Machine Design Introduction Lacture - 1

 Syllabus

UNIT-I

Introduction

• Definition, Design requirements of machine elements, General design procedure,

Introduction to Design for Manufacturing, Interchangeability, Limits, Fits and

Tolerances, Standards in design, Selection of preferred sizes.

Engineering materials and their properties

• Classification, Mechanical properties, Ferrous and non-ferrous metals, Nonmetallic

materials, Indian Standards designation of carbon & alloy steels, Selection criteria

of materials.

UNIT-II

Design under Static Load

• Modes of failure, Factor of safety and basis of determination, Principal stresses,

Torsional and bending stresses, Principal stresses in design of machine element,

Theory of failure, Eccentric loading.

Design under Variable Loads

• Cyclic stresses, Fatigue and endurance limit, Factors affecting endurance limit,

Stress concentration factor, Stress concentration factor for machine components,

Notch sensitivity, Design for finite and infinite life, Soderberg, Goodman & Gerber

criteria.

UNIT-III

Design of Joints

• Design of threaded joints, Preload on the bolt, stiffness of bolt and members,

efficiency of joints; Design of weld joints, Specification of welds, weld design under

different loading conditions, Design of riveted joints.

Cotter and Knuckle Joint

• Types of cotter joints, Design of socket and spigot cotter joint, Gib and cotter joint,

Design of knuckle joint

UNIT-IV

Design of Shafts

• Cause of failure in shafts, Materials for shaft, Stresses in shafts, Design of shafts

subjected to twisting moment, bending moment and combined twisting and

bending moments, Shafts subjected to fatigue loads, Design for rigidity

Keys and Couplings

• Types of keys, splines, Selection of square & flat keys, Strength of sunk key,

Couplings-Design of rigid and flexible couplings

Text/Reference Books

Text Books

• Design of Machine Elements-V. B. Bhandari (Tata McGraw Hill)

• Mechanical Engineering Design – Joseph E. Shigley (McGraw Hill)

• Fundamentals of Machine Components Design – Juvinall (Wiley)

Reference Books

• Mechanical Design of Machine Components – Norton (Prentice 

Hall)

• Design of Machine Members - Alex Valance and VI Doughtie

(McGraw Hill)

• Machine design-M.F. Spott (Prentice Hall India)

• Machine Design-Maleev and Hartman (CBS)

• Machine design -Black & Adams (McGraw Hill)

• Machine Design-Sharma and Agrawal (S.K. Kataria & Sons)

Evaluation

• Minor Test

• Major Theory Examination

Attendance >75% (including medical emergencies)

• Tutorials: Solve and submit in each class

• Assignments: Solve later and submit it in the next 

class

Note:- Tutorial and Assignments to be submitted on 

A4 size papers.

Machine Design-I

Course category: Department Core (DC)

Pre-requisites: Mechanics of Solids (BME-14)

Course Outcomes: The students are expected to be able to

demonstrate the following knowledge, skills and attitudes after

completing this course

• The understanding of design of mechanical components/systems,

associated design parameters and standards, and knowledge of

engineering materials and their properties.

• The ability to design mechanical components under the static loads

and dynamic loads based on different criteria.

• The ability to design temporary and permanent joints such as

riveted, bolted and welded joints as well as design of cotter and

knuckle joints and its engineering applications.

• The knowledge of design of circular shafts under the combined

loadings, selection of keys, and design of rigid & flexible couplings.

Machine Design–I Lab

Note: Minimum Eight experiments are to be performed from the following. 

Students are advised to use design data book for the design. Drawing 

shall be made wherever necessary on small drawing sheets

1. Design of machine components subjected to steady loads

2. Design of machine components subjected combined steady and variable 

loads

3. Design of boiler riveted joint

4. Design of eccentrically loaded riveted joint

5. Design & drawing of Cotter joint

6. Design & drawing of Knuckle joint

7. Design of shaft for combined constant twisting and bending loads

8. Design of shaft subjected to fluctuating loads

9. Design and drawing of flanged type rigid coupling

10. Design and drawing of flexible coupling

UNIT-I

Introduction

• Definition,

• Design requirements of machine elements,

• General design procedure,

• Introduction to Design for Manufacturing,

• Interchangeability, Limits, Fits and Tolerances,

• Standards in design,

• Selection of preferred sizes.

Problem Solving and Machine Design

• The domain of problem solving is very large because in

addition to design, it includes solving problems in

diverse areas such as legal, medical, political and social.

• Similarly, the domain of design is also very wide spread

because it includes architectural design, engineering

design, fashion design and interior design.

• Similarly, engineering design would include design in

the disciplines of civil engineering, electrical

engineering, electronics engineering, instrumentation

and control engineering and mechanical engineering.

Problem Solving and Machine Design 

Mechanical engineering design has two important

streams:

• Machine design where the focus is the transfer of

motion and mechanical power.

• Energy conversion and transfer systems where

the focus is energy conversion, energy

generation, heat transfer, thermodynamics and

combustion.

Engineering Design

• Engineering design may be defined as the

iterative decision making activity to create a

plan or plans by which the available resources are

converted, preferably optimally, into

systems, processes or devices to perform the

desired functions and to meet human needs.

• “An iterative decision making process to conceive

and implement optimum systems to solve

society’s problems and needs.”

Mechanical Engineering Design

• If the end product of the engineering design can

be termed as mechanical then this may be

termed as Mechanical Engineering Design.

• “Mechanical Engineering Design is defined as

iterative decision making process to describe a

machine or mechanical system to perform

specific function with maximum economy and

efficiency by using scientific principles, technical

information, and imagination of the designer.”

                        Thanks for visit

                                ❤️❤️❤️