Machine Design
Teacher
Kula Bhusan Pradhan
Category
Core Courses
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Course Name : Machine Design
Code(Credit) : DIME0210(2-1-0)
Course Objectives
- Understanding the design procedure for a product with the factors governing it.
- Understanding the design of various mechanical elements.
- Understanding the different failures of design elements.
- Understanding the application of computer based techniques for design, simulation and analysis of various elements.
Learning Outcomes
Students will be able to:
- Demonstrate the machine design procedure.
- Use the design data hand book for solving numericals.
- Describe the design and failure of welded joints, riveted joints, shafts, keys, flat belts, springs and clutch.
- Design and analyze the nut and bolt, rivets, shaft, flat belt, springs and clutch using ANSYS software
Course Syllabus
MODULE I
Introduction: Introduction to Machine Design and Classify it.State the types of loads. Define working stress, yield stress, ultimate stress & factor of safety. State mechanical properties of the material. State the factors governing the design of machine elements. Describe the design procedure.
Design of fastening elements: Design of Screw thread (Nut and Bolt). State types of welded joints. State advantages of welded joints over other joints. Determine the strength of welded joints for eccentric loads. State types of riveted joints. Describe the failure of riveted joints. Determine the strength & efficiency of riveted joints. Design riveted joints for pressure vessels. Solving simple numerical on the above topics.
Practice and Demonstration:
- Demonstration of shaper machine and CNC machine and their working mechanism.
- Demonstration using rubber, plastic pen, springs used in pens and bulb.
- Design and analysis of nut and bolt using ANSYS software.
- Design and analysis of riveted joint using ANSYS software.
MODULE II
Design of shafts and Keys: State function of shafts. State materials for shafts. Design solid & hollow shafts to transmit a given power at given rpm based on a) Strength: (i) Shear stress, (ii) Combined bending & tension; b) Rigidity: (i) Angle of twist, (ii) Deflection, (iii) Modulus of rigidity. State function of keys, types of keys & material of keys. Describe the failure of the sunk key, the effect of the keyway. Design rectangular sunk key considering its failure against shear & crushing. Design rectangular sunk key by using empirical relation for a given diameter of the shaft. Solving simple numerical on the above topics.
Practice and Demonstration:
- Design and analysis of shaft using ANSYS software.
MODULE III
Design of belt drivers and pulleys: State types of belt drives & pulleys. State formula for the length of the open and crossed belt, the ratio of driving and driven side tension, centrifugal tension, the relation between centrifugal tension and tension on the tight side for maximum power transmission. Determine belt thickness and width for given permissible stress for open and crossed belt considering centrifugal tension. Design a cast iron (C.I) pulley using empirical formula only. Solving simple numerical on belt and pulley.
Design a closed coil helical spring and leaf spring: Materials used for helical spring. Terms used in compression spring. Stress in helical spring of a circular wire. End connection for helical tension spring. Deflection of helical spring of circular wire. Eccentric loading of spring. The surge in spring. Design of leaf spring. Construction of leaf spring. Nipping. Length of leaf spring. Solving simple numerical on the above topics.
Design of friction clutch: Clutch and its types. Friction clutches. Design of single plate and multiple plate clutch. Solving simple numerical on Clutch.
Practice and Demonstration:
- Design and analysis of helical spring using ANSYS software.
- Design and analysis of leaf spring using ANSYS software.
- Design and analysis of leaf spring using ANSYS software.
Learning Resources:
- A textbook of Machine Design by R.S. Khurmi & J.K. Gupta
Session Plan
Session 1
LECTURE:
Introduction to Machine Design and Classify it.
DEMO:
Demonstration of Shaper machine and CNC machine and their working mechanism
STUDY MATERIALS:
Video: Description of machine design and its classification
Session 2
LECTURE:
State the types of loads. Define working stress, yield stress, ultimate stress & factor of safety.
DEMO:
Demonstration using rubber, plastic pen and bulb.
STUDY MATERIALS:
Video:Different types of load considered in machine design
Working stress, yield stress, ultimate stress and Factor of Safety
Session 3
LECTURE:
State mechanical properties of the material.
DEMO:
Demonstration using rubber, plastic pen, springs used in pens and bulb.
STUDY MATERIALS:
Video: Mechanical properties of materials
Session 4
LECTURE:
State the factors governing the design of machine elements. Describe the design procedure.
STUDY MATERIALS:
Session 5
LECTURE:
Design of Screw thread (Nut and Bolt) and Solving simple numerical problems.
Use Of design data handbook.
Session 6
PRACTICE:
Design and analysis of Nut and Bolt using ANSYS Workbench
STUDY MATERIALS:
Video: Design and analysis of Nut and Bolt using ANSYS Workbench
Session 7
LECTURE:
State types of welded joints. State advantages of welded joints over other joints. Determine the strength of welded joints for eccentric loads.
STUDY MATERIALS:
Session 8
LECTURE:
Solving of numerical problems on Welded joint based upon eccentric loads.
STUDY MATERIALS:
Problem on Eccentrically loaded welded joints
Session 9
LECTURE:
State types of riveted joints. Describe the failure of riveted joints. Determine the strength & efficiency of riveted joints.
STUDY MATERIALS:
Video: Introduction to riveted joints
Session 10
LECTURE:
Design riveted joints for pressure vessels. Solving numerical problems on the riveted joint and pressure vessels.
STUDY MATERIALS:
Video: Numericals Design of Double Riveted Butt Joint
Video: Design of Boiler & Pressure Vessel Joints Using Rivets
Session 11
PRACTICE:
Design and analysis of riveted joint using ANSYS Workbench
STUDY MATERIALS:
Video: Riveted joint structural analysis using ANSYS
Session 12
LECTURE:
State function of shafts. State materials for shafts. Design solid & hollow shafts to transmit a given power at given rpm based on a) Strength: (i) Shear stress, (ii) Combined bending & tension
STUDY MATERIALS:
Video:Design of shaft subjected to twisting moment and bending moment
Session 13
LECTURE:
Solving numerical on the design of solid & hollow shafts to transmit a given power at given rpm based on a) Strength: (i) Shear stress, (ii) Combined bending & tension
PRACTICE:
Analysis of shaft using ANSYS Workbench.
STUDY MATERIALS:
Video:Problem on design of shaft based upon twisting and bending
Session 14
LECTURE:
Design solid & hollow shafts to transmit a given power at given rpm based on
Rigidity: (i) Angle of twist, (ii) Deflection, (iii) Modulus of rigidity
Solving Numerical of shafts based upon Rigidity.
Session 15
LECTURE:
State function of keys, types of keys & material of keys. Describe the failure of the sunk key, the effect of the keyway.
STUDY MATERIALS:
Session 16
LECTURE:
Numericals on the design of rectangular and square sunk key considering its failure against shear & crushing.
Design rectangular sunk key by using empirical relation for a given diameter of the shaft.
Session 17
LECTURE:
State types of belt drives & pulleys. State formula for length of open and crossed belt, ratio of driving and driven side tension, centrifugal tension, relation between centrifugal tension and tension on tight side for maximum power transmission.
STUDY MATERIALS:
Session 18
LECTURE:
Determine belt thickness and width for given permissible stress for open and crossed belt considering centrifugal tension.
Solving numerical problems.
STUDY MATERIALS:
Session 19
PRACTICE:
Design and analysis of belt drive using Solidworks and ANSYS
STUDY MATERIALS:
Video:Design a V belt and pulley assembly with motion analysis in solidworks.
Session 20
LECTURE:
Design a cast iron (C.I) pulley using empirical formula only.
Solving numerical problems on cast iron pulley
Session 21
LECTURE:
Materials used for helical spring. Terms used in compression spring. Stress in helical spring of a circular wire. End connection for helical tension spring. Deflection of helical spring of circular wire.
STUDY MATERIALS:
Design of helical springs
Session 22
LECTURE:
Eccentric loading of spring. Surge in spring.
Numerical problems on helical springs.
STUDY MATERIALS:
Spring design and problems
Session 23
PRACTICE:
Design and analysis of helical spring using ANSYS Workbench.
STUDY MATERIALS:
Session 24
LECTURE:
Design of leaf spring. Construction of leaf spring. Nipping. Length of leaf spring.
STUDY MATERIALS:
Session 25
LECTURE:
solving numerical problems on Leaf spring.
PRACTICE:
Design and analysis of leaf spring using ANSYS Workbench
STUDY MATERIALS:
Session 26
LECTURE:
Clutch and its types. Friction clutches. Design of Single plate and multiple plate clutch.
STUDY MATERIALS:
Session 27
LECTURE:
Solving numerical problems on clutch.
PRACTICE:
Structural analysis of clutch using ANSYS Worbench
STUDY MATERIALS:
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