In the construction of polarization beam-splitters (PBS) and switches a structure can be employed, that is based on the birefringence of periodically laminated dielectric thin films [2,7]. In this work we derive an estimate of the split angle in laminated polarization splitters behaving as negative uniaxial crystals, in the case of oblique incidence. This analysis has been applied to an artific...

In the present work, a zigzag model for symmetric laminated beam is developed. This model uses a sine term to represent the nonlinear displacement field across the thickness as compared to a third order polynomial term in conventional theories. Transverse shear stress and strain are represented by a cosine term as compared to parabolic term. This model satisfies displacement and transverse shea...

Despite the extensive use of thin-walled structures, studies on their behaviours when exposed to extreme thermal environment are relatively scarce. Therefore, this paper aims present buckling analysis composite I-beams under thermo-mechanical loads. The effects investigated for case studied beams undergoing a uniform temperature rise through thickness. theory is based first-order shear deformat...

1 2004 (1) References [1] M. Cho and S. Y. Rhee. Optimization of laminates with free edges under bounded uncertainty subject to extension, bending and twisting. International Journal of Solids and Structures, 41:227–245, 2004. [2] C. Lin and Y. Lee. Stacking sequence optimization of laminated composite structures using genetic algorithm with local improvement. Composite Structures, 63:339–345, ...

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...

Protective clothing performs a vital role in maintaining the safety of human in workplace. The developments in this field are proceeding to fulfill the needs with multifunctional materials at competitive costs. Recently, the protective clothing field introduces the usage of composite materials taking advantage of their outstanding properties. In this paper, the multifunctional performance of hy...

This paper presents a technique to predict the severity and the location of the damage in beam-like composite laminates by using modal parameters as input for an artificial neural network. A laminated cantilever beam is modelled using ANSYS 5.6© finite element software. Normal mode dynamic analyses have been performed for the first three natural modes of intact and damaged beams to find the mod...

Textile structures are engineered and fabricated to meet worldwide structural applications. Nevertheless, research varying textile structure on natural fibre as composite reinforcement was found to be very limited. Most of the research is focusing on short fibre and random discontinuous orientation of the reinforcement structure. Realizing that natural fibre (NF) composite had been widely devel...