WITH EFFECT FROM THE ACADEMIC YEAR 2010 - 2011

CE 221

MECHANICS OF MATERIALS

Instruction                                                                                              4 Periods per week

Duration of University Examination                                                      3 Hours

University Examination                                                                        75 Marks

Sessional                                                                                               25 Marks

UNIT-I

Stresses and Strains:  Definitions, types of stresses and strains.  Elasticity and plasticity.  Hooke’s law.  Stress-Strain diagrams for engineering materials.  Modulus of elasticity.  Poisson’s ratio.  Relationship between elastic constants.  Linear and volumetric strains.  Bars of uniform strength.  Temperature stresses.  Compound bars.

UNIT-II

Shear Force and Bending Moment:  Bending moment and shear force diagrams for cantilever, simply supported beams and beams with overhangs.  Relationship between intensity of loading, shear force and bending moment. Simple theory of bending.  Moment of resistance.  Modulus of section.  Flitched beams.

UNIT-III

Deflections:  Slope and deflections by the method of double integration in cantilever, simply supported beams and beams with overhangs subjected to point loads and uniformly distributed loads.

Torsion:  Derivation of torsion formula for circular sections.  Torsional stresses, angle of twist, power transmission, effect of combined bending and torsion.  Close coiled and laminated springs.

UNIT-IV

Shear Stresses in Beams:  Distribution of Shear stresses in rectangular, I-and T-standard steel and hollow sections.  Compound stresses, principal stresses and strains.  Mohr’s circle of stress.

UNIT-V

Cylinders:  Stresses in thin and thick cylinders with internal and external pressures.  Hoop and longitudinal stresses.  Stresses in compound cylinders. 

Direct and bending Struts:  Core of rectangular, circular, I- and T- sections.

Columns and Struts:  Euler and Rankine formulae for axial load applications.  Secant and Perry formulae for eccentrically loaded columns. 

Suggested Readings

1. 1.D.S. Prakash Rao, Strength of Materials_ A Practical Approach, Universities Press, Hyderabad, 1999.
2. 2.G.H. Ryder, Strength of Materials, 3^rd Edition in SI units, Macmillan India Limited, Delhi, 2002.
3. 3.S, Ramamrutham, Strength of Materials, Dhanpat Rai & Sons, 1993.
4. 4.S.S. Bhavakatti, Strength of Materials, Vikas Publications, 2003.
5. 5.B.C.. Punmia, Strength of Materials and theory of Structures,  Laxmi Publications, 1992.