me2101 0 introduction

8/18/2019 ME2101 0 Introduction

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Fundamentals of Mechanical Design

ME2101Dr. Goh Seach Chyr (Ernest)

Room: E1‐05‐17

[email protected]

Schedule of lectures:

• Dr Goh – First 3 weeks (25% of mark):

• Design process (Design assignment)

• Search for design solutions

•

Human

factors• Prof Seah –Middle 6 weeks (50% of mark)

• Prof Lai –Last 3 weeks (25% of mark):

• Design against fatigue leading to design of shafts

• Selection of rolling bearings

• Selection of materials


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Some information

on

ME2101…

• There is NO final examination for this module!

• Assessment is based on one small group design assignment (25%) and a quiz(75%).(Small group = minimum 2 maximum 3 students)

• Tutorial:

• Dr Goh, Prof Lai –None

•

Prof Seah

–Yes

Some information on ME2101…

• Text books:

• Dr Goh – No particular text book, but students are encouraged to read books about engineering design (shelf TA174), e.g:

• Design Concepts

for

Engineers

by

Horenstein (cases

studies)

• Engineering Design Process by Haik, Shahin (formal process)

• Engineering Design by Dhillon (human factors)

• Prof Seah – Mechanical Engineering Design by Shigley/Mischke, McGraw‐Hill.

• Prof Lai – None


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Formation of

project

groups

Design assignment:

• Form groups of 2 to 3 students by next lecture.

• Those unable to find partners will be assigned partners during the next lecture.

• Project titles will be announced next week.

What is engineering design?

• A purposeful activity directed toward the goal of fulfilling human needs, particularly those which can be met by technological factors of our civilization.

• Characteristics:

• Goal (or need) oriented

• Has multiple possible solutions

• Work within constraints

• Evolutionary/iterative

• Value comparative

• Outcome is guided by compromises


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Design philosophy

• Lexus:

1989 2013

• Philips:

http://www.philips.com/about/company/history/historyofthebrandmark/index.page


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Case study

‐The

Concorde

Case study ‐The Concorde


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Case study

‐The

Concorde



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Case study

‐The

Concorde


• What went wrong?

• National Geographic documentary:

www.youtube.com/watch?v=ByB6wO3F30Y


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Case study

‐The

Concorde



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Case study

‐The

Concorde



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Case study

‐The

Concorde


• Could the engines be placed further away from the wheels? ‐Space constraint due to delta wing design?

• Could the engine intake be redesigned to be slanted?

• Could the underside of the wing near the wheels be strengthened or made with tough but light‐weight materials so that fuel tank could not be punctured?


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Case study

‐The

Concorde

Other cases:

• The Straits Times 4 Feb 2010:


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Other cases:

• A Japan Airlines Boeing 787 Dreamliner surrounded by emergency vehicles at Logan International Airport in Boston, Monday 7 January 2013.

Other cases:

• Design flaws are responsible for 75% of all toy recalls. This percentage has remained consistent since 1988.


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Conclusions:

• There is still much to learn in area of design.

• Design engineers have still a long way to go to design perfectly safe products!

me2101 0 introduction

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