1940 Hakim S. Sultan Alibori in stringent conditions, high pressure temperature, highly corrosive environments, which the conventional materials failed to service. This has triggered the development needs for engineered materials to cater to customized needs. Industry has recognized the ability of composite materials to produce high-quality, durable, cost-effective products. In recent years there is an increasing demand in the use of composite materials for the automotive, aerospace and rail industry. The automotive and aerospace applications over the past quarter-century have been primarily in special areas such as energy absorber devices. When using composite in the body structure of a vehicle, considerable weight reductions can be achieved compared to conventional isotropic structures, which leads to reduced fuel consumption and consequently lower carbon dioxide emissions Material Constituents The major constituents in a fiber-reinforced composite material are the reinforcing fibers and the matrix. FRC can be classified into broad categories according to the matrix used: polymer, Metal, ceramic, and carbon Polymer matrix composite include thermoset or thermoplastic resins reinforced with glass fiber, carbon(graphite) aramid(Kevlar), or boron fibers. They are used primarily in relatively low temperature application. Metal matrix composite consists of metal or alloys reinforced with boron, carbon(graphite), or ceramic fibers Composite materials were developed because no single, homogeneous structural material could be found that had all of the desired attributes for a given application in the aerospace industry [3] Ibre One of the most commonly used fibers among the new composite materials is the carbon fiber. Among the advantages of carbon fibers is their exceptionally high tensile strength to weight ratio as well as tensile modulus to weight ratios, high fatigue strength and very low coefficient of linear thermal expansion. Where they can maintain their strength up to 2000oC, thus providing the dimensional stability required in space applications. Due to the high cost of these fibers: they are mostly used in the aerospace industry, where weight saving is more critical than cost. Glass fibers commonly used are the E-glass and S-lass. In addition to these glass types there are others that are not usually included in advanced composites because they are used in different fields. For example, the C-glass: is used for chemical resistance in the manufacture of tanks, ducts, blower hoods, fan housings, and other structures. where resistance to corrosion is required Another new fiber gaining wide acceptance is Kevlar. It also has a unique property to a degree which neither Carbon nor glass fibers have that is adequate fracture toughness. There are two types of Kevlar: Kevlar 29 and Kevlar 49. The Kevlar that usually finds its way into structures is Kevlar 49. It is of equal strength but has a higher modulus than Kevlar 29. Unlike Carbon fibers, Kevlar does not conduct electricity. It also has a low compressive strength and modulus compared to the high tensile properties. Kevlar acts more like a glass fiber to transmit electric radiation such as antenna windows1940 Hakim S. Sultan Aljibori in stringent conditions, high pressure & temperature, highly corrosive environments, which the conventional materials failed to service. This has triggered the development needs for engineered materials to cater to customized needs. Industry has recognized the ability of composite materials to produce high-quality, durable, cost-effective products. In recent years there is an increasing demand in the use of composite materials for the automotive, aerospace and rail industry. The automotive and aerospace applications over the past quarter-century have been primarily in special areas such as energy absorber devices. When using composite in the body structure of a vehicle, considerable weight reductions can be achieved compared to conventional isotropic structures, which leads to reduced fuel consumption and consequently lower carbon dioxide emissions. Material Constituents The major constituents in a fiber-reinforced composite material are the reinforcing fibers and the matrix. FRC can be classified into broad categories according to the matrix used: polymer, Metal, ceramic, and carbon. Polymer matrix composite include thermoset or thermoplastic resins reinforced with glass fiber, carbon (graphite). aramid (Kevlar), or boron fibers. They are used primarily in relatively low temperature application. Metal matrix composite consists of metal or alloys reinforced with boron, carbon (graphite), or ceramic fibers. Composite materials were developed because no single, homogeneous structural material could be found that had all of the desired attributes for a given application in the aerospace industry [3]. Fibre One of the most commonly used fibers among the new composite materials is the carbon fiber. Among the advantages of carbon fibers is their exceptionally high tensile strength to weight ratio as well as tensile modulus to weight ratios, high fatigue strength and very low coefficient of linear thermal expansion. Where they can maintain their strength up to 2000°C, thus providing the dimensional stability required in space applications. Due to the high cost of these fibers: they are mostly used in the aerospace industry, where weight saving is more critical than cost. Glass fibers commonly used are the E-glass and S-lass. In addition to these glass types: there are others that are not usually included in advanced composites because they are used in different fields. For example, the C-glass: is used for chemical resistance in the manufacture of tanks, ducts, blower hoods, fan housings, and other structures, where resistance to corrosion is required. Another new fiber gaining wide acceptance is Kevlar. It also has a unique property to a degree which neither Carbon nor glass fibers have that is adequate fracture toughness. There are two types of Kevlar: Kevlar 29 and Kevlar 49. The Kevlar that usually finds its way into structures is Kevlar 49. It is of equa1 strength but has a higher modulus than Kevlar 29. Unlike Carbon fibers, Kevlar does not conduct electricity. It also has a low compressive strength and modulus compared to the high tensile properties. Kevlar acts more like a glass fiber to transmit electric radiation such as antenna windows