I am going to be a bit busy today in the rush to get closer to finding our hardpoints! Please please let me know if there is anything I should be clearer on - some of these tasks are urging you to begin researching and understanding things that most of the current members do not really even have a great grasp on so let us know if I can help guide your learning.

Prioritize your mental health this week and this weekend!

these are the things I want you guys to work on:

In the spirit of trying to be more organized about assignments Ill take a count of which one of these each person touched on. Throughout your work today / this week, please refer back to this page and type your own answers/notes/updates in here. If you intend to have more thorough notes or start making significant progress on a task then do feel free to just link or upload your doc!

Remember that it is encouraged to post your own material in any of our platforms and communicate through slack if you have any concerns, questions, or information to share!

Everyone:

• Make progress on your master model - then start making the parts for it

• if you would like to because you think it would benefit you / you didnt get to complete it as well as you would have liked then -

  • Finish SRR if you have not - take notes if you must

  • review the questions that were brought up during the suspension portion

  • work on the model mania cading

  • watch the bolted joints video assigned if not have alrdy - take notes

  • watch parra lectures recorded - notes

• make sure you can calculate the radial loads on the bearing - Harshit talked about it at dyn meeting

Carter:

https://docs.google.com/document/d/1PofRdyPQn6Ggvkay0szYLhfokKcrGXXy2nZMPqfmC14/edit?usp=sharing (I can put the summaries for each part in here but this doc has all my stuff so far)

• Today / this week please look into kinematics packages and software - you will be working with the CR liaison to get them to help us get software for free to model our suspension - needs to be trailing arm

• I will give you the manuals to dynatune for trailing arm:

• Look into OptimumK software and see if anything tells us that they support the trailing arm w ONE wheel

• Kinematics Software - i uploaded manuals to Sharepoint

• if they cant, look into ADAMS software and take notes on its interface, what the offer, if ppl have any thoughts ab it from a solar pov - the learning curve is very very hard but we dont know why / havent seen the UI yet

• Specializing in new gen: vehicle dynamics

  • what is our ideal degree roll/g lat acceleration aka roll gradient - how relevant is it for solar car and how can we consider it when designing?

  • bump steer x steering members - how can suspension help mitigate this

  • caster x kingpin angle relationship - what do we want to optimize for and what are the different effects to our vehicle dyn that can be achieved from adjustments?

  • explore vsusp and kinematics software options - take notes please I want to know too!

La’akea:

• work on the reference sketch / master model and we will make sure that you understand how and how to make you first part using it (Had to start over because the my control arm lengths made no sense for any decent model, have a few questions I want to go over because I am a bit confused)

• may meet with composite / TRAVEL TO PICKLE in the last half of workday to see layup / testing process

• Specializing in new gen: composite integration and pushrods (Working on this week, not much progress so far as school load has been heavy)

  • understand the loads in the pushrods, what kind of inserts can we use?

  • radial load calculations on the rod ends at either end of the pushrods - benefit from doing the bearing calculations

  • understand composites and MATERIALS - why would we use CF instead of steel - why would we use steel instead of aluminum? - in what loading conditions are these materials strongest and thus when should we use them in what components?

Oliver:

• Research manufacturing methods for control arms and methods of bearing inserts - staking or internally grooving for ret rings (going to start researching this week)

• begin CADing a control arm for Daybreak that is 2 inches longer than the previous and can house a retaining ring (Im gonna test out something on the starter project. Once I do more research then I will jump into a cad with just the control arms.)

  • or can be staked if you understand enough about it

  • read the thread in general slack dyn-collab where we talk about staking bearings

  • the current daybreak CAs are aluminum waterjetted with three rodends - you can try to make the same type of aluminum waterjetted with housing a bearing - I started on front upper

  • but look at the uploaded pics of other teams control arms (solar cars in particular) and see if there are other reliable and manufacturable options - steel tubular may be too difficult bc of how short they still are and figuring out how to insert the rod ends in that case

• Specializing in manufacturing and daybreak:

  • bearing calculations, machining, control arms!

  • loads on control arms, manufacturing methods for control arms, methods of bearing retaining

  • Machining and manufacturing fundamentals - feeds and speeds, tooling, tolerancing

  • https://www.skf.com/us/products/rolling-bearings/principles-of-rolling-bearing-selection/bearing-selection-process/bearing-size/size-selection-based-on-rating-life/equivalent-dynamic-bearing-load-p

Manas:

• Meet with jonathan, and a frame member to talk about your plans for the trailing arm as well as what you guys have learned about it overall

  • if you guys need to - write out a plan and coordinate w each other on what resources you will look at and what tasks or projects you think you might be taking to model a trailing arm suspension

  • Met with Jonathan, compared and exchanged resources we found. Didn’t create a plan moving forward, hopefully will do that on Thursday.

• If you have a good idea of trailing arm mechanics - look a the dynatune manuals for trailing arm - I havent discerned if it is worth is for us to obtain dynatune because it is very hard to use SO I want you to read the manual after understanding what you are optimizing for in a trailing arm and see if dynatune trailing arm would be useful, useable, and addresses all our needs

  • Didn’t really work on it too much, the documentation was so confusing. I did find a different software that supports trailing arm suspension, but it seems and janky and not user friendly. Will research more.

• Kinematics Software

• Specializing in trailing arm and daybreak

  • hardpoints for trailing arm,

    • Didn’t work on this. Seems like a later problem 😭

  • shock to be used in trailing arm - coil, travel needed?, any specific spring rate or stiffness recommended for a rear 1 wheel trailing arm?

    • I found a few good articles about the characteristics. I will take notes and review with everyone on workday.

  • overall architecture of a trailing arm

    • Same, I will read research articles.

  • compare trailing arm to swing arm - what are the differences? pros, cons? - this was hard for me to find resources on so do your best to collect some resources

    • Simple trailing arm is better imo. Swing arm is better at handling lateral forces but is much heavier and I don't think they’re that much of a concern for our car. Trailing arm only moves in one plane, much much lighter and simpler to design and preferred by most teams.