highlighted important parameters of these optimization approaches namely objective functions, design variables, constraints and the applied algorithms.

TL;DR: In this article, the free vibration of functionally graded (FG) porous nanocomposite plates reinforced with a small amount of graphene platelets (GPLs) and supported by the two-parameter elastic foundations with different boundary conditions was investigated.

TL;DR: In this paper, the buckling and free vibration of initially stressed functionally graded cylindrical shell reinforced with non-uniformly distributed graphene platelets (GPLs) are investigated using the state-space formulation based on three-dimensional elasticity theory.

TL;DR: In this paper, a semi-analytical methodology is developed for conducting structural and low-velocity impact analyses based on a modified higher-order shear deformation theory, and the standard mechanics homogenization is implemented through finite element modelling to accurately predict the effective mechanical properties of architected cellular cores.

TL;DR: In this paper, a series of meso-scale numerical models with different shapes and volume fractions of aggregates are developed for examining the effects of aggregate shape on ionic migration.

TL;DR: In this article, a novel integrated manufacturing process based on continuous fiber reinforced thermoplastic composites 3D printing of continuous fibre reinforced composite lightweight structures (CFRCLSss) was proposed.

TL;DR: In this paper, the size dependency in nonlinear large-amplitude vibrational response of functionally graded porous micro/nano-plates reinforced with graphene platelets (GPLs) was explored.

TL;DR: In this article, the bending and vibrational behavior of functionally graded graphene- and carbon nanotube-reinforced composite flat plates are analyzed. And the results demonstrate superior load bearing capacity of the composite plates for both fully aligned and randomly oriented filler configurations.

TL;DR: In this paper, the static linear elasticity, natural frequency, and buckling behavior of functionally graded porous plates reinforced by graphene platelets (GPLs) were investigated within the Isogeometric Analysis framework.

TL;DR: In this article, the postbuckling behavior and nonlinear vibration of a fluid-conveying pipe composed of a functionally graded material were analyzed and the power-law material property was considered as continuously varying across the direction of the pipe wall thickness.

TL;DR: In this paper, a series of adjusted damage criteria allowing a reliable quantification of extents of the most critical defects in drilling carbon fiber reinforced polymer (CFRP) laminates including burrs, tearing, delamination, fiber pullouts and matrix degradation is proposed.

TL;DR: In this paper, the nonlinear bending and vibrational characteristics of porous tubes are analyzed for the first time within the framework of the nonlocal strain gradient theory, a size-dependent model for the tubes with radial inhomogeneity is formulated.

TL;DR: In this article, two numerical models (single layer shell model and stacked shell model) were developed to simulate experimental crushing tests on the square carbon fiber reinforced plastic (CFRP) tube.

TL;DR: In this article, the first auxetic nails are designed, fabricated and experimentally investigated, and the push-in and pull-out performance of auxetic and non-auxetic nails is compared by using two key parameters of the maximum compressive force and the maximum tensile force.

TL;DR: In this paper, two types of innovative chiral stents with auxetic properties are proposed: (a) anti-tetrachiral stent with circular and elliptical nodes; (b) hierarchical anti-to-torch-clustering stent.

TL;DR: In this article, the elastic properties of fiber-reinforced polymer (FRP) structures printed by three-dimensional (3D) printing technology were evaluated. And the results indicated that the level of fibre reinforcements and their orientation arrangement have significant effects on the structural performance of FRP 3D-printed composite sections.

TL;DR: In this article, the linear and nonlinear vibration behaviors of the smart piezoelectric composite plate reinforced by uniformly and non-uniformly dispersing graphene platelets (GPLs) were investigated.

TL;DR: In this article, the effects of winding angles (25°, 50°, 75°, 90°; the 0° winding angle is along the axial direction of the tube) and thicknesses (3-ply, 6ply, 9-ply) on crashworthiness characteristics of carbon fiber reinforced plastics (CFRP) tube and aluminum/cFRP hybrid tube molded by the filament winding technique through quasi-static crushing tests were investigated.

TL;DR: In this article, a systematic study of the basic mechanical properties of ultra-high ductility cementitous composites (UHDCC), including the compressive, tensile and shear properties from normal strength to high strength were investigated.

TL;DR: In this article, the influence of cutting parameters on the drilling process was studied for both CFRP and GFRP laminates, focusing the attention on the measurement of the forces acting on the laminate for several values of cutting speed and feed rate.

TL;DR: In this article, a self-similar hierarchical hexagonal columns (HHC) is proposed to improve structural crashworthiness performance by iteratively adding sub-hexagons at the corners of the primary hexagon.

TL;DR: In this paper, the flexural performance of a series of RC beams externally bonded with carbon fiber-reinforced polymer (CFRP) grid reinforced engineered cementitious composite (ECC) matrix was investigated.

TL;DR: In this article, a simple first-order shear deformation shell theory (S-FSDST) was proposed for free and transient vibration analysis of composite laminated open cylindrical shells with general boundary conditions.

TL;DR: In this article, the nonlinear dynamic behavior of double curved shallow shells with negative Poisson's ratios in auxetic honeycombs on elastic foundations subjected blast, mechanical and damping loads is investigated.

TL;DR: In this article, the authors investigated the structural properties of aluminum sandwich panels with honeycomb core and found that changes in the core parameters have relatively small influences in total energy absorption but sizeable effects on the force-displacement curve and failure modes.