Meeting Agenda:

• Sync Ups and Updates and Blockers

• New task - get more accurate masses of battery box and dynamics mounting 😮 since we have random 100 kg mass points everywhere. Those should be justified!!!

• Distribute work

Updates:

• Tommy - completed mass (got an approximation but could be improved)

  • mesh convergence studies on simulation was blocked (remote bay computers offline)

• Kimberly -

  • made progress

  • blocked by offline remote bay computers

• Min -

  • Mesh convergence tool doesn’t work on beam tools

  • Working on sheet metal into Chassis

  • blocked by bay computers

• Sheet metal placement (ASC Regs + Communicate with Interiors)

  • need to figure out occupant space and assembly interference

  • Component design of how the sheet metal would be installed onto the Chassis

    • Material Selection page by kimberly had some research about mounting parts

• Updated Master Assembly (Announcement into Chat)

• Updated Mass Assembly

Meeting Agenda:

1. Updates

2. Next Steps

3. Timeline Management

Updates:

• Tommy

  • Created an updated master assembly (again) lol

    • Updated Vehicle Assembly - Mechanical - Confluence (atlassian.net)

    • Some items aren’t up to date, but I still placed the dummy geometries inside to at least be able to visually see where things might interfere

  • Did more updated calculations on some mass items

    • the dynamics assembly masses in simulation no longer needs to be 100 kg.

      • Maybe lessen it to 50 kg and 70 kg respectively for example.

    • battery box is currently estimated to be ~60-65 kg + catamaran cover to be ~25 kg

    • Therefore we can reduce the point masses in simulations to more modest quantities

    • Create new task of accurate value for catamaran cover and battery box

  • Mesh Convergence Study on Tube Solution

    • as mesh size decreased, stresses increased and percent error increased

  • My confluence pages are messy

    • clean up → 1 page and not 2 jumping around

    • clean up updated project planning page

  • Tommy needs to start thinking about this project management and planning more

• Min

  • will be MIA for the next 2 weeks until after midterms

  • not much progress done on fea project this week

• Kimberly

  • Not too much work done this week

  • Looking to finalize and test out new collision object setup in ansys

  • hoping to get most of the work done this weekend and update confluence pages as progress is made

• Jens

  • spent a lot of time on design space

    • published Confluence page

    • looked through Regs - picked out potentially relevant ones + fasteners

      • fairly self-explanatory

  • finished all items except component design of sheet metal

• Aidan

  • will get started with helping Min

  • spend next week getting trained and familiarizing

  • after midterms, beginning helping with work shifts with Min on sheet metal solution task

New Tasks:

• Updated masses for catamaran cover + battery box? (Tommy)

  • it looks like it is close to 100 kg and so we can’t confidently reduce the point mass in simulations

• Updated master assembly (Tommy)

  • reach out to DRI’s for updated CAD file and positioning

• Mesh convergence studies (Tommy)

  • do finer meshes

• Work on Component design of sheet metal mounting (Jens)

• Re-organizing and project planning (Tommy)

Meeting Agenda:

• Updates

• Next Steps

• confirming availability with min and aiden

• bi-weekly goals - wednesday + saturday

Updates:

• Jens

  • Some progress made at the bottom

  • Sheet Metal Reinforcement Design Space - Mechanical - Confluence (atlassian.net)

• Tommy

  • need to complete follow-up tasks

  • will use remote desktop at weirder times so high priority projects can be worked on

• Kimberly

  • still working on collision setup

    • testing out on ansys

  • will try to take measurement of chassis sometime this week

    • CAD file afterwards

    • simulation TBD

• Aidan

  • got familiar with project

  • useful to go through video series

• Min

  • had an incorrect CAD

    • starting all over

    • just on wrong side of tubes + interference check with other assemblies

  • should create a baseline CAD model to start FEA

    • will send out baseline CAD model after to stakeholders for them to inspect their own interferences with their subassemblies

    • Can finish CAD model by Wednesday

  • Simulation side of things

    • Aidan can start taking a look at internal contacts

    • maximum 5 hours

    • can finish by Wednesday

      • will receive CAD model thursday and work on it afterwards

Meeting Agenda:

• updates + some next steps

• troubleshooting simulations possibly

Meeting Notes

• Tommy

  • no updates

• Jens

  • incorporated feedback

  • do full detailed design

• Min

  • I was able to get that reinforcement-chassis contact working. I just need to update the model and run it now, should be done in the afternoon/evening before the structures meeting

• Kimberly

  • running into issues with front bar - frictionless contact

Task –

• detailed material selection?

Meeting Agenda

• Sync-ups with Min and Kimberly

• Next steps provided by Mech Advisors

Meeting Notes

• Kimberly

  • Context: Vehicle Collision Object Setup

  • Stuck on frictionless contact.

    • There are linear(will solve) and nonlinear contacts

    • nonlinear contacts are frictionless, rough, friction

    • only way to get frictionless to solve is to fix a bunch of chassis tubes

  • Mock-up model

    • using older version of chassis model

    • see if results get better or not → pursue or not

• Min’s notes from Mech Advisor FEA review meeting

  • notes from my meeting with the advisors, turns out they do not bite at all and we NEED to use them faaaarrrrr more often! lets bug them (especially Matt, Jason, Shalin as they're chassis specialists) more often!!!!!
    Another notable thing that came out was that this "replicate the bottom panel" mantra seems to be running close to the end of the road. It no longer really seems to be addressing the problems that we are running into.
    Matt suggested a more iterative approach where we take the VDR sims, strip the BP, see the stresses and add tubes to address the stresses. Repeating this in an iterative design manner should be able to more accurately address the overall problem we are facing
    More points can be found in the doc, these are just initial and large thoughts.
    I'm going to follow up with Jason as he expressed interest in coming in this weekend to have a nice FEA grind session in person and try to see if our sims are accurate

• Kevin

  • Reach out to Matt, Shalin, and Jason to help full-detail review FEA

    • check all definitions, conditions, etc.

    • do a fine comb-through through FEA

    • messenger + individually reach out

  • Have we looked at setups from Matt, Shalin, Jason’s FEA sim

    • substitute new chassis model into old fea project files (MS12, MS14)

    • worried that chassis setup may have changed overtime

  • It was strange that the sheet metal did not improve stresses when the bottom panel did

    • create a virtual sheet metal that bonds with all the tubes that the bottom panel did

    • meeting was more focused on uncertainty regarding the results were accurate

  • If locations of high stresses are not where you are beefing up, it will remain high

    • if an area has high stress, it should be reinforced or provided a load path to lower the stress

  • Rope in more mech advisors and multiple advisors

    • varied opinions

    • specialty of advisors

    • Dynamics - Kevin, Devon, Robin

    • Chassis - Shalin, Matt, Jason

    • Composites - Adrian, Adam, Matt, Jason, SJ

  • Setup multiple 1on1’s?

    • Regardless, show off the entire chassis model and expose everything

    • Or send FEA model and ask them to look through it

    • Want to avoid saying yes to everything, and instead fully examine every aspect.