{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

chapter4

# chapter4 - EML 3004C CHAPTER 4 What is Design Namas Chandra...

This preview shows pages 1–9. Sign up to view the full content.

Namas Chandra Introduction to Mechanical engineering Chapter 4-1 EML 3004C CHAPTER 4 What is Design?

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Namas Chandra Introduction to Mechanical engineering Chapter 4-2 EML 3004C Objectives Sections 4.1 Concept of Design 4.2 Difference between design and analysis 4.3 Good design versus bad design 4.4 Design Cycle The meaning of the word “design” Difference between design, analysis and reproduction Difference between good and bad design Engineering Design Process Design Cycle A design competition example
Namas Chandra Introduction to Mechanical engineering Chapter 4-3 EML 3004C 4.1 Concept of Design Design is the development of a product or device to meet a specific need Design may not necessarily be a physical product Development of Microsoft word software is considered a software design of a word processing program. In mechanical engineering world, by device we typically mean a product. It may range from an automobile, engine or even a spark plug.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Namas Chandra Introduction to Mechanical engineering Chapter 4-4 EML 3004C 4.2 Difference Between Design and Analysis Analysis is different from design or reproduction Analysis is the application of engineering science and mathematics to a well-defined, well-posed process with a unique solution. Design is a solution to a problem with ill-posed constraints. There are many possible solutions all valid to the problem. Analysis …….. If a 6' man reaches the top of the building at 32° standing 40' away from base, what is the height of the building? Design …….. Given a building, device a method to measure the height of the building. .
Namas Chandra Introduction to Mechanical engineering Chapter 4-5 EML 3004C Design example of a Catapult Rewind back to middle ages! We need to design a device to haul objects from a distance accurately on to a target. Suppose we need to determine the trajectory given all geometric variables, we can use basic dynamic equation: 2 2 2 2 0 0 2 2 / 0 cos sin x y x y o x y F ma a F m dv d x dt dt dv d y g dt dt dx v V dt dy v V dt V v v θ θ = = = = = = - = = = = = + Given specific x, angle and distance we have a unique velocity to get to the target- Analysis But there are many possible ways to choose combination of these variables- Design .

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Namas Chandra Introduction to Mechanical engineering Chapter 4-6 EML 3004C Analysis of the Catapult Trajectory
Namas Chandra Introduction to Mechanical engineering Chapter 4-7 EML 3004C 4.3 Good vs. Bad Design In general a design that just barely meets the expectation is a bad design. If the design fails to meet the requirement it is no design. If a design exceeds expectation in terms of cost, performance, maintenance, rugged, eventual disposal and safety then it is a good design.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Namas Chandra Introduction to Mechanical engineering Chapter 4-8 EML 3004C 4.3 Good vs. Bad Design Some characteristics of Good Design 1. Does the product meet technical requirements?
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern