2024-09-23 Mechanical Meeting

Item

Notes

Announcements

• Action items I set from last weeks meeting:

  • Have material ready to set a track width, wheelbase, and CoG location (by Thursday night)

  • Have the requirements sheet completely filled in to the best of your ability

  • Have architecture brainstorm ideas

• We will be bringing Daybreak to the EnergizeUT event on Wednesday - please volunteer if you are able

• start having full system meetings

• First workday will all new members will be this Saturday. What are we planning for them? (list down below)

  • lecture

• There should no longer be weeks without system meetings

  • Discussion topics

    • What got accomplished in the week prior

    • What must be accomplished in the week following

    • What each member will be working on

  • Use meetings as a time to work. We cannot finish a car in two years if people only collaborate on Saturday - time to collaborate on actual work at system meetings

• We need to start working on Daybreak

  • Please have week-by-week timelines for each system by tomorrow (use the Gantt chart on the SharePoint)

SRR Prep

SRR Official Date: Sunday, October 6, 2024?

Trial Run:

• Friday, 9/27 for Body

• Friday, 10/4 for everyone else

• Continue working on your slides

• Start coming up with potential questions the audience might ask and prepare answers for them

• SRR Example Resources:

  • Dynamics

    • Electric Dynamics SRR

    • Combustion Dynamics SRR

  • Body

    • Electric Body SRR

    • Combustion Body SRR

  • Aeroshell

    • Electric Aero SRR

    • Combustion Aero SRR

    • Combustion Composites SRR (2024)

    • Combustion Composites SRR (2023)

  • Emech

    • Electric Powertrain SRR

    • Electric Electronics SRR

• Who do we want to invite to SRR

  • Thiago - All

  • Jacob - All

  • Nathan - All

  • Dr. Keena - All

  • Jonathan Parra - All

  • Kellen - All

  • Sidharth Babu - All

  • Esther - Aero

  • Eesha - Aero

  • Wesley - Aero

  • Clayton - Aero

  • Conrad - Aero

  • Tanu - Dynamics

  • Maddox - Dynamics

  • Andrew Cloran - Dynamics

  • Tyler - Dynamics

  • Blake Christerson - Dynamics

  • Julian - Emech

  • Clark - Emech

  • Kevin - Emech

  • Matthew - Body

  • Gautam - Body

  • Lani - Body

  • Tommy - Body

  • Ryan - Body

Recruiting

Refer to table below

Aeroshell

Aanya, Gaia, Aniq, Sai, Akhilesh, Grant, Pranav, Saahil, Aadith, Saadhika

Elizabeth, Bryan, Nikhil, Harshith, Ameya

Maya, Laila, Saleen, Jaden

Fergo

Nazneen, Grace, Akash, Arjun, Devansh, Noya

Laura, Jaelyn

Abi, Willie

Dynamics

Sohan, Tea, Oliver, Carter, Sumi, Manas, Aryan, William, La'akea, Anshul

Jacob Chen, Ashley Chu, Mia Thompson, Peter Nguyen, Sean Yu

Kevin, Joshua, Kiran, Jonathan

Emech

Tejas, Surabhi, Sophia, Annie, Talha, Aadi

Pradyota

Taru, Issac, Gavin, Valentina

What is something you struggled with this week? What is something you are proud of this week?

Struggled: Staying on top of timelines and communication

• daybreak control arms progress

• SRR progress behind

Proud: Good trial workday

doing work ; good trial workday

<-

Workday Review

Trial workday

• pretty much only trial workday

• we had one member from each subsystem stay back

Composites

• javi worked on his research paper

Aerodynamics

• abishek worked on the sheet to copy to research nose

• Trial workday yippee!

• Ergo:

  • Carol worked on brake line calculations, made a really nice research document

• Frame:

  • Most members were at trial workday lmao

  • Alyssa created 2 practice parts and utilized the weldment feature
    
    

• Caught current members up with changes to electrical system

• Ajay has first version of water proof enclosure, want to give to freshmen for manufacturing and testing

• Trial workday 2nd half, nothing much got done

First Workday Plan

Housekeeping: ~ 2 hours

• Join Slack/Discord

• Install software (SolidWorks, Fusion 360, Ansys, Bild, etc.)

Lunch

• Walk to lunch

New members

• Everyone installs software – Solidworks, HSMWorks, Slack, BILD

• Steven joins the new member in our practice CAD task (groups of 2-3)

• Jacob does a mini-solids lecture

• compile research and resources for new members

• send them our presentation from trial

• at some point i want dynamics to split off to talk about structuring, slack channels, communication, subsystem debrief, resources etc. - going through DB cad and assemblies - get an idea of what subsys. does what

• vsusp review for those interested in suspension

• aerodynamics

  • get people installing software(solidworks, slack, BILD, etc)

  • while theyre installing begin to introduce the slides where they can research different shell shapes

  • LUNCH!

  • second half of day will be solidworks, get them started on basic sketches and all that

  • for the people who have solidworks experience already and don’t want to relearn, we may begin to help them w ANSYS

• composites

  • again get them their software(solidworks, slack, BILD, etc)

  • introduce the 3 research projects and get them caught up, assigned to, and working on one of the 3

• Frame

  • Preliminary powerpoint presentation explaining subsystem goals, this year’s design choices, current state of the subsystem, etc.

  • Cantilevered beam problem: talk about what happens to a simply supported beam in pure bending,build understanding of fundamentals and how it applies to frame context (e.g., I-beam vs a solid beam)

  • Have them solve an equation of beam in pure bending

• Start installing software - Bild, Ansys, Solidworks

• Give brief electrical architecure/car layout lecture

• More in-depth lecture for enclosures and cooling

• 1 of our members has extensive Ansys knowledge, help setup the environment for cooling members while above is happening

• Everyone will be on solidworks after lunch, looking at the old parts, all the hardware that's going in the car.

• Start having them get familiar with SW env, start doing sketches, familiarize them with manufacturing methods, DFM, skeleton modeling

• TIW Certified for prototyping and making enclosures for daybreak (laser cutting)

• Acetone bath setup for ABS printed parts

Old members

• help.

• help leads w new member onboarding iono we dont even got nun tbh that's bad

composites: research (i mean tbf i only have 1 so like not much is gonna happen in that sense lol)

Architecture Ideas

• External vs Internal Suspension

  • external - wheel covers involves aeroshell help - no clue how steering and suspension mounting will interface w the covers and uprights, prolly have to do different calcs/sims w suspension components (CF pushrods, bottom CF control arm) fatigue and aerodynamics - concerns ab aerodynamics, have to account for the fact that whatever exposed wheels and suspension assembly will create > significant amt of drag

  • internal - increase shell width (harder to account for tipping), wheel cutouts 😞 , harder accessibility

• Top mounted steering vs bottom mounted w solid column

  • better and more goated for packaging and less compliance from columns and ujoints needing a secondary mount to the frame - not in the damn way of the driver

  • dk how this interfaces with an external suspension

• Double-wishbone vs trailing arm front suspension

• Double-wishbone vs trailing arm rear suspension

• Bearings in hub or upright - dead axle vs live axle vs hub is axle

Canopy Location(front, middle, back)

Aero covers on control arms (idk if this counts bc it shouldn’t rly affect anyone else)

Composite testing plans

• Frame

• cf Pushrods (and maybe dev of cf control arms?!?!)

external vs internal suspension

Beam element simulation vs Solid element simulation

Multi-Level Frame (we are not debating this, we are doing it)

• Hexagonal front frame profile to adjust hdpt heights and wishbone lengths

• Adjust heights for ergo packaging w/out affecting suspension

• Cons - adds complexity and makes it harder to load path; added weight bc more tubes?

Roll hoop front and battery in back

Battery in front and roll hoop in back

Battery:

• split battery or not

• where it goes - front or back

Topological Mapping:

• # of sensors

• # of boards

• power routing

• board layouts + connector layouts

• How many peripherals

Onboarding

https://cloud.wikis.utexas.edu/wiki/x/4opvCw