WITH EFFECT FROM THE ACADEMIC YEAR 2011 - 2012
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 arid 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.
7 8
Direct and bending stresses: 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 Reading :
- 1.D. S. Prakash Rao, Strength of Materials A Practical Approach, Universities Press, Hyderabad, 1999.
- 2.G H. Ryder, Strength of Materials, Third Edition in SI units, Macmillan India Limited, Delhi, 2002.
- 3.S. Ramamrutham, Strength of Materials, Dhanpat Rai & Sons, 1993.
- 4.S. S. Bhavakatti, Strength of Materials, Vikas Publications, 2003
- 5.B. C. Punmia, Strength of Materials and Theory of Structures, Laxmi Publications,