# NIT Jalandhar III SEM

NIT Jalandhar – Civil Engineering Syllabus

CE 211 Strength of Materials [3 1 0 4]

Simple stresses and strains: Concept of stress and strain: St. Venants principle of stress and

strain diagram, Hooke’s law, Young’s modulus, Poisson ratio, stress at a point, stresses and
strains in bars subjected to axial loading, Modulus of elasticity, stress produced in compound bars
subject to axial loading, Temperature stress and strain calculations due to applications of axial
loads and variation of temperature in single and compound walls.
Compound stresses and strains: Two dimensional system, stress at a point on a plane,
principal stresses and principal planes, Mohr’s circle of stress, ellipse of stress and their
applications, Two dimensional stress-strain system, principal strains and principal axis of strain,
circle of strain and ellipse of strain, Relationship between elastic constants.
Bending moment and shear force diagrams: Bending moment and shear force diagrams, S F
and B M definitions. BM and SF diagrams for cantilevers, Simply supported and fixed beams with
or without overhangs and calculation of maximum BM and SF and the point of contraflexure
under: Concentrated loads, Uniformly distributed loads over the whole span or part of span,
combination of concentrated loads (two or three) and uniformly distributed loads, uniformly
Theory of bending stresses: Assumptions in the simple bending theory, derivation of formula:
its application to beams of rectangular, circular and channel sections, composite/fletched beams,
bending and shear stresses in composite beams.
Torsion: Derivation of torsion equation and its assumptions. Applications of the equation of the
hollow and solid circular shafts torsional rigidity, combined torsion and bending of circular shafts
principal stress and maximum shear stresses under combined loading of bending and torsion,
analysis of close-coiled-helical springs.
Thin cylinders and spheres: Derivation of formulae and calculations of hoop stress longitudinal
stress in a cylinder, and sphere subjected to internal pressures increase in Diameter and volume.
Columns and struts: Columns under uni-axial load, Buckling of Columns, Slenderness ratio and
conditions. Derivations of Euler’s formula for elastic buckling load, equivalent length, Rankine
Gordon’s empirical formula.
Strain energy: Energy of dilation and distortion, resilience stress due to suddenly applied loads,
Castigliano’s theorem, Maxwell’s theorem of reciprocal deflection.
Theories of Failure: Maximum principal stress theory, maximum shear stress, theory, maximum
strain energy theory, maximum shear strain energy theory, graphical representation and
derivation of equation for each and their application to problems relating to two dimensional stress systems only.
Books Recommended:
1. Pytel A H and Singer F L, “Strength of Materials”, 4th Edition, Harper Collins, New Delhi,
1987.
2. Beer P F and Johnston (Jr) E R, “Mechanics of Materials” SI Version, Tata McGraw Hill,
India, 2001.
3. Timoshenko S P and Young D H, “Elements of Strength of Materials”, 5th Edition, East
West Press, New Dlehi, 1984.