ME2030 COMPOSITE MATERIALS L T P C
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3
OBJECTIVES:
· 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
TEXT BOOKS:
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-
Hill, 1998
REFERENCES:
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.,
1984.
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.
By Vinoth
