Bøger af Dakarapu Santha Rao

A soldadura por fricção (FSW) é um processo de soldadura em estado sólido em que o movimento relativo entre a ferramenta e a peça produz calor que faz com que o material de duas arestas se junte à difusão atómica de plástico. Este método baseia-se na conversão directa de energia mecânica em energia térmica para formar a soldadura sem a aplicação de calor de fonte convencional. A velocidade de rotação da ferramenta, a pressão axial, a velocidade de soldadura e o tempo de soldadura são as principais variáveis que são controladas de modo a fornecer a combinação necessária de calor e pressão para formar a soldadura.

Fiber Reinforced composites (FRP¿s) are used extensively in various industries such as Automobiles, aerospace defence. FRP can be used in domestic applications like door panels, room partitions, wall cladding, food packaging, home appliances and electrical housings. Fiber Reinforced Composites are replacing various metallic structures because of superior properties such as high strength to weight ratio, corrosion resistance and high fatigue life. Glass fiber Reinforced Polymers (GFRPs) are the polymers made of a plastic matrix and reinforced by fine fibres of glass.

Friction stir welding (FSW) is a solid state welding process in which the relative motion between the tool and workpiece produces heat which makes the material of two edges joined plastic atomic diffusion. This method relies on direct conversion of mechanical energy to thermal energy to form the weld without the application of heat from conventional source. The rotational speed of the tool, the axial pressure, weld speed and the weld time are the principle variables that are controlled in order to provide the necessary combination of heat and pressure to form the weld.