Engineering Design II
 
 
Subject Code: EME2026
Aim of Subject: To expose the students to system design and to the use of a CAD software.
Learning Outcome of Subject: At the completion of the subject, students should be able to :
  • Understand the various terms and definitions for different types of mechanical springs and their applications. Select materials and apply the basic fundamentals to calculate stresses, deflection, and stability.
  • Learn about thread forms, Terminology, and standard of threads. Understand the principal of operations and selection. Apply the basic knowledge to design power screws. Knowing the different types of threaded fasteners and perform stress analysis of bolted joints.
  • Understand the principal of operation, classifications and selection of couplings, clutches, brakes, belts.
  • Understand the geometry, nomenclatures, and selection of various types of gears. Performing force analysis and stress calculations.
  • Understand the different types of static and dynamic seals, their selection and application. Performing simple and advanced analysis.
  • Recall the basic design knowledge, empirical relations, and standards to perform advanced comprehensive design for a particular mechanical system as a case study.
Programme Outcomes:
  • Ability to acquire and apply fundamental principles of science and engineering(60%)
  • Capability to communicate effectively(5%)
  • Acquisition of technical competence in specialised areas of engineering discipline(5%)
  • Ability to identify, formulate and model problems and find engineering solutions based on a systems approach(15%)
  • Ability to conduct research in chosen fields of engineering(10%)
  • Ability to work independently as well as with others in a team(5%)
Assessment Scheme:
  • Tutorial / Assignment - group assignment,focus group discussion at tutorial,to enhance understanding of basic concepts in lecture(20%)
  • Test Quiz - written exam (20%)
  • Final Exam - written exam (60%)
Teaching and Learning Activities: 47 hours (lectures,tutorials and laboratory experiment)
Credit Hours: 3
Pre-Requisite: EME2016: Engineering Design I
References:
  • J.E. Shigley and C.R. Mischke, “Mechanical Engineering Design? 6th edition, McGraw-Hill, 2004. (Textbook)
  • G.E. Dieter, “Engineering Design? 4th edition, McGraw- Hill, 2000.
  • K.T. Ulrich and S.D. Eppinger, “Product Design and Development? McGraw-Hill, 1995.
  • Ibrahim Zeid, "CAD/CAM Theory and Practice", McGraw-Hill, 1998.

Subject Contents

  • Springs

    • Terms and definitions. Helical springs. Extension and compression springs. Design of extension helical springs. Design of compression helical springs. Beam and leaf springs. Torsional springs.
     
  • Power Screws and Threaded Fasteners

    • Terminology and standards for threaded forms. Mechanics of power screws. Static screw stresses. Threaded fasteners, types and materials. Initial bolt tightening and joint compression. Bolt tension and joint compression with external load. Stiffness constants of fasteners and clamped members. Bolt or screw selection for static and fatigue loadings.
     
  • Drive Transmission

    • Motors classification, selection, and power calculations. Coupling. Clutches. Brakes. Flywheels. Flat, round, vee, and timing belts. Roller chain and wire rope. Sheave and drum.
     
  • Gear Design

    • Types of gears. Nomenclatures. Involute properties. Spur gears. Helical gears. Bevel gears. Worm gears. Gear trains.
     
  • Seals

    • Static seals. Dynamic seals. Compression types. Automated and pressure-actuated. Oil seals. Mechanical face seals. Labyrinth seals.
     
  • Cases Studies

    • Application to mechanical system design.