156B Week 7

Overview of Status of Analysis, Design, Fabrication, Tests, etc.

• Manufacturing of titanium pieces begun.

• Lay-up and number of plies for carbon base tube determined.

• Drawings of tubes running parallel to construction of everything else.

Accomplishments from Previous Week

• Completed FEA for static and frequency studies. Determined optimal lay-up configuration from lay-ups created. (Sam, Sean, & Angelica)

• Completed a few drawings of tubes in assembly, including angle, radius,and length for both ends. (Sam & Nicolas)

• Obtained titanium stock available from Bill Holland. (Ved & Nicolas)

• Started created fixtures for milling titanium tubes. (Sean & Sam)

• Learned how to apply adhesive to interface between carbon and titanium. (Ved)

• Began milling titanium stock for welding. (Sean, Ved & Angelica)

Goals for Next Week (list names after each item). Use specific and measurable objectives.

• Finish fixtures to hold titanium tubes during milling process. (Ved & Nicholas)

• Finish drawings of tubes with correct lengths and angles. (Angelica & Nicholas)

• Begin cutting titanium stock to correct length and milling for perfect fit between tubes. (Ved, Sean, & Angelica)

• Begin tack welding titanium pieces together for Bill Holland. (Sam)

• Finish fatigue study of optimal lay-up configuration. (Sam & Sean)

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

• N/A

Instructor Comments from Last Meeting and Actions Taken to Address these Comments  (indicate date of comments and if via email or in person)

• Allow for tolerances between carbon and titanium. (2/14/17 in person) Decided to construct titanium interface after receiving completed carbon tube from Mike Lopez. Will also talk to Tom and Mike about their tolerances.

• Check shell state by doing simple beam analysis with a load. (2/14/17 in person) Validation completed using Solidworks to confirm.

Comments from Other Students in the Class (indicate date of comments and if via email or in person)

• N/A

Risks and Areas of Concern

• Precise manufacturing of titanium tube creates a precision and time concern.

• Final welding will be done by someone other than the team so critical area failure testing may be somewhat off from actual failure results.

Resources or Information Required but not Available

• Solution to manufacturing both ends of a tube accurately when angles and orientations between both sides differ is needed.

Schedule

Budget (list amount spent and amount remaining)

• Spent: $1164.26

• Remaining: $ 8831.44

Progress on Report and Webpage

• Week 7 progress report complete.

• Second draft of report in progress.