Subject Code & Name: CE25C11 – Strength of Materials
Regulation: R-2025
Semester: III (Third Semester)
Branch: B.E. Mechanical Engineering (Mech) / B.E. Aeronautical Engineering (Aero) / B.E. Automobile Engineering (Auto) / B.E. Manufacturing Engineering (Mfg) / B.E. Industrial Engineering and Management (IEM) / B.E. Marine Engineering (Marine) / B.E. Mechanical and Automation Engineering (MechAuto) / B.E. Robotics and Automation (Robotics) / B.E. Aerospace Engineering (Aerospace)
Credits / L-T-P: 4 Credits | L-T-P: 3-0-2
Course Objectives
- To understand the behaviour of materials under different loading conditions and analyze stresses, strains, bending, torsion, deflection, columns, and pressure vessels.
Full Unit-wise Syllabus
Unit I – Stress, Strain and Deformation of Solids
Rigid bodies and deformable solids, Tension, Compression and Shear Stresses, Deformation of simple and compound bars, Thermal stresses, Elastic constants, Volumetric strains, Stresses on inclined planes, Principal stresses and principal planes, Mohr’s circle of stress.
Activities: Assignments and Quiz problems on stress, strain and deformation of solids. Practical 1. Tensile test on mild steel rod. 2. Hardness test on metals (Rockwell and Brinell Hardness Tests)
Unit II – Transverse Loading on Beams and Stresses In Beam
Beams, Types, Transverse loading on beams, Shear force and Bending moment in beams, Cantilever, Simply-supported and over-hanging beams. Theory of simple bending Bending stress distribution, Load carrying capacity, Proportioning of sections, Flitched beams, Shear stress distribution.
Activities: Demonstration of practical applications of transverse loading on beams, Simulation of Shear Force and Bending Moment Diagrams using web- based analysis tools. Practical 1. Double shear tests on metal rod 2. Impact test on metal specimen (Izod and Charpy)
Unit III – Torsion
Theory of Torsion, Stresses and Deformations in Solid and Hollow Circular Shafts, Combined bending moment and torsion of shafts, Power transmitted to shaft, Shaft in series and parallel, Closed and Open Coiled helical springs – springs in series and parallel.
Practical: Torsion test on mild steel rod.
Activities: Assignments on torsion of solid and hollow circular shafts.
Unit IV – Deflection of Beams and Springs
Elastic curve, Governing differential equation, Double integration method, Macaulay's method, Area moment method, Conjugate beam method for computation of slope and deflection of determinant beams, Strain energy method for determinate beams, Maxwell’s reciprocal theorem, Leaf springs. Practical 1. Deflection test on metal beam. Verification of Maxwell’s reciprocal theorem. 2. Deflection test on carriage spring.
Unit V – Columns and Struts
Introduction, Classification of columns, Axially loaded compression members, Euler’s crippling load theory, Derivation of Euler’s critical load formulae for various end conditions, Equivalent length, Slenderness ratio, Euler’s critical stress, Limitations of Euler’s theory, Rankine, Gordon formula, Eccentric loading and Secant formula, Prof. Perry’s formula.
Practical: Compression test on wood and brick.
Activities: Model making of light weight bridge.
Unit VI – Thin Cylinders, Spheres and Thick Cylinders
Stresses in thin cylindrical shell due to internal pressure, circumferential and longitudinal stresses, Deformation in thin cylinders, Spherical shells subjected to internal pressure, Deformation in spherical shells, Thick cylinders, Lame’s theory.
Activities: Assignments and Quiz problems on Thin Cylinders, Sphere and Thick Cylinders. Tasks T1. Design a crane beam used in construction to safely carry heavy loads, considering bending stress and shear force. T2. Design a transmission shaft for an automobile to transmit required power without failure under torsion and combined loading. T3. Design a vehicle suspension spring (helical spring) to absorb shocks and provide required comfort based on load and deflection criteria. T4. Design a building column (steel or concrete) to safely support axial loads, considering buckling and stability conditions.
Course Outcomes (COs)
- CO1: Describe fundamental concepts of stress, strain deformation, bending, torsion, deflection, columns and pressure vessels to demonstrate overall understanding of strength of materials.
- CO2: Calculate stresses, strains, deformation, shear force bending moment, and load carrying capacity of structural members using relevant theories.
- CO3: Analyze beams, shafts, springs, and columns under various loading conditions to determine stress distribution and structural response.
- CO4: Evaluate strength, stability, and performance of structural components and develop suitable solutions for engineering applications involving deformation and failure analysis.
Assessment Pattern (Quick Note)
- Weightage: Continuous Assessment 50% | End Semester Examinations 50%
- Internal methodology: Written Test (40%), Practical (30%), Activity (30%). Practical: Lab Experiments (50%), Tasks (50%) (Each student must complete a minimum of two tasks). Activity: Review of GATE/ESE Questions (10%), Mini Project/ Quiz/ Assignment Programs/ Flipped Class /Seminar Presentation (20%)
Source: Official Anna University – B.E. Mechanical Engineering R-2025 Syllabus
Last Updated: September 2026
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