Showing papers in "Composite Structures in 2011"

TL;DR: In this paper, a postbuckling analysis for carbon nanotube-reinforced composite (CNTRC) shells is presented for nanocomposite cylindrical shells reinforced by single-walled carbon nanotsubes subjected to axial compression in thermal environments.

TL;DR: A review of meshless methods for composite structures is given in this paper, with main emphasis on the element-free Galerkin method and reproducing kernel particle method, including static and dynamic analysis, free vibration, buckling and nonlinear analysis.

TL;DR: In this paper, the dynamic stability of microbeams made of functionally graded materials (FGMs) is investigated based on the modified couple stress theory and Timoshenko beam theory, and the boundary points on the unstable regions are determined by Bolotin's method.

TL;DR: In this article, the authors systematically review the modeling techniques along with their capabilities and limitations for characterization of the micro-geometry, mechanical/thermo-mechanical behavior and impact behavior of 3D woven composites.

TL;DR: A study of three nondestructive testing methods (Ultrasonic Testing, InfraRed Thermography and Speckle Shearing Interferometry, known as Shearography) was carried out on different specific types of composite specimens having a variety of defects as mentioned in this paper.

TL;DR: In this article, the free vibration characteristics of microbeams made of functionally graded materials (FGMs) based on the strain gradient Timoshenko beam theory were investigated, where the material properties of the functionally graded beams were assumed to be graded in the thickness direction according to the Mori-Tanaka scheme.

TL;DR: In this paper, a higher order shear deformation theory for elastic composite/sandwich plates and shells is developed, which accounts for an approximately parabolic distribution of the transverse shear strains through the shell thickness and tangential stress-free boundary conditions on the shell boundary surface.

TL;DR: In this paper, the authors present an experimental study of thermal conductivity, compressive strength, first crack strength and ductility indices of recycled PET fiber-reinforced concrete (RPETFRC).

TL;DR: In this article, the convergence properties of a new p-version finite element, which follows third-order shear deformation theory (TSDT), were investigated for variable stiffness composite laminate (VSCL) plates with curvilinear fibers.

TL;DR: In this article, the small scale effect on the vibration analysis of orthotropic single-layered graphene sheets (SLGS) is studied using nonlocal differential constitutive relations of Eringen, and the equations of motion of the nonlocal theories are derived for the graphene sheets.

TL;DR: In this paper, the structural behaviour of reinforced concrete beams strengthened with a system made by fibre nets embedded into an inorganic stabilized cementitious matrix named Fibre Reinforced Cementitious Mortars (FRCM) was investigated.

TL;DR: In this paper, the in-plane displacement components of an arbitrary material point on the midplane of the plate and using Hamilton's principle, the governing equations of motion are obtained which are five highly coupled partial differential equations.

TL;DR: In this article, a closed-form solution for the critical mechanical buckling loads of the FGM cylindrical shells surrounded by an elastic medium is presented. But the authors do not consider the effects of shell geometry, the volume fraction exponent, and the foundation parameters on the critical buckling load.

TL;DR: In this article, a mechanism-based model is proposed to describe the change of effective bond length, stiffness and strength degradation for steel/CFRP double strap joints at elevated temperatures.

TL;DR: In this article, a nonlocal elastic plate model was developed to investigate the vibrational behavior of multi-layered graphene sheets under various boundary conditions, including the interaction of van der Waals forces between adjacent and non-adjacent layers and the reaction from the surrounding media.

TL;DR: An edge-based smoothed finite element method (ES-FEM) with stabilized discrete shear gap (DSG) technique using triangular meshes was proposed to enhance the accuracy of the existing FEM with the DSG for analysis of isotropic Reissner/Mindlin plates.

TL;DR: A free vibration analysis of metal and ceramic functionally graded conical shell panels using the element-free kp-Ritz method is presented in this article, where first-order shear deformation shell theory is used to account for the transverse shear strains and rotary inertia, and mesh-free kernel particle functions are employed to approximate the two-dimensional displacement fields.

TL;DR: In this paper, the linear free flexural vibration of cracked material plates is studied using the extended finite element method using a 4-noded quadrilateral plate bending element based on field and edge consistency requirement with 20 degrees of freedom per element.

TL;DR: In this article, the generalized differential quadrature (GDQ) method is applied to study the dynamic behavior of laminated composite doubly-curved shells of revolution, and the results are compared with those obtained by using commercial programs such as Abaqus, Ansys, Nastran, Straus and Pro/Mechanica.

TL;DR: In this article, a closed-form extension of a spring-based method is presented for modeling the load distribution in multi-bolt composite joints, where bolts and laminates are represented by a series of springs and masses.

TL;DR: In this article, the free vibration of orthotropic arbitrary straight-sided quadrilateral nanoplates using the nonlocal elasticity theory was investigated using the first order shear deformation theory (FSDT).

TL;DR: In this article, a three-dimensional continuum damage mechanics-based material model was implemented in an implicit finite element code to simulate the progressive intralaminar degradation of fiber reinforced laminates.

TL;DR: In this paper, the performance of z-pins on T-joints was investigated at different pull-off load angles between 0° and 45° to the stiffener to induce different proportions of normal tensile and inplane secondary bending stresses along the skin-stiffener bond-line.

TL;DR: In this paper, the Generalized Differential Quadrature (GDQ) was applied to study the dynamic behavior of anisotropic doubly-curved shells and panels of revolution with a free-form meridian resting on Winkler-Pasternak elastic foundations.

TL;DR: In this article, a parametric analysis of a bonded scarf repair of a composite panel was performed, and it was found that the failure stress of a repaired composite panel is more sensitive to the strength of the cohesive elements than to its toughness when a linear or trapezoidal softening traction-separation law is used.

TL;DR: In this paper, a new exact closed-form procedure is presented to solve free vibration analysis of functionally graded rectangular thick plates based on the Reddy's third-order shear deformation plate theory while the plate has two opposite edges simply supported.

TL;DR: In this article, the effect of geometry, dimension and triggering mechanism on the progressive deformation of small-scale composite tubes was analyzed and compared with the standard geometrical shapes such as square and hexagonal cross sections.

TL;DR: In this paper, the buckling analysis of isotropic nanoplates using the two variable refined plate theory and nonlocal small scale effects is presented, which does not require shear correction factors.

TL;DR: In this paper, the thermal buckling effect of orthotropic arbitrary straight-sided quadrilateral nanoplates embedded in an elastic medium is investigated using the classical plate theory (CPT) in conjunction with nonlocal elasticity theory.

TL;DR: In this paper, a representative volume cell (RVC) is chosen to study the uniaxial compressive mechanical properties of the braided composites with different braid angles by combing damage theory and finite element method.