Aircraft structures are made of thin-walled as it provides higher stiffness to weight ratio compared solid sections, but is prone buckling due its low and slenderness the individual element. One types that can impact integrity a beam lateral torsional which caused by simultaneous bending twisting cross-sections happens before beam's material strength reached. Therefore, design such structure sh...

Global energy sources such as coal and oil are limited, and the burning of such fossil resources creates pollution problems. Wind energy offers one of several promising clean alternatives to carbon-based fuels. However, the composite materials currently available for producing wind turbine blades cannot accommodate the scale-up of wind energy due to their high price and disposal challenges (e.g...

Fast-growing tree species are important due to their short growth time before they are harvested. Both the Poplar and Eucalyptus species are fast-growing trees. These two species have been cultivated in many parts of the world, and they are used in several ways, including in the pulp and paper industry, as wood-based panels, and as structural composite lumber. In this study, laminated veneer lu...

Finite element stiffness and consistent mass matrices are derived for helically wound, symmetrical composite tubes. The tubular element is considered to have constant cross-section and small deformations restricted to a plane. Each node has three degrees of freedom: axial and transverse displacement and rotation (slope of transverse displacement). Shell theory and lamination theory are used to ...

Abstract In this study, an experimental program was carried out to investigate the dynamic behaviour of post-and-beam mass timber frames, manufactured from LVL structural products, under a sudden column removal scenario. Twenty-five free-fall and two additional static tests were performed on scaled-down frames assembled with three beam-to-column connection types, referred as “Double-beam”, “Meg...

MFC (Microfiber composite) piezoelectric transducers are one of the smart composite materials used among others in alternative energy sources and autonomous wireless sensors which exploit vibrational energy. This work presents theoretical experimental investigations integration on epoxy glass fiber material explores capacity power generation based a variety ambient temperatures frequencies. The...

Hollow waveguide slot antennas, which have the features of low transmission loss and high cross-polarization discrimination (XPD), have been widely employed in communication and radar systems. The fabrication technique called “diffusion bonding of laminated thin metal plates” [1, 2] has been introduced in the realization of multi-layer waveguide structures with high massproductivity. The diffus...

This research investigates the effect of post-cure time on residual stresses in laminated composites. Laminated composites were made of T300 carbon fibers and epoxy resin. The post-cure process was carried out at the constant temperature of 120 °C for 6 and 12 hours for two specimens. The slitting method was employed to determine through-thickness residual stress distribution of the composite l...