LECTURE NO. 28 to 30
STATE OF STRESSES CAUSED BY COMBINED LOADS
Objectives:
To explain the procedure for establishing the
resultant normal and shear stress components at
a point in a member subjected to several different
types of loading simultaneously
P

LECTURE NO. 9 & 10
DEFORMATION OF AXIALLY LOADED MEMBERS AND
PRINCIPLE OF SUPERPOSITION
Objectives:
To explain how to determine deformation of
axially loaded members
To explain the "principle of superposition"
DEFORMATION OF AXIALLY LOADED MEMBERS
(i) V

LECTURE NO. 35 to 38
SLOPE AND DEFLECTION OF BEAMS, AND
STATICALLY INDETERMINATE BEAMS
Objectives:
To explain the "elastic curve" of a beam, which
characterizes the slope and deflection along the length of
the beam
To explain the "moment-curvature relat

LECTURE NO. 33 & 34
TRANSFORMATION OF PLANE-STRESS COMPONENTS
USING MOHRS CIRCLE
Objectives:
To explain the procedure for constructing the
Mohr's Circle to be used for transformation of the
plane stress components
To explain, using constructed Mohr's ci

LECTURE NO. 31 & 32
TRANSFORMATION OF PLANE-STRESS COMPONENTS
PRINCIPAL NORMAL STRESSES & MAX. SHEAR STRESS
Objectives:
To define the state of plane-stress
To explain how to transform the plane-stress
components from one orientation of an element
to an

LECTURE NO. 27
STRESSES IN THIN-WALLED PRESSURE VESSELS
Objectives:
To define a thin-walled vessel
To explain the expressions for stresses
developing in thin-walled cylindrical and spherical
vessels
THIN-WALLED PRESSURE VESSELS
A vessel having an inner

LECTURE NO. 26
SHEAR FLOW IN BUILT-UP MEMBERS
Objectives:
To explain the "shear flow (q)" along a
longitudinal axis of a beam, to which the
fasteners (e.g., nails, bolts, welds) or glue are
subjected while holding the components of a
built-up section tog

LECTURE NO. 25
SHEAR STRESS IN BEAMS
Objectives:
To explain the expressions for shear stress () in
beams with rectangular and flanged sections
To show the variations of along the depth of the
beams having rectangular and flanged sections
To explain the

LECTURE NO. 24
SHEAR IN STRAIGHT BEAMS, SHEAR FORMULA
Objectives:
To explain shear stress development and
resulting deformation in the straight members
To explain the "shear formula" for calculating the
shear stress in the member
SHEAR IN STRAIGHT MEMBE

LECTURE NO. 11 & 12
STATICALLY INDETERMINATE
AXIALLY LOADED MEMBERS
Objectives:
To explain what is a statically indeterminate
axially loaded member
To explain the "procedure of analysis" of a
statically
indeterminate
axially
loaded
member using compatib

LECTURE NO. 13 & 14
THERMAL STRESS AND THERMAL STRAIN
Objectives:
To explain how to determine the
expansion or contraction in a member
subjected to change in temperature
To explain how to calculate the thermal
stress and thermal strain
EXPANSION OR CONT

LECTURE NO. 24
TWISTING OF THIN-WALLED CLOSED SECTIONS
Objectives:
To explain the "shear flow", "average
shear stress", and angle of twist in thinwalled sections subjected to torque
THIN-WALLED TUBES HAVING CLOSED CROSS-SECTIONS
Shear Flow (q):
Let us co

LECTURE NO. 23
TORSION OF SOLID NONCIRCULAR SHAFTS
Objectives:
To explain the deformation and stress
behavior of the solid non-circular shafts
subjected to torque
To explain the expression for max and for
different shapes of shaft's cross-section
DEFORM

LECTURE NO. 22
STATICALLY INDETERMINATE SHAFTS
Objectives:
To explain how to analyze the problems
related to the statically indeterminate
shafts subjected to torques
ANALYSIS OF STATICALLY INDETERMINATE
TORQUE-LOADED SHAFTS
Let us consider a shaft fixed

LECTURE NO. 20 & 21
ANGLE OF TWIST
Objectives:
To explain the formula for determining the
"angle of twist ()" of one end of a shaft
with respect to its other end
ANGLE OF TWIST ()
(i) Varying Torque and Cross-Sectional Area:
T x
we have d
and
GJ x
dx

LECTURE NO. 19
POWER TRANSMISSION THROUGH SHAFTS & GEARS
Objectives:
To explain the "power
through shafts and gears
transmission"
POWER TRANSMISSION THROUGH
SHAFTS AND GEARS
Shafts, tubes, and gears having circular crosssections are often used to transm

LECTURE NO. 18
TORSION OF CIRCULAR SHAFTS
Objectives:
To explain the "torque" and "torsional
deformation" of a circular shaft
To explain the "torsional formula" for
shear stress developing in a circular shaft
under torsional effect
TORQUE (T)
"Torque"

LECTURE NO. 16 & 17
STRESS COMPONENTS UNDER GENERAL LOADING,
MATERIAL-PROPERTY RELATIONSHIP
Objectives:
To show the normal and shear stress
components existing on each face of an
element of a body subjected to general
loading
To explain the generalized

LECTURE NO. 15
STRESS CONCENTRATIONS
Objectives:
To
explain
the
concept
of
"stress
concentration"
To explain how to make use of the "stressconcentration factor" for design and analysis
of members with stress concentrations
STRESS CONCENTRATIONS
Stress c

LECTURE NO. 22 & 23
THE FLEXURE FORMULA
Objectives:
To explain the "flexure formula" for calculating
the normal stress () at a point at some distance
(y) from NA on the cross-sectional area of a
member subjected to M
THE FLEXURE FORMULA
The variation of

LECTURE NO. 21
BENDING DEFORMATION OF STRAIGHT BEAMS
Objectives:
To explain how a straight beam deforms when it
is subjected to bending moment
To explain the assumptions made regarding the
deformation of straight beams
To derive the expression for norm

LECTURE NO. 20
SHEAR AND BENDING MOMENT DIAGRAMS:
Graphical Method
Objectives:
To explain how to draw the shear and bending
moment diagrams using the "graphical method"
GRAPHICAL METHOD OF CONSTRUCTING SHEAR
AND MOMENT DIAGRAMS
Graphical method for cons

LECTURE NO. 8
STATICALLY INDETERMINATE
AXIALLY LOADED MEMBERS
Objectives:
To explain what is a statically indeterminate
axially loaded member
To explain the "procedure of analysis" of a
statically
indeterminate
axially
loaded
member using compatibility

LECTURE NO. 7
DEFORMATION OF AXIALLY LOADED MEMBERS AND
PRINCIPLE OF SUPERPOSITION
Objectives:
To explain how to determine deformation of
axially loaded members
To explain the "principle of superposition"
DEFORMATION OF AXIALLY LOADED MEMBERS
(i) Varyin

LECTURE NO. 6
MATERIAL BEHAVIOR, HOOKES LAW,
POISSONS RATIO AND - DIAGRAM
Objectives:
To explain the stress-strain behavior of ductile
and brittle materials
To explain the Hooke's law and modulus of
elasticity of a material
To explain the Poisson's rat

LECTURE NO. 5
STRAIN, STRESS-STRAIN DIAGRAMS
Objectives:
To explain the concept of normal and shear
strains
To explain the tension and compression test on
specimen of a material
To explain various features of the stress-strain
diagrams
DEFORMATION
Def

LECTURE NO. 4
ALLOWABLE STRESS AND
INTRODUCTION TO DESIGN
Objectives:
To explain the concept of allowable stress,
factor of safety, and design of simple
connections or mechanical elements
ALLOWABLE STRESSES (allow and allow)
AND FACTOR OF SAFETY (F.S.)
"

LECTURE NO. 3
AVERAGE SHEAR STRESS AND BEARING STRESS
Objectives:
To explain the concept of average shear stress
and types of shear, e.g.:
direct shear
single shear and double shear
punching shear
induced shear
indirect shear, and
pure shear
To explain

LECTURE NO. 2
STRESS, NORMAL STRESS
Objectives:
To explain the concepts of the stress
and average normal stress
DEFINITION OF STRESS
Considering a small force F acting on its
associated area A, as shown in the following
figure:
Fx acting tangent to A,
a

STRUCTURAL MECHANICS-I
CE 203
Instructor:
Shamshad Ahmad (Ph.D., IIT Delhi)
Associate Professor
Civil Engineering Department
KFUPM, Dhahran
Saudi Arabia
LECTURE NO. 1
INTRODUCTION, EQUILIBRIUM
Objectives:
To explain the concepts of the Mechanics of
Mater