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.