Engineering Design

ByMohd Nazim Abdul Rahman

Department of Design & InnovationFaculty of Mechanical Engineering

BMCD 2573

What is Design?

• “to fashion after a plan” - Webster's dictionary• to design is to create something that has never

been• although engineers are not the only people

who design things• To design is to pull together / synthesis

something new or to arrange existing things in a new way to satisfy a recognized need of society

Design

• Good design requires both analysis and synthesis• Understand how the part will perform in service• Able to calculate expected behavior before it

exists in physical form by using the appropriate disciplines of science and engineering and the necessary computational tools – ANALYSIS

• Identification of the design elements that will comprise the product into workable system - SYNTHESIS

Video Show!!!!!

Engineering Design Process

• Starts with recognition of the need for the product.

• Both design and redesign require knowledge of the intended use of the product, plus information on the– Market– Technical data– Materials and production

• For any product design you are part of a team!!!

Engineering Design Process contn’

• Determine the need– Starts with recognition of a need– Sketching of the solution (product) is very useful

during this step.• Establish known information

– Includes gathering information on aspects of the products such as possible materials, market analysis, ability to manufacture, cost to manufacture, etc.

Engineering Design Process contn’

• Stimulate Design Concepts– Consider the various aspects in the manufacture

of the product such as material, shape, etc.• Investigate Design Concepts with Analytical

Tools– Use modern methods and tools to analyze design

alternatives.

Engineering Design Process contn’

• Gather all information and review– Gather together all information and design

alternatives and review so that decisions can be made.

• Test the design that appears best.• Accept, Modify, or Reject• Optimize the design by iteration

Types of Design

• Original design - innovative design, It employs an original, innovative concept to achieve a need

• Adaptive design - adapts a known ' solution to satisfy a different need to produce a novel application

• Redesign - improve an existing design

Types of Design

• Selection design - design task consists of selecting the components with the needed performance, quality, and cost from the catalogs of potential vendors

• Industrial design - improving the appeal of a product to the human senses, especially its visual appeal, more artistic than engineering