Design ReviewDesign ReviewPeggy BrownPeggy Brown

David DeatonDavid Deaton

Anna HensonAnna Henson

Project DescriptionProject Description The task is to design an apparatus that can The task is to design an apparatus that can

stretch the fiber specimen specified by Manning stretch the fiber specimen specified by Manning Applied Technologies.Applied Technologies.

Objectives:Objectives:1.1. Create a system for ease of placement and removal of Create a system for ease of placement and removal of

fiber specimensfiber specimens2.2. Establish and maintain a stationary testing point for the Establish and maintain a stationary testing point for the

fiberfiber3.3. Apply and measure a uniform load with a range of Apply and measure a uniform load with a range of

50mN50mN4.4. Create apparatus from materials that are corrosive Create apparatus from materials that are corrosive

resistant in a compact form.resistant in a compact form.

Fiber Stretching ProcessFiber Stretching Process

STEP 1 : Attach fiberSTEP 1 : Attach fiber STEP 2: Transfer fiber to motion systemSTEP 2: Transfer fiber to motion system STEP 3: Stretch fiberSTEP 3: Stretch fiber STEP 4: Monitor displacementSTEP 4: Monitor displacement STEP 5: Measure loadingSTEP 5: Measure loading

Attachment Decision MatrixAttachment Decision Matrix

ADHESIVES   TAPE OTHER  

NeedsNeeds Weight JB weld Hot glue Elmer’s 3M Scotch Knot Clamp Magnets

Cost 2.5 3 4 5 3 5 5 2 3

Ease of use 4 3 4 4 4 4 1 3 3

Fiber visibility 4 5 1 2 2 2 3 2 2

Strength 5 5 2.5 1 3 2 2.5 3 3

Set time 3 2 3 3 3 3 2.5 3 3

Damage/Fiber Survivability 5 4 5 5 5 5 3 1 2.5

TOTALS   90.590.5 76.5 75.5 80.5 80.5 63.5 54 64

The JB Weld scored the most total points, so it will be used to secure the fiber to the rods.

Fiber Attachment MethodFiber Attachment Method

Purpose: The rod Purpose: The rod keeps the fiber in keeps the fiber in precision alignment precision alignment and the attachment and the attachment method prevents method prevents slippage so the laser slippage so the laser spot does not move spot does not move (6-degree constraint) (6-degree constraint) during stretching.during stretching.

Fiber Alignment Rod

Transfer ToolTransfer Tool

Purpose: The fiber Purpose: The fiber must be protected must be protected from deformation or from deformation or breaking during breaking during transport from the jig transport from the jig to the stretcher.to the stretcher.

Cam Positions

JigJig

Purpose: Hold Purpose: Hold transfer tool while transfer tool while fiber and adhesive fiber and adhesive are applied for ease are applied for ease of use.of use.

Motion System NeedsMotion System Needs The fiber needs to be

stretched so the laser can measure molecular properties of the fiber under strain. The stretching needs to be symmetric so the sample spot does not move.

Alternative 1

Alternative 3

Alternative 2

AlternativeAlternative ComparisonComparison

1

2 3

Motion Decision MatrixMotion Decision Matrix

Alternative 1 Alternative 2 Alternative 3

Issue/Concern WeightLeft/right handed screw Gear Micrometers

Precision 5 4 5 3

Amount of Machining Required -3 3 2 2

User ability 4 4 4 2

Cost -3 2 5 4

Final Score 21 20 5

Load CellLoad Cell Purpose: The load cell Purpose: The load cell

measures the force measures the force applied so the stress can applied so the stress can be compared with the be compared with the Raman data.Raman data.

Design ComponentsDesign Components Tapped load pointTapped load point Tapped and threaded thru-Tapped and threaded thru-

holehole Data Output WireData Output Wire

Load Indicator Design AlternativesLoad Indicator Design Alternatives

1)1) Digital IndicatorDigital Indicator

2)2) Computer IndicatorComputer Indicator

3)3) Instrumentation Instrumentation AmplifierAmplifier

Alternative 1

Alternative 2Alternative 3

Load Indicator Decision MatrixLoad Indicator Decision Matrix

Item 1 Item 2 Item 3

Issue/Concern Weight Digital Computer instrumentation amplifier

Precision 5 4 5 3

Easy of integration 4 5 4 3

Cost -3 4 5 2

Usability 4 5 4 3

Final Scores 48 42 33

Deflection Measurement MethodDeflection Measurement MethodAlternative 1 Alternative 2

Source Tool Measurement Increments Accuracy Price

Manning Micrometer 0.0254mm 0.02mm $117.00

MSC Euro-Cal III Electronic Caliper 0.01mm 0.02mm $119.00

MSC Electronic Digital Caliper 16 ES 0.01mm 0.03mm $81.43

McMaster Mitutoyo Electronic Caliper 0.01mm 0.03mm $99.61

McMaster Mitutoyo Coolant Proof Electronic Caliper 0.01mm 0.02mm $143.00

McMaster Mitutoyo Economy Electronic Caliper 0.03mm 0.2mm $86.25

Design SummaryDesign Summary

The team has concluded that the The team has concluded that the best alternatives are:best alternatives are:

Adhesive with precision Adhesive with precision alignment rodsalignment rods

Motion alternative with single Motion alternative with single inputinput

Digital Load IndicatorDigital Load Indicator Digital calipersDigital calipers

We plan to move into detailed We plan to move into detailed design of all systems and design of all systems and order off the shelf components order off the shelf components as soon as possibleas soon as possible

Key MilestonesCompletion

Date

1 Detail design of rods. January 20

2 Detail design of transfer tool and jig. February 1

3 Machine rods, transfer tool, and jig. February 15

4 Test attachment process. March 1,

5 Detail design of motion system and housing. March 15

6 Machine motion system and housing. April 1

7 Integrate systems for final product. April 10

8 Test final product. April 20