Mech 1208 Week 2

Mechanical Design

What is mechanical design?

a systematic process for devising a product or service to meet a technical need within contraints

What need is there for mechanical design?

healthcare, transportation, energy, water

What is design in the arts?

the creation of an object for aesthetic function

What is a design in engineering for?

Object must have a utility or function

Design problems are

ill-defined, ill-structured, open-ended, well defined

What makes a design successful?

simple, creative, iteration

Waterfall process

analysis, design, development, test, deploy

Spiral process

multiple rounds (iterations)

Agile process

undefined deliverables

Engineering steps to obtain a successful design

feasilbility study, preliminary design, detailed design, production

Requirements Developed for first stage of Waterfall Design Process

recognize need, identify problem, define requirements

Conceptual Design for second state of Waterfall Design Process

generate innovative concepts, select best concepts

Detailed Design for third state of Waterfall Design Process

product layout, material selection, system simulation, prototype and testing, and design documentation

Production for third state of Waterfall Design Process

type of manufacturing, production volume, supplier selection

Spiral Design Process

identify need and gather information, synthesis, analysis, implementation, documentation

functional performance

what the product must accomplish

manufacturing

resource and material limitations

economic issues

budget, cost, price, profit

environmental impact

during production, use, and retirement

ergonomic concerns

human fa ctors, aesthetics, ease of use

global issues

international markets, needs, opportunities

lice cycle issues

use, maintenance, and planned obsolescence

social factors

civic, urban, cultural issues

divergent thinking

adds new ideas

convergent thinking

use best ideas

What are standard parts useful for?

mass production

Significance of the production phase

critical to the success of the product and considered a post-design operation by some

Don’t need formulas to study to solve ill-defined problems

false

When working on a project, have no distractions

false

Waterfall design process requires you to wait for conceptual design to be completed before working on detailed design

true

Agile and waterfall processes are opposite

true

Art painting aesthetic purposes only

true

Solidworks files are kept together for assemblies to open properly

true

I’ll defined problems are often in the industry

true

wait for final iteration before making prototypes

false

I’ll defined problem, stop and don’t solv before making it well-defined

false

Successful design must be complex

false

double-size of design is ill-defined problem

false

blue-lines are under-contrained and unacceptable sketch

true

directory first before assembling parts

true