ME2030 COMPOSITE MATERIALS L T P C
3 0 0 3
· To understand the fundamentals of composite material strength and its mechanical behavior Understanding the analysis of fiber reinforced Laminate design for different
· combinations of plies with different orientations of the fiber.
· Thermo-mechanical behavior and study of residual stresses in Laminates during processing. Implementation of Classical Laminate Theory (CLT) to study and
analysis for residual stresses in an isotropic layered structure such as electronic chips.
UNIT I INTRODUCTION, LAMINA CONSTITUTIVE EQUATIONS & MANUFACTURING 12
Definition –Need – General Characteristics, Applications. Fibers – Glass, Carbon, Ceramic and Aramid fibers. Matrices – Polymer, Graphite, Ceramic and Metal Matrices
– Characteristics of fibers and matrices. Lamina Constitutive Equations: Lamina
Assumptions – Macroscopic Viewpoint. Generalized Hooke’s Law. Reduction to Homogeneous Orthotropic Lamina – Isotropic limit case, Orthotropic Stiffness matrix (Qij), Typical Commercial material properties, Rule of Mixtures. Generally Orthotropic Lamina –Transformation Matrix, Transformed Stiffness. Manufacturing: Bag Moulding – Compression Moulding – Pultrusion – Filament Winding – Other Manufacturing Processes
UNIT II FLAT PLATE LAMINATE CONSTITUTE EQUATIONS 10
Definition of stress and Moment Resultants. Strain Displacement relations. Basic Assumptions of Laminated anisotropic plates. Laminate Constitutive Equations – Coupling Interactions, Balanced Laminates, Symmetric Laminates, Angle Ply Laminates, Cross Ply Laminates. Laminate Structural Moduli. Evaluation of Lamina Properties from Laminate Tests. Quasi-Isotropic Laminates. Determination of Lamina stresses within Laminates.
UNIT III LAMINA STRENGTH ANALYSIS 5
Introduction - Maximum Stress and Strain Criteria. Von-Misses Yield criterion for Isotropic Materials. Generalized Hill’s Criterion for Anisotropic materials. Tsai-Hill’s Failure Criterion for Composites. Tensor Polynomial (Tsai-Wu) Failure criterion. Prediction of laminate Failure
UNIT IV THERMAL ANALYSIS 8
Assumption of Constant C.T.E’s. Modification of Hooke’s Law. Modification of Laminate Constitutive Equations. Orthotropic Lamina C.T.E’s. C.T.E’s for special Laminate Configurations – Unidirectional, Off-axis, Symmetric Balanced Laminates, Zero C.T.E laminates, Thermally Quasi-Isotropic Laminates
UNIT V ANALYSIS OF LAMINATED FLAT PLATES 10
Equilibrium Equations of Motion. Energy Formulations. Static Bending Analysis. Buckling
Analysis. Free Vibrations – Natural Frequencies
TOTAL: 45 PERIODS
1. Gibson, R.F., Principles of Composite Material Mechanics, McGraw-Hill, 1994, Second Edition - CRC press in progress.
2. Hyer, M.W., “Stress Analysis of Fiber – Reinforced Composite Materials”, McGraw-
1. Issac M. Daniel and Ori Ishai, “Engineering Mechanics of Composite Materials”, Oxford University Press-2006, First Indian Edition - 2007
2. Mallick, P.K., Fiber –”Reinforced Composites: Materials, Manufacturing and Design”,
Maneel Dekker Inc, 1993.
3. Halpin, J.C., “Primer on Composite Materials, Analysis”, Techomic Publishing Co.,
4. Agarwal, B.D., and Broutman L.J., “Analysis and Performance of Fiber Composites”, John Wiley and Sons, New York, 1990.
5. Mallick, P.K. and Newman, S., (edition), “Composite Materials Technology:
Processes and Properties”, Hansen Publisher, Munish, 1990.