JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

UNIT - I

Overview and Introduction: Definition of composite material, Classification based on matrix and topology, Classification and characteristics of composites, Conventional vs. Composite materials, Advantages and limitations, Salient applications in various fields Constituents of composites, Interfaces and Interphases, Distribution of constituents, Nano- composites. Classification of Polymers Properties of Thermo plastics Properties of Thermosetting Plastics, prepreg layup and autoclave processing.

UNIT - II

Fibers and Matrix Materials: Fibers Fabrication, Structure, properties and applications Glass fiber, Boron fiber, carbon fiber, organic fiber, ceramic and metallic fibers whiskers Fabrication of Matrix materials polymers, metals and ceramics and their properties interfaces Wettability Types of bonding at the interface Tests for measuring interfacial strength Physical and chemical properties.

UNIT - III

Processing of Polymer Matrix, Metal Matrix and Ceramic Matrix Composites: Thermoset matrix composites: hand layup, spray, filament winding, Pultrusion, resin transfer molding, autoclave molding bag molding, compression molding with Bulk Molding Compound and sheet Molding Compound thermoplastic matrix composites film stacking, diaphragm forming, thermoplastic tape laying, injection molding interfaces in PMCs structure, properties and application of PMCs recycling of PMCs. Metallic matrices: aluminum, titanium, magnesium, copper alloys processing of MMCs: liquid state, Solid state, in situ fabrication techniques diffusion bonding powder metallurgy techniques interfaces in MMCs. Processing of CMCs: cold pressing, sintering, reaction bonding, liquid infiltration, lanxide process in situ chemical reaction techniques: chemical vapor deposition, chemical vapor impregnation, solgel interfaces in CMCs.

UNIT - IV

Conventional Machining, Mechanics of Operation and Chip Formation: Requirement for machining FRPs, turning, single point cuttings, milling and trimming, drilling. Abrasive cutting, surface finish, fundamental considerations: orthogonal machining, machining of polymers, machining of unidirectional FRPs: chip formation modes, cutting forces, machining of multidirectional laminates: chip formations, cutting forces, modeling of the chip formation process: shear plane models, mechanics model of Zhang, mechanistic modeling.

R16 B.TECH AERONAUTICAL ENGG.

UNIT - V

Nontraditional machining of FRPS and health and safety aspects in machining FRPS: Abrasive water jet machining, laser machining, electric discharge machining. Hazard sources and route exposure, Dust generation in dry machining, aerosol emission in laser machining, work place control.

Expected Results: At the end of this course student would be in a position to work on advance research and development projects on composite materials and its fabrication

TEXT BOOKS:

• 1. Krishnan K Chawla, Composite Materials: Science and Engineering, International Edition, Springer, 2012.
• 2. Jamal Y. Sheikh ahmad, Machining of polymer composites, International Edition, Springer 2009.
• 3. Mallick P.K., Fiber Reinforced Composites: Materials, Manufacturing and Design, CRC press, New Delhi, 2010.

REFERENCES:

• 1. Mechanics of Composite Materials, Autar_K._Kaw, 2006 by Taylor & Francis Group, LLC.
• 2. Mechanics of laminated composite plates and shells theory and Analysis, 2nd ed., J.N Reddy, 2004 by CRC Press LLC. R16 B.TECH AERONAUTICAL ENGG.