AO4251 Analysis of Composite Structures Syllabus:
AO4251 Analysis of Composite Structures Syllabus – Anna University PG Syllabus Regulation 2021
COURSE OBJECTIVES:
This course will make students
1. To impart knowledge on the macro mechanics of composite materials.
2. To determine stresses and strains in composites and also imparts an idea about the manufacturing methods of composite materials.
3. To get an idea on failure theories of composites.
4. To provide the basic knowledge on the properties of fibre and matrix materials used in commercial composites as well as some common manufacturing techniques.
5. To gain knowledge on the basic concepts of acoustic emission technique.
UNIT I FIBERS, MATRICES, AND FABRICATION METHODS
Production & Properties of Glass, Carbon and Aramid Fibers – Thermosetting and Thermoplastic Polymers – Polymer Properties of Importance to the Composite, Summary of Fabrication Processes – Scope of Composite Materials for Various Aerospace Application.
UNIT II MICROMECHANICS OF A UNIDIRECTIONAL COMPOSITE
Volume and Weight Fractions in a Composite Specimen – Longitudinal Behaviour of Unidirectional Composites – Load Sharing – Failure Mechanism and Strength – Factors Influencing Longitudinal Strength and Stiffness – Transverse Stiffness· and Strength – Prediction of Elastic Properties Using Micromechanics –Typical Unidirectional Fiber Composite Properties – Minimum and Critical Fiber Volume Fractions.
UNIT III MACROMECHANICS APPROACH
Stress Analysis of an Orthotropic Lamina-Hooke’s Law-Stiffness and Compliance Matrices – Specially Orthotropic Material-Transversely Isotropic Material & Specially Orthotropic Material under Plane Stress-Determination of Ex, Ey, Gxy-Stress & Strain Transformations- Transformation of Stiffness and Compliance Matrices-Strengths of an Orthotropic Lamina Using Different Failure Theories.
UNIT IV ANALYSIS OF LAMINATED COMPOSITES
Laminate Strains – Variation of Stresses in a Laminate – Resultant Forces and Moments – Synthesis of Stiffness Matrix – Laminate Description System – Construction and Properties of Special Laminates – Symmetric Laminates – Balanced Laminate – Cross-Ply, and Angle-Ply Laminates – Quasi-isotropic Laminates – Determination of Laminae Stresses and Strains – Determination of Hygrothermal Stresses – Analysis of Laminates after Initial Failure.
UNIT V ANALYSIS OF LAMINATED PLATES AND BEAMS
Governing Equations For Laminated Composite Plates — Governing Equations for Laminated Beams -Application of Theory – Bending, Buckling and Vibration of Laminated Beams and Plates repair-Analysis of sandwich construction-AE technique.
TOTAL: 45 PERIODS
COURSE OUTCOMES:
Upon completion of this course, students will be able
CO1: To calculate the elastic and strength properties of unidirectional laminates using micromechanics theory.
CO2: To analyze a composite laminate using the different failure theories.
CO3: To select the most appropriate manufacturing process for fabricating composite components.
CO4: To demonstrate understanding of the different materials (fibres, resins, cores) used in composites.
CO5: To gain knowledge on non-destructive inspection (NDI) and structural health monitoring of composites.
REFERENCES:
1. Agarwal, BD and Broutman, LJ, “Analysis and Performance of Fibre Composites”, John Wiley & Sons, 3rd edition, 2006.
2. Allen Baker, “Composite Materials for Aircraft Structures”, AIAA Series, 2nd Edition, 2004.
3. Autar K Kaw, “Mechanics of Composite Materials”, CRC Press, 2nd edition, 2005.
4. Calcote, LR, “The Analysis of laminated Composite Structures”, Von – Nostrand Reinhold Company, New York, 1998.
5. Isaac M. Daniel &OriIshai ,“Mechanics of Composite Materials”, OUP USA publishers, 2nd edition, 2005.
6. Lubing, “Handbook on Advanced Plastics and Fibre Glass”, Von Nostran Reinhold Co., New York, 1989.