156B Week 8

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

• Most of milling/cutting titanium tubes completed.

• Completed stress, frequency, and fatigue analyses.

• Assembly of trike components begun.

Accomplishments from Previous Week

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

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

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

• Got Bill Holland 0.875 cm titanium so that he could bend them. (Sam)

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

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

• Finish cutting and milling titanium tubes. (Angie, Ved, Nick & Sean)

• Finish tack welding the front assembly and boom. (Sam)

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

• Use more realistic forces when accounting for displacement. (2/21/17 in person) Analysis recomputed and found to displace very minimally; i.e. ~7 mm.

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

• Outsource production of certain trike areas to machine shops in the area so that manufacturing of tubes can be done in parallel. (2/21/17 in person) Rather than outsource to independent shops, the team reached out to Bill Holland and was thus able to mill out most of the tubes necessary for assembly within a single day.

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.

Resources or Information Required but not Available

• N/A

Schedule

Budget (list amount spent and amount remaining)

• Spent: $0.00

• Remaining: $ 8831.44

Progress on Report and Webpage

• Week 8 progress report complete.

• Second draft of report in progress and will be uploaded to website by Friday, March 3rd.