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Design Review

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: Create a system for ease of placement and removal of fiber specimens

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Design Review

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  1. Design Review Peggy Brown David Deaton Anna Henson

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

  3. 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

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

  5. Fiber Attachment Method Fiber Alignment Rod • 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.

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

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

  8. Motion System Needs Alternative 1 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 2 Alternative 3

  9. AlternativeComparison 1 2 3

  10. Motion Decision Matrix

  11. 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

  12. Load Indicator Design Alternatives Alternative 1 • Digital Indicator • Computer Indicator • Instrumentation Amplifier Alternative 3 Alternative 2

  13. Load Indicator Decision Matrix

  14. Deflection Measurement Method Alternative 1 Alternative 2

  15. 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

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