This paper presents the results from an experimental study on the actuation response of composite laminates containing Shape-Memory Alloy (SMA) actuators. Unidirectional glassfibre reinforced epoxide laminates were constructed containing Ni-Ti SMA actuators orientated parallel to the glass-fibre direction. The volume fraction of actuator was varied in the range 0 to 2.5 ~ 0 1 % . These laminate...

Failures in composite materials occur mainly due to interlaminar fracture, also called delamination, between laminates. This indicates that characterizing interlaminar fracture toughness is the most effective factor in the fracture of composite materials. This study reports investigation on mixed-mode interlaminar fracture behaviour in woven carbon fibre/polyetherimide (CF/PEI) thermoplastic co...

in this paper, a closed form solution for bending and free vibration analyses of simply supported rectangular laminated composite plates is presented. the static and free vibration behavior of symmetric and antisymmetric laminates is investigated using a refined first-order shear deformation theory. the winkler–pasternak two-parameter model is employed to express the interaction between the lam...

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...

A stable method of calculation of the electromagnetic response of planar anisotropic laminates to an active source with limited distribution along the strata direction is developed. The laminates can be sandwiched between isotropic, anisotropic, or perfectly conducting covers/substrates. The source is either inside the laminates or in the cover or substrate. Based on the propagator matrix metho...

Demands for increased performance and efficiency of mechanical and electromechanical components impose challenges on their engineering design and optimization, as well as on the types of materials utilized in their construction. Demands on materials imposed by new and rigorous applications have become so diverse and severe that single-component materials used alone cannot meet them. It is frequ...

A wood-based prepreg was formed using vacuum assisted resin transfer molding (VARTM) and a low viscosity thermoplastic resin. Wood strands were assembled to make porous mat for injection. The filled most of the cavities inside wood cells resulting in void volume fraction 7%. Young’s modulus strength saturated 38% 124% higher, respectively, than those prior infusion. Flat laminates produced by t...

Bistable composite laminates are smart composites that have been employed for engineering structures due to their superlative offering of features like ability change shape and low densities. Because the embedded geometrical nonlinearity factor, a small variation input parameters leads significant changes in response bistable laminates. In other words, Uncertainty Quantification (UQ)...

Problem statement: This study presents the results of ANFIS based model proposed for predicting the performance characteristics of reinforced HSC beams subjected to different levels of corrosion damage and strengthened with externally bonded glass fibre reinforced polymer laminates. Approach: A total of 21 beams specimens of size 150, 250×3000 mm were cast and tested. Results: Out of the 21 spe...

The active structural health monitoring (SHM) approach for the complex composite laminate structures of wind turbine blades (WTBs), addresses the important and complicated problem of signal noise. After illustrating the wind energy industry's development perspectives and its crucial requirement for SHM, an improved redundant second generation wavelet transform (IRSGWT) pre-processing algorithm ...