Design Review Peggy Brown David Deaton Anna Henson

Project Description  The task is to design an apparatus that can stretch the fiber specimen specified by Manning Applied Technologies.  Objectives: 1.Create a system for ease of placement and removal of fiber specimens 2.Establish and maintain a stationary testing point for the fiber 3.Apply and measure a uniform load with a range of 50mN 4.Create apparatus from materials that are corrosive resistant in a compact form.

Fiber Stretching Process  STEP 1 : Attach fiber  STEP 2: Transfer fiber to motion system  STEP 3: Stretch fiber  STEP 4: Monitor displacement  STEP 5: Measure loading

Attachment Decision Matrix ADHESIVES TAPEOTHER Needs WeightJB weldHot glueElmer’s3MScotchKnotClampMagnets Cost Ease of use Fiber visibility Strength Set time Damage/ Fiber Survivability TOTALS The JB Weld scored the most total points, so it will be used to secure the fiber to the rods.

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

Transfer Tool  Purpose: The fiber must be protected from deformation or breaking during transport from the jig to the stretcher. Cam Positions

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

Motion 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

Alternative Comparison 1 2 3

Motion Decision Matrix Alternative 1Alternative 2Alternative 3 Issue/ConcernWeight Left/right handed screwGearMicrometers Precision5453 Amount of Machining Required-3322 User ability4442 Cost-3254 Final Score21205

Load Cell  Purpose: The load cell measures the force applied so the stress can be compared with the Raman data.  Design Components  Tapped load point  Tapped and threaded thru- hole  Data Output Wire

Load Indicator Design Alternatives 1) Digital Indicator 2) Computer Indicator 3) Instrumentation Amplifier Alternative 1 Alternative 2 Alternative 3

Load Indicator Decision Matrix Item 1Item 2Item 3 Issue/ConcernWeightDigitalComputerinstrumentation amplifier Precision5453 Easy of integration4543 Cost-3452 Usability4543 Final Scores484233

Deflection Measurement Method Alternative 1 Alternative 2 SourceToolMeasurement IncrementsAccuracyPrice ManningMicrometer0.0254mm0.02mm$ MSCEuro-Cal III Electronic Caliper0.01mm0.02mm$ MSCElectronic Digital Caliper 16 ES0.01mm0.03mm$81.43 McMasterMitutoyo Electronic Caliper0.01mm0.03mm$99.61 McMasterMitutoyo Coolant Proof Electronic Caliper0.01mm0.02mm$ McMasterMitutoyo Economy Electronic Caliper0.03mm0.2mm$86.25

Design Summary The team has concluded that the best alternatives are:  Adhesive with precision alignment rods  Motion alternative with single input  Digital Load Indicator  Digital calipers We plan to move into detailed design of all systems and order off the shelf components as soon as possible Key Milestones Completion Date 1Detail design of rods.January 20 2Detail design of transfer tool and jig.February 1 3Machine rods, transfer tool, and jig.February 15 4Test attachment process.March 1, 5Detail design of motion system and housing.March 15 6Machine motion system and housing.April 1 7Integrate systems for final product.April 10 8Test final product.April 20