Composite materials are highly suitable to withstand with mechanical loads compared to conventional materials. At present, these materials are being substituted with composite materials due to their superior properties and broadly used in aerospace industries and other industries. In this work, investigations are conducted out to determine the mechanical properties of composite laminates, for various orientations (0°/30°/45°/60°) of kevlar fibres with glass fibres. The different mechanical testing such as tensile test, flexural test and dynamic Mechanical Properties of the hybrid composite material with various orientations of the top and bottom Kevlar laminates were evaluated. It is concluded that the Fabricated hybrid composites with 0° orientation of the Kevlar fibres exhibit higher tensile Strength as well as flexural strength compared to the composites with oriented kevlar fibres (30°/45°/60°). The increased mechanical properties of the 0° hybrid is due the alignment of the kevlar fibres in loading direction which causes it to act as the primary load bearing structure whereas in the oriented hybrid composites the glass fibre acts as the initial load bearing structure.

The wind energy is more reliable, clear, and easilyexploitable form of renewable energy source. Wind turbines are being stationed to capture the wind’s power and convert it to electricity. The wind turbines are operated at rated speed to ensure smooth operation. When the wind turbine faces the higher wind speed, wind forceimpacts the tower head causing immediate damage the turbine blade. Wind turbines are equipped with various Aerodynamic braking systems and mechanical braking system to control the over speeding of the wind turbine rotor at extreme wind velocity. In this novelmethodology, it is attended to reduce the rotational speed of the wind turbine aerodynamically by providing the chord wise slot (opening). The slot modifies the pressure distribution over the upper side and lower side of the turbine blade that slows down the rotational speed of the wind turbine within the safe limit. In this present attempt, the over speeding of the wind turbine rotor is effectively controlled without disturbing the power generation. The different parameters of the slot such as the position of the slot, inclination of the slot, and width of the slot are studied and the slot parameters are computationally optimized.

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