JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Prerequisite

Structure and properties of composite materials and design procedures for composite

structures

Course objectives:

• 1. To identify the properties of fiber and matrix materials used in commercial composites as well as some common manufacturing teaching
• 2. To predict the elastic properties of both long and short fiber
• 3. Understand the stress-strain relations.
• 4. To know macro mechanical analysis of lamina and laminates.
• 5. Establish the failure criteria for laminated structures.

Course Outcomes

At the end of the course the students will be able to

• 1. Understand and differentiate various types of composites.
• 2. Understand different types of reinforcements and describe various manufacturing methods of composites
• 3. Analyze problems on macro and micro mechanical behavior of lamina
• 4. Analyze problems on macro mechanical behavior of laminate
• 5. Use the ideas developed in the analysis of composites towards using composites in aerospace design.

UNIT - I

Introduction to Composite Materials: Introduction ,Classification Polymer Matrix Composites, Metal Matrix Composites, Ceramic Matrix Composites, Carbon–Carbon Composites, Fiber-Reinforced Composites and nature-made composites, and applications .

UNIT - II

Reinforcements: Fibers- Glass, Silica, Kevlar, carbon, boron, silicon carbide, and born carbide fibers. Particulate composites, Polymer composites, Thermoplastics, Thermosetts, Metal matrix and ceramic composites. Manufacturing methods: Autoclave, tape production, moulding methods, filament winding, man layup, pultrusion, RTM.

UNIT - III

Macro mechanical Analysis of a Lamina: Introduction, Definitions Stress, Strain, Elastic Moduli, Strain Energy. Hooke’s Law for Different Types of Materials, Hooke’s Law for a Two-Dimensional Unidirectional Lamina, Plane Stress Assumption, Reduction of Hooke’s Law in Three Dimensions to Two Dimensions, Relationship of Compliance and Stiffness Matrix to Engineering Elastic Constants of a Lamina.

UNIT - IV

Macro mechanical Analysis of Laminates: Introduction, Laminate Code, Stress–Strain Relations for a Laminate, In-Plane and Flexural Modulus of a Laminate, Hygro-thermal Effects in a Laminate, Warpage of Laminates.

UNIT - V

Failure, Analysis, and Design of Laminates: Introduction, Special Cases of Laminates, Failure Criterion for a Laminate, Design of a Laminated Composite, Other Mechanical Design Issues.

R22M.Tech. CAD/CAM JNTUH

TEXT BOOKS:

• 1. Mechanics of Composite Materials, Second Edition (Mechanical Engineering), By AutarK. Kaw, Publisher: CRC.
• 2. Engineering Mechanics of Composite Materials by Isaac and M Daniel, Oxford University Press, 1994.

REFERENCE BOOK:

• 1. Analysis and performance of fibre Composites by B. D. Agarwal and L. J. Broutman, Wiley- Inter science, New York, 1980. R22M.Tech. CAD/CAM JNTUH M. TECH. II Year I Sem. (CAD/CAM)