In order to model prominent failure modes experienced by multi-layered composites, a fine through-thickness discretisation is needed. If the structure also has large in-plane dimensions, computational cost of becomes large. light this, we propose an adaptive isogeometric continuum shell element for analysis structures. The key flexible and efficient method controlling continuity out-of-plane ap...

In this paper, an elastic shell model is presented for postbuckling prediction of a long thinwalledcylindrical shell under axial compression. The Ritz method is applied to solve the governingequilibrium equation of a cylindrical shell model based on the von-Karman type nonlinear differentialequations. The postbuckling equilibrium path is obtained using the energy method for a long thin-walledcy...

This study investigates the higher harmonic generation of Lamb wave at a delamination due to contact acoustic nonlinearity, which is clapping phenomenon between sublaminate surfaces interaction with delamination. In this study, harmonics induced in composite laminates are studied detail. performs both numerical and experimental studies. A three-dimensional finite element model proposed for pred...

European aircraft industry demands for reduced development and operating costs, by 20% and 50% in the short and long term, respectively. Contributions to this aim are provided by the completed project POSICOSS (5FP) and the running follow-up project COCOMAT (6FP), both supported by the European Commission. As an important contribution to cost reduction a decrease in structural weight can be rea...

We apply variational principles to consider two approaches the construction of two-dimensional equations theory stationary heat conduction composite plates. The temperature plates is approximated by a polynomial in transverse coordinate with unknown coefficients expansion. Within framework first approach, thermal boundary conditions on front surfaces are neglected but obtained Euler and corresp...

This study presents a comprehensive frame-invariant fractional-order framework for the geometrically nonlinear bending and postbuckling analysis of nonlocal plates subject to combined thermal mechanical loads. The kinematic framework, unlike classical formulations based on integer-order mechanics, is positive-definite thermodynamically consistent. nature enables application variational principl...

in this paper, the bernstein polynomials are used to approximate the solutions of linear integral equations with multiple time lags (iemtl) through expansion methods (collocation method, partition method, galerkin method). the method is discussed in detail and illustrated by solving some numerical examples. comparison between the exact and approximated results obtained from these methods is...

Optimization concept in the context of shear deformation theories was born for the development of accurate models to study the bending problem of structures. The present study seeks to extend such an approach to the dynamic analysis of plates. A compact and unified formulation with non-polynomial shear strain shape functions (SSSFs) is employed to develop a static and free vibration analysis of...