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Tensioning and Fiber Delivery

Table of Contents 1 Major Functions 2 Function: Hold Spool 2.1 Inputs to design: 2.2 Design Path: 2.3 Design: 2.4 Test Plans: 2.5 Fulfillment of requirement: 2.6 Going forward: 3 Function: Tension Fiber, Maintain Tension 3.1 Inputs to design: 3.2 Design Path: 3.3 Design: 3.4 Test Plans: 3.5 Fulfillment of requirement: 3.6 Going forward: 4 Function: Hold resin, Prevent Gelling, Apply Resin, Remove excess 4.1 Inputs to design: 4.2 Design Path 4.3 Design: 4.4 Test Plans: 4.5 Fulfillment of requirement: 4.6 Going forward: 5 Function: Guide fiber, Prevent twisting 5.1 Inputs to design: 5.2 Design Path: 5.3 Design: 5.4 Test Plans: 5.5 Fulfillment of requirement: 5.6 Going forward: 6 Bill of Materials

Major Functions

Function: Hold Spool

Inputs to design:

Design Path:

Design:

Test Plans:

• See test plan for tensioning system

Fulfillment of requirement:

• Spool mount can hold maximum load

Going forward:

• Finalize prints for mounting components

Function: Tension Fiber, Maintain Tension

Inputs to design:

Design Path:

Design:

Test Plans:

Fulfillment of requirement:

• Tensioning system added to prevent tow from slipping
• Adjustable tension for different fiber orientations
• Tension can be adjusted, no live measure/display

Going forward:

• Test tension output force to validate that engineering requirement is met
• Finalize design of spring pulley

Function: Hold resin, Prevent Gelling, Apply Resin, Remove excess

Inputs to design:

Design Path

Notes from SME- Dr. Ghoneim: Factors affecting Vf:

• Resin viscosity-material dependent, time dependent, volume dependent
• Wettability of fiber-material depedent
• Time in bath-fiber speed, length of bath

Agreed that the best way to approach resin bath is testing for Vf. Also agreed that constant tow speed is crucial.

Design:

Test Plans:

• Test for volume fraction of matrix (resin) in tube
• Know amount of fiber, can back calculate volume fraction of fiber and then resin

Fulfillment of requirement:

• System has resin bath
• Machine is easy to clean and remove resin

Going forward:

• Test for hardening time and correct resin volume
• Design brushes for resin application control

Function: Guide fiber, Prevent twisting

Inputs to design:

Design Path:

Design:

Test Plans:

• Running spindle with tow routed to assess travel though tow path
• Adjust roller arrangement as necessary to dial in tow travel

Fulfillment of requirement:

• Adaptable tow path to minimize instability and twisting through testing

Going forward:

• Finalize design of sprung tensioner to minimize risk of twisting/instability through slack
• Assemble and test tow path

Bill of Materials