CLASSIFICATION OF COMPOSITES 3.1. 3.1.2. By the type of matrix — polymer, metal, ceramic, and carbon. Polymer dispersive phases are typically used to increase the modulus of elasticity, yield strength, tensile strength, and/or provide stability over the life of the product. polymer matrix composite provides strength and stiffness that are lacking in the matrix. The function of the relatively weak matrix is to bond the fibers The com-posite is designed so that the mechanical loads to which the structure is subjected in service are supported by the reinforcement. Classification: Particle, fiber, structural woven fibers 0.5mm cross section view 0.5mm ... eg. Classification of Polymers based on the Structure of the Monomer Chain. Polymer Matrix Composite ( PMC ) 3.1.1. very popular due to its low cost and simple fabrication methods. discontinuous-fiber composites are used where cost is the main driver and strength and stiffness are less important. Classification of Composites Composites are classified 1. Paticulate Composites: Particulate Composites consist of particles immersed in matrices such as alloys and ceramics. By the geometry of the reinforcement — particulate, flake, and fibers 2. Composites are typically classified by the type of dispersive phase used: particle reinforced , fiber reinforced , or structural . * * 3.2. Nieh, "Creep rupture of a silicon-carbide reinforced aluminum composite", Metall. In addition, there are the composites, combinations of two or more of the above three basic material classes. 1.3. two types of polymer matrices are shown: ther-mosets and thermoplastics. Both the reinforcement type and the matrix af-fect processing. thermoplastic polymer Composite will fail at lower fracture strain If we assume that strain-to-failure of fiber is less than strain-to-failure of matrix as is most common: i.e. Reinforcement (fibre/ filler) 3.2.1. Natural. The structure of polymers containing long and straight chains fall into this category. Trans. The classifications according to types of rein-forcement are particulate composites (composed of particles), fibrous composites This category has the following classifications: Linear Polymers. Use of non reinforced polymers as structure materials is limited by its mechanical properties. Composite Benefits fiber-reinf un-reinf particle-reinf Force • PMCs: Increased E/r E(GPa).1 G=3E/8 1 10 102 103 metal/ metal alloys polymers PMCs ceramics Chapter 16 -25 Bend displacement K=E Density, r [mg/m3].1 .3 1 3 10 30.01 Adapted from T.G. This scheme is based primarily on chemical makeup and atomic structure, and most materials fall into one distinct grouping or another, although there are some intermediates. Review 5 on Metals, Ceramics, Polymers, and Composites Chapter 16 Understand the concept of composite Understand classification of composites by matrix materials Understand classification of composites by reinforcement type Understand the major improvement in properties of … Classification of Composites On the basis of matrix phase, composites can be classified into metal matrix composites (MMCs), ceramic matrix composites (CMCs), and polymer matrix composites (PMCs) (Figure 1.1) [3]. classifications: metals, ceramics, and polymers. poly-vinyl chloride is largely used for making pipes and electric cables is an example of a linear polymer. the major processing routes for polymer matrix composites are shown in Fig. The major composite classes include Organic Matrix Composites (OMCs), Metal Matrix Composites (MMCs) and Ceramic Matrix Composites (CMCs). 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