Institute of Space Technology
Lesson Plan
Form #
IST-F-32/04
Date of Issue 08-May-2014
CS No:
DPTT-SUBJECT-LP-Rev No
Page No.
1 of 5
DEPARTMENT & PROGRAM: Department of Aeronautics and Astronautics Engineering
COURSE CODE-COURSE NAME: AAE737 Mechanics of Composite Structures
CR: 3-0
COURSE DESCRIPTION:
Composite material and their constituents, Unidirectional composites behavior of laminated composite plates
under various loading conditions, classical lamination theory, effective stiffness properties of composites,
Constitutive description of laminated plates, Laminated plate theory, Edge effects in laminates, Nonlinear
theory of generally laminated plates, Governing equations in the Von Karman sense, Laminated plates with
moderately large deflections, Post buckling and nonlinear vibration of laminated plates, Failure theories and
experimental results for laminates.
PRE-REQUISITE:
CO-REQUISITE:
Mechanics of Materials
-
TEXT AND MATERIALS:
Textbook
1. Engineering Mechanics of Composite Materials by
Issac M. Daniel and Ori Ishai
Publisher: Oxford University Press, 2nd Edition
2. Analysis and Performance of Composite Materials by
Bhagwan D. Agarwal and Lawrence J. Broutman, 3rd Edition
3. Class Notes
References Material:
4. Fiber Reinforced Composites Material, Manufacturing and Design by
P.K. Mallick, 3rd Edition
CRC Press
5. Principles of Composite Materials by
Ronald F. Gibson, 2nd Edition
6. Strength and Life of Composites by
Stephan W. Tsai, Stanford University
RELEVANT PROGRAM LEARNING OUTCOME:
To accommodate the needs of practicing engineers in the design philosophy/ guidelines structural mechanics
and failure theories under mechanical and hygrothermal loads using mathematical, experimental and
computational techniques.
Institute of Space Technology
Lesson Plan
Form #
IST-F-32/04
Date of Issue 08-May-2014
CS No:
DPTT-SUBJECT-LP-Rev No
Page No.
2 of 5
COURSE LEARNING OUTCOMES:
This course presents methodical presentation of the underlying concepts regarding structural mechanics,
failure theories, performance, development and design guidelines. This will enable the students to determine
the in-service stresses in the plies of composite structural components under aerodynamic forces, moments in
different operational environments. The students will be able to design and predict its failure response. This
course will enable the students to design the composite structural component through of materials, number of
plies, ply orientation and stacking sequence to permit their efficient use in engineering industries.
PRACTICAL APPLICATIONS:
Advanced Composite Materials are increasingly being used in engineering industries due to their superior
physical and mechanical properties. However their anisotropic and non-homogeneous nature makes it
extremely difficult to design the composite structure for given application. The poor analysis and design of
composite structure impairs the structural integrity, flight reliability and mission performance. This course
leads to effective design and development of structural components in aerospace, automotive, marine, sports
goods and other industries.
LECTURE PLAN:
Instruction
Discussion
Exercises/Tutorial
On-line/ recorded video lectures:
Module
I.
II.
75%
5%
10%
10%
Topic
COMPOSITE MATERIALAS AND
CONSTITUENTS
1.1. Definition, advantages and characteristics
1.2. Historical perspective/developments
1.3. Properties of carbon, Kevlar and glass fiber
1.4. Properties of Thermoset/Thermoplastic
matrices
1.5. Applications in Aerospace, Space, automotive,
marine, sports industries
UNIDIRECTIONAL COMPOSITES BEHAVIORRR
2.1.
Stress-Strain Relation
2.2.
Elastic constants
Reference
1,3
1,3
Week
1
2
Institute of Space Technology
Lesson Plan
2.3.
2.4.
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Date of Issue 08-May-2014
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Transformation of stress-strain
Micromechanical Prediction
III.
CLASSICAL LAMINATE THEORY
3.1.
The Symmetric Laminate with a plane load
3.2.
The Symmetric Laminate with bending and
twisting loads
3.3.
The Symmetric Laminate with both in plane
and bending loads
3.4.
The Unsymmetric Laminate with both in
plane and bending loads
3.5.
Effective Stiffness properties of Composites
1,2,3
IV.
HYGRO-THERMAL EFFECTS
4.1.
Hydrothermal effects on mechanical
behavior
4.2.
Coefficients of thermal and moisture
absorption
4.3.
Influence on stress-strain relation
4.4.
Phsical significance during manufacturing
and service
4.5.
Interlaminar Laminar stresses (Edge Effects)
1,2.3
1,2,3,4
V.
*VI.
3,4
5,6
7,8
FAILURE ANALYSIS
5.1.
Failure Mechanisms under uniaxial and
biaxial loading
5.2.
Maximum stress-strain theory
5.3.
Deviatoric strain theory
5.4.
Interactive strain polynomial theory
5.5.
Micromechanics of first play/ progressive/
ultimate failures
COMPUTATIONAL DESIGN AND ANALYSIS
OF COMPOSITES
6.1.
Mic-Mach, In-plane, Flex, Duplex,
Progressive Damage
6.2.
Wind mill blade design
6.3.
Composite Design using
NASTRAN/PATRAN
6.4
Composite Design using ANSYS
1,6
9,10
Institute of Space Technology
Lesson Plan
*VII.
VIII.
*IX
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Date of Issue 08-May-2014
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LAMINATE DESIGN CONSIDERATION
7.1.
Design philosophy, criteria and allowables
7.2.
General design guidelines, allowables/ data
and best practices in design
7.3.
Composites Performance Envelopes
7.4.
Design problem in space station, aircraft
and automobile industries.
11,12
CONSTITUTIVE DESCRIPTION OF
LAMINATED PLATES
7.5. Governing equation in Von Karman Sense
7.6.
Laminated Plate with moderately large
deflection
7.7.
Buckling and Post buckling of laminated
plates
7.8.
Vibrations of laminated plates
13, 14
EXPERIMENTAL STRESS ANALYSIS OF
COMPOSITE
8.1. Tensile Properties
8.2.
Compressive Properties
8.3.
Flexture Properties
8.4.
Shear Properties
8.5.
Digital Image Correlation
15
16
Final Examination
COURSE TARGETS:
Module
Assessment
CLO No.
Teaching Methodology
Learning Domain with L
No.
Methodology
Thin Laminate Web assisted, power point lectures
Quizzes
I
Composites supplemented with blackboard;
Theory.
http://www.ist.edu.pk/amss/courses/lecturers One Hour Test
II
Composites
Design data,
performance
On line/ recorded video conference from
Stanford University, Victoria University,
Boeing Commercial Aircraft Limited.
Home
assignments/
mini projects
Institute of Space Technology
Lesson Plan
III
envelope and
guidelines
Classroom interactive discussion,
Computational comments.
and
experimental
Testing for
Composites
Design
ASSESMENT:
Quizzes
Assignments/ mini projects
OHT Exam
Final Exam
Form #
IST-F-32/04
Date of Issue 08-May-2014
CS No:
DPTT-SUBJECT-LP-Rev No
Page No.
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End term exam
10
10
40
40
______________________________________________________
Total
100%
Note: Sections VI, VII and IX (shown in */ italic constituting about 30% of course work
about design, computational and experimental analysis of composites) is in addition to the
minimal requirement of the IST course description, AAE737
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