Faculty of
Engineering and Applied Science Special Topics ENG 9925 Theory
& Design of Mech. Comp. & Structures 
Office: EN 3044 (S.J. Carew Bldg.) 
Dr. Seshu M.R. Adluri 

Lectures: 9:0010:30 a.m. Tues &Thurs 
Significance and Rationale: 
Components such as
cylinders, spheres, pipes, storage tanks, etc., are very common in several
industries. At present, the design is
mainly by empirical methods based in part on simplified formulas. Design by analysis is not practiced much
and is not well understood by practitioners.
Rational design of components requires a good understanding of
theories of beams, plates and shells, failures theories, different types of
stress, stress classification, limit analysis, and many associated concepts
such as hot spots, corrosion, remaining strength, etc. The material covered in
the present course, is a continuation or extension of several topics covered
in solid mechanics courses at undergraduate and graduate level. It has long been observed that while the
students learn powerful techniques such as the finite element method, they
are sorely lacking in fundamental understanding of the behaviour of
components. Many have also forgotten
the proper use of the material from the under graduate courses. It is hoped that with this course, we will
introduce the students to advanced topics within the solid mechanics area
while also quickly reviewing the material that they should have learned to use
intelligently. While the course ENG 9520
is an introduction to the theory of elasticity, the present course includes
topics that are generally not included in that course. The approach is also somewhat different. The topics may include
pressure vessels, introduction to plates & shells, curved beams, thin‑walled
members, torsion, buckling, plastic collapse loads for beams and plates,
plasticity, etc. The students are expected
to have a good understanding of undergraduate concepts in solid mechanics
(although a quick review is provided), and differential equations as well as
some understanding of numerical techniques.
The course is intended to familiarize the students with the
fundamental concepts, development of governing equations, their solution to
standard cases, and special application areas. The students usually learn the basics in
undergraduate courses on Mechanics of Solids and design of components and
structures. Some advanced courses on
graduate level Elasticity, Finite Elements, Dynamics, etc., normally skip
over a vast number of practical applications. This course aims at filling this gap. As such the course is a combination of
“Advanced Strength of Materials” and related design issues. This course should be of
interest to Mechanical, Civil and Naval disciplines. It has applications for power generation
industry, chemical & petrochemical industries, pulp & paper industry
and the entire range of structural engineering,. It may be of interest to practicing
engineers as well as graduate students.


Course Outline:
Basics 

1a. 
Short introduction and
review of mechanics of solids. May
include brief review of tensors, fundamental equations of deformable bodies, stress‑strain
and compatibility equations, multiaxial stresses 
1b. 
Review of failure theories
and other solid mechanics concepts such as factors of safety 
1c. 
Code provisions, design by
analysis, loading, etc. 
Introduction
to the theory of Plates 

2a. 
Plates loaded in their
plane. Governing equations and
solutions 
2b. 
Fundamental equations of
Plate bending 
2c. 
Classical Solutions to plates
with regular loading Rectangular and Circular
plates 
2d. 
Engineering Applications 
Special
Topics in Plates 

3a. 
Introduction to plates
with holes and other special considerations 
3b. 
Approximate and numerical solutions
for plates 
Introduction
to the theory of Shells 

4a. 
Thin cylindrical shells 
4b. 
Membrane theory of shells 
4c. 
Applications of the
membrane theory 
4d. 
Bending theory of shells 
4e. 
Beams on elastic
foundation 
4f. 
Applications for shallow
shells 
4g. 
Thermal and residual
stresses 
4h. 
Applications: spherical, torispherical,
ellipsoidal and conical shells 
Theory
of Thick Cylinders 

5a. 
Basic relationships 
5b. 
Stress components and
displacements 
5c. 
Partial or fully plastic
cylinders, Failure 
5d. 
Residual stresses and Autofrettage 
5e 
Temperature effects 
5f 
Rotating discs 
Limit
Analysis 

6a. 
Background –limit
theorems, beam limit loads, flow rules 
6b. 
Shake down, Melan’s theorem 
6c. 
Limit loads for plates 
6d. 
Limit loads for shells 
Special
Topics in Shells 

7a. 
Stress concentration,
discontinuity, triaxiality, fatigue 
7b. 
Notches, reinforcement
around openings 
7c. 
Rational design concepts,
levels of stress, critique of code based methods 
7d. 
Engineering applications 
FitnessforService 

8a. 
Introduction to Remaining
strength factors and Level 2 methods 
8b. 
Corrosion in cylinders and
spherical shells 
8c. 
Hotspots in shells 
Assessment
Procedure:
Course projects 
25% 
Midterm Examination 
30% 
Final Examination 
45% 
References:
ASME, 1998. Boiler
and Pressure Vessel Code, Section VIII, Div. 2
Boresi,
A.P. and Richard J. Schmidt, 2003. Advanced
Strength of Materials, 6^{th} Ed., John Wiley & Sons, Inc.
Burgreen, R. 1975. Design Methods
for Power Plant Structures, C.P. Press
Cook, R.D. and Warren C. Young, 1999. Advanced Mechanics of Materials,
2nd Ed., Macmillan Publishing Co.
Donnell, L.H., 1976. Beams, Plates and Shells, McGrawHill
Flugge,
W., 1990. Stresses in Shells, Springer
Jaeger,
L.G. Elementary Theory of Elastic Plates,
Pergamon Press
Jawad, M. & Farr, J.
1989. Structural Analysis and
Design of Process Equipment, Wiley & Sons.
Salvadori,
M.G. and M.L. Baron, 1967. Numerical Methods in Engineering,
PrenticeHall
Seshadri,
R. Class Notes on Pressure Component Design, MUN
Seshadri
R. and Shaw, W.J. 1990. Pressure Vessel Design, 3day short
course notes.
Szilard, R. 1974. Theory and Analysis of
PlatesClassical and Numerical Methods, Prentice Hall.
Timoshenko,
S.P. and S. Woinowsky‑Krieger, 1970. “Theory Plates and Shells,” McGrawHill
Legal stuff: 
The MUN Faculty Association asked us to
include the following in Legalese. J So there! J The lectures and displays (and all material) delivered or provided in this course, including any visual or audio recording thereof, are subject to copyright owned by the instructor for the course (Dr. Seshu Adluri). Other copyrights may also be applicable. It is prohibited to record or copy by any means, in any format, openly or surreptitiously, in whole or in part, in the absence of express written permission from the instructor, Dr. Seshu Adluri any of the lectures, materials provided or published in any form during or from the above course. 