This research presents the modeling and analysis for the buckling and postbuckling behavior of sandwich plates under thermal and mechanical loads. The lay-up configurations of plates are laminated composite with concentric stiffener and surface mounted piezoelectric actuators. The plates are in contact with a three-parameter elastic foundation including softening and/or hardening nonlinearity. ...

In this paper, natural frequencies of the sandwich plates with soft flexible core and composite face sheets are obtained. Three-Dimensional (3D) finite element method (FEM) is used for constructing and analyzing of the sandwich plates to obtain their natural frequencies. Continuity conditions for transverse shear stresses at the interfaces as well as transverse flexibility and transverse normal...

The use of composite materials has been increasing in the aeronautical industry for use in primary structures, such as wing and fuselage, where it can significantly save structural weight. Composite laminate optimization can be done as a discrete variable problem constrained by material strength, buckling and natural frequency. The solution for discrete variable problem based on combinatorial o...

Composite micro plates with periodic microstructure at very small length scale have been a focus of intensive research. When the descends below millimetre level, size effects may emerge. To account for effect on elastic wave band gap microscopic composite plates, we propose numerical framework based modified couple stress theory elasto-dynamics associated non-classical 3-node triangular (T3) Mi...

Composite plates in post-buckling regime can experience mode jumping their buckling shape, suddenly increasing the number of half-waves. This phenomenon be advantageous, because shape change could used for local morphing or structural adaptability future aerospace structures. A study this under heating is here presented, combining numerical and experimental techniques. At first, a set parametri...

Selective Laser Sintering (SLS) provides a way to fabricate graphite composite bipolar plates, which significantly reduces time and cost at the research and development stage of bipolar plates, as compared with the conventional fabrication methods of compression molding and injection molding. Different graphite materials (natural graphite, synthetic graphite, carbon black, and carbon fiber) wer...

Engineering structures which are based on laminated composites have a high probability of unexpected damage developing during service. The damaged formations must be monitored from the beginning before they head towards structural failure which could result in substantial damage. This leads to the necessity of a structural health monitoring (SHM) system to be installed during the construction o...

Acoustic emission (AE) signals propagate as the extensional and ßexural plate modes in thin composite plates and plate-like geometries such as shells, pipes, and tubes. The relative amplitude of the two modes depends on the directionality of the source motion. For source motions with large out-ofplane components such as delaminations or particle impact, the ßexural or bending plate mode dominat...

Wang Liang, Bai Rui-xiang*, Yan Cheng State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology, Dalian 116024, P.R. China * Corresponding author: [email protected] Abstract: This paper studies interfacial debonding behavior of composite beams bonded with piezoelectric material. The focus is put on crack initiation and growth of the piezoelectric adhes...