WITH EFFECT FROM THE ACADEMIC YEAR 2011 - 2012

CE 251

STRENGTH OF MATERIALS - II

Instruction                                            4         Theory Periods per week

                                                             2         Drawing per week

Duration of University Examination    3         Hours

University Examination                       50       Marks

Sessional                                               25       Marks

UNIT-I

Deflections : Slope and deflections by the double integration method for cantilever and simple supported beams, and beams with overhangs carrying point loads,, uniformly distributed and varying load over entrie span. Moment area and conjugate beam methods.

UNIT-II

Propped Cantilevers : Cantilever beams on elastic and rigid props for point loads and uniformly distributed loads. Bending moment and shear force diagrams, and deflections.

Fixed Beams : Determination of shear force, bending moment, slope and deflection in fixed beams with and without sinking of supports for point loads, uniformly distributed loads, and uniformly varying load over enter span.

Continuous Beams : Determination of moments in continuous beams with and without sinking of supports by the theorem of three-moments; bending moment and shear force diagrams.

UNIT-III

Compound stresses and strains : Principal stresses. Ellipse of stress. Mohr's circle for biaxial stresses. Principal strains. Introduction to failure theories.

Torsion : Theory of torsion in solid and hallow circular shafts, shear stress, angle of twist, strength and striffness of shafts. Transmission of power. Combined torsion and bending with and without end thrust. Determination of principal stresses and maximum shear stress. Equivalent B.M. and T.M.

UNIT-IV

Strain Energy : Strain energy of resilence in determinate bars subjected to gradually applied loads and impact loads. Resilence of beams. Castigliano's theorem and its applications to beams. Theorem of reciprocal deflections.

Springs : Close and open coiled helical springs under axial load and axial twist carriage springs.

UNIT-V

Columns and Struts : Euler's theory. Tankine - Gordon's formula, straight line formula, effect of end condition, slenderness ratio, eccentrically loaded columns, and Secant and Perry's formulae.

Trusses : Tension coefficients method and applications to plane and space trusses.

Suggested Reading :

1. 1.D.S. Prakash Rao, Strength of Materials, A Practical Approach,

Universities Press, Hyderabad, 1999.

1. 2.D.S. Prakash Rao, Graphical Methods in Structural Analysis, Universities Press, Hyderabad, 1997.

1. 3.G.H. Ryder, Stength of Materials, Third Edition in SI units, Macmillan India Limited, Delhi, 2002.

1. 4.A.Pytel and F.L. Singer, Strength of Materials, Harper & Row, Fourth Editon, New York,