ME25C06 Design of Machine Elements – Semester IV – IEM / Mechatronics – R-2025

Subject Code & Name: ME25C06 – Design of Machine Elements

Regulation: R-2025

Semester: IV (Fourth Semester)

Branch: B.E. Industrial Engineering and Management (IEM) / B.E. Mechatronics Engineering (Mechatronics)

Credits / L-T-P: 3 Credits | L-T-P: 3-0-0

Course Objectives

• To provide fundamental knowledge of machine element design by enabling students to understand design principles, material selection, stress analysis, and standard practices, and to apply these concepts in designing mechanical components such as shafts, joints, springs, and bearings to meet functional and strength requirements.

Full Unit-wise Syllabus

Unit I – Steady Stresses and Variable Stresses in Machine Members

Introduction to the design process, factors influencing machine design, selection of materials based on mechanical properties, Preferred numbers, fits and tolerances, Direct, Bending and torsional stress equations, Impact and shock loading, calculation of principle stresses for various load combinations, eccentric loading, curved beams, crane hook and ‘C’ frame, Factor of safety, theories of failure, Design based on strength and stiffness, stress concentration, Design for variable loading.

Activities: Analyze a machine component under combined loading and determine stresses and factor of safety.

Unit II – Shafts and Couplings

Design of solid and hollow shafts based on strength, rigidity and critical speed, Keys, keyways and splines, Rigid and flexible couplings.

Activities: Design a shaft and select a suitable coupling based on strength and rigidity requirements.

Unit III – Temporary and Permanent Joints

Threaded fastners, Bolted joints including eccentric loading, Knuckle joints, Cotter joints, Welded joints.

Activities: Design a bolted or welded joint for given loading conditions and evaluate its safety.

Unit IV – Energy Storing Elements

Types of springs, design of helical and concentric springs–Surge in springs, Design of laminated springs. Flywheels considering stresses in rims and arms for engines and presses - Solid and Rimmed flywheels.

Activities: Design a helical spring or flywheel based on given load and energy requirements.

Unit V – Engine Components

Design of Piston, Connecting Rods and Crank shafts.

Activities: Perform basic design calculations for piston or connecting rod under operating conditions.

Unit VI – Bearings

Sliding contact and rolling contact bearings, Hydrodynamic journal bearings, Sommerfeld Number, Raimondi and Boyd graphs, Selection of Rolling Contact bearings.

Activities: Select a suitable bearing and analyze its performance for given load and speed conditions.

Course Outcomes (COs)

• CO1: Explain the fundamental concepts of machine design including stress analysis, material selection, theories of failure, and standard design practices.
• CO2: Apply design principles to calculate stresses, dimensions, and safety factors for machine elements under static and variable loading conditions.
• CO3: Analyze machine elements such as shafts, joints, springs, and bearings under different loading conditions to determine performance and reliability.
• CO4: Evaluate the suitability of different machine elements and design alternatives considering strength, stiffness, safety, and standard practices.

Assessment Pattern (Quick Note)

• Weightage: Continuous Assessment 40% | End Semester Examinations 60%
• Internal methodology: Quiz (5%), Assignments (25%), Review of GATE/ESE Questions (20%), Internal Examinations (50%)

Source: Official Anna University – B.E. Industrial Engineering and Management R-2025 Syllabus
Last Updated: October 2026