ABSTRACT

Fiber-reinforced polymer (FRP) composites have been used as an engineering material for more than six decades. The main attraction of FRP is its superior strengthto-weight ratio. The aerospace industry has been spending billions of dollars on investment in these composites to produce lightweight subsonic and supersonic aircrafts. Its other desirable properties, such as the ease of fabrication of complex shapes and the ability to tailor desirable properties to suit different engineering applications, are enviable for an advanced material. Since research and development in the aircraft

10.1 Introduction: Advance Composite Structures............................................... 339 10.1.1 Composite Structural Damage .......................................................... 342

10.2 Fiber-Optic Sensors ...................................................................................... 345 10.2.1 FBG Sensors ..................................................................................... 345

10.2.1.1 Evolution of FBG Sensors ..................................................346 10.2.1.2 Embedding FBG Sensors in FRP Structures .....................348