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Engineering Design Cycle Engineering Design Cycle

Engineering Design Cycle - PowerPoint Presentation

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Uploaded On 2018-01-23

Engineering Design Cycle - PPT Presentation

Types of Engineers ChemicalBiochemical Civil Mechanical Electrical Computer Materials Biotech Aerospace Starting a Career in Engineering Every year nearly 100000 new college students enroll in engineering programs ID: 626124

arch bridge sticks building bridge arch building sticks sides max compression stick tips engineering road supports glue strong can

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Presentation Transcript

Slide1

Engineering Design CycleSlide2
Slide3

Types of Engineers

Chemical/Biochemical

Civil

Mechanical

Electrical

Computer

MaterialsBiotechAerospaceSlide4

Starting a Career in Engineering

Every year nearly 100,000 new college students enroll in engineering programs

What kind of activities do you enjoy doing?

Do these activities match with any areas of engineering?Slide5

Strong Shapes

Triangles—can’t change the shape without changing the length of one of the sides. Especially good with compression.

Arches—handle compression by sending it out to the edges

Columns—difficult to compress, need to be completely verticalSlide6
Slide7

A curved structure designed to carry loads across a gap mainly by compression.

ArchSlide8

Arch bridges

Always under compression.

The force of compression is pushed outward along the curve of the arch to the piers.

This greatly reduces the effects of tension on the underside of the arch. Slide9

Kintai Bridge

Iwakuni, JapanSlide10

Popsicle Stick Bridge BuildingSlide11

Most Common Bridge Types

Suspension Bridge

Truss Bridge

Arch Bridge

Beam Bridge

HybridsSlide12

Suspension BridgeSlide13

Truss Bridge – (Snohomish)Slide14

Arch BridgeSlide15

Beam BridgeSlide16

Hybrid – Sydney HarborSlide17

Popsicle Stick Bridges

SimpleSlide18

More ElaborateSlide19

How to Start

Know the Rules

Constraints & Specifications

Max mass of entire bridge: 275g (each stick weighs roughly 1.4g)

Length: 25” min 30” max

Width of bridge: max 5”

Road bed must be between 3” above and 7” above the supports

Bridge will be loaded from above, in the middle, on the road bed by a 3”x3” press—can’t be obstructed

Bridge parts can be no more than 9” above the supports, no lower than 1.5” below the supports

A 4”x 4” “vehicle” would need to be able to pass through your bridge on the roadbed

No sticks can be completely hidden from view

Only white Elmer’s Glue is allowedSlide20

“Only as strong as your weakest link”Slide21

How many sticks can we use?

Max weight of bridge = 275 grams

Each stick weighs 1.4 grams

275 / 1.4 =

196 sticks total

Save sticks for the road!

Each stick is 3/8” wide (.375”)

25” / .375” =

67 Sticks For Road Slide22

Building the Sides - Tips

Lay out full size on paper. Does it all fit?Slide23

Building the Sides - Tips

Use a Jig

Upper and Lower ChordsSlide24

Building the Sides- Tips

Consider roughing up the surface to be glued. Test to see if it helps??

Apply glue to Both sidesSlide25

Building Tips

Test different amounts of overlap

Once you find a good overlap, make a jig.Slide26

Building Tips

Easy Built Arch

Draw 8” max height

Draw 24” min Span

Clip 8 sticks together and bendSlide27

Building Tips

Easy Built Arch

Glue together and duplicate the other half

Join halves on paper and you’re done.