FRC Team 224

Team 224,The Tribe, is based out of Piscataway High School in Piscataway,NJ. We are a FIRST Robotics team. We basically build robots, and have fun while doing it. Website: http://www.team224.com (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) })(window,document,'script','//www.google-analytics.com/analytics.js','ga'); ga('create', 'UA-72213382-1', 'auto'); ga('send', 'pageview');

[infinitywarwidow]

Reblog if you are on a FIRST Robotics Team! (and put your team number if you would like to!)

I would love to get to know all of my lovely FIRST-ers out there!

[wxld-life]

1511!!

[jlafs-deactivated20200620]

20 and 195 here!

[firstthroughtheeyes]

228, 195, and 999!

[narwhal-trash]

1100

[stahlthecavalier]

1073!

[miimeverse]

2169

[hyperspacial]

2826

[geekleyweekley]

2169

[just-first-robotics-things]

2052 KnightKrawler!!!

[sr1899-blog]

1899! c:

[invictus3593]

3593

[frcteam224]

Definately not from 224

[frcteam224]

person: you need to stop with all the game puns

me: you need to recycle your attitude

[frcteam224]

A Collection of Videos from Week 2

The link above is a small collection of videos that were shot of the various prototypes that were worked on during the week. Enjoy :)

[team2896damien]

Trying to get the team to focus during a meeting

[frcteam224]

One word. Freshman 

[pukyeapukwudgie]

Welcome to robotics where we get productive in the last half hour of our meetings

[frcteam224]

Same.

[frc2508]

Second functioning wheel prototype #omgrobots #firststronghold #frc2508

[frcteam224]

Build Season Life

friend: hey you wanna hangout after school?

me: i can't, robots.

friend: what about this weekend?

me: robots.

friend: ...next week?

me: robots.

friend: okay, how about--

me: robots

friend: ...

me: robots.

[frcteam224]

A small collection of 224's pictures from the first week of Build season.

As you know, the first week is over and the link included shows some pictures of what our first week was like. We discussed what the best way to earn points are  and just went through the game manual, and dissecting each section. This Saturday, we also started to prototype

[frcteam224]

Hello! I'm a member of an frc team and I just wanted to wish your team a good luck for this building season. I hope to see you at competitions!

Thank you! Good luck to your team as well!

[frcteam224]

FIRST STRONGHOLD Game Reveal

This is the official game animation for the 2016 FIRST Robotics Competition game, FIRST STRONGHOLD. The game was announced Saturday, January 9, 2016. For mor...

Alright Guys! Today was the day that we’ve been waiting for for a long, long time. KICKOFF! If any of you haven’t seen the videos, the link is there above. Team 224 wishes you all well for this season. See you after build season. 

[frcteam224]

Trying to imagine what this season's game will be. We can only think of defense oriented ideas.

[engineeringtldr]

More Than You Ever Wanted to Know About Mechanical Engineering, Part 24: Fracture Mechanics and Stress Intensity Factors

We know that a material which contains a crack may experience a very high stress concentration factor at the crack tip, allowing the crack to propagate extremely rapidly under the right circumstances. We’d like to have some way of understanding the kinds of stresses at the crack tip and predicting when this will happen.

Let’s examine the geometry of a crack in a little more detail. We know that there can be very large stresses generated at a crack. In a ductile material, this means that there will be a zone around the crack where the stresses are high enough that the material behaves plastically, deforming in response to the stress. We’re going to make the assumption that this zone of deformation is small in comparison to the overall part. This allows us to analyze the situation using the methods we’ve developed for looking at stress and strain in elastic materials, since that’s how the bulk of the part will behave. If the zone of local yielding is not small, you need a more complicated approach that can take into account the nonlinear behavior of plastic materials.

(Image from Machine Design: An Integrated Approach, 4th Ed., by Robert L. Norton.)

We’re also going to make the assumption that we’re dealing with a crack in tension. Mode I in the image below is what we’re looking at.

(Image from Machine Design: An Integrated Approach, 4th Ed., by Robert L. Norton.)

Anyways, the stresses in the zone around the crack tip vary with distance, r, and angle, θ. If the material in the immediate vicinity of the crack were elastic, we could analyze it with the regular equations for stress and strain and get an expression in cylindrical coordinates to characterize the stress field.

However, since we’re dealing with plastic deformation, we need some way to account for this. We’ll do this by including a stress intensity factor, K, whose value depends on the geometry of the part and the crack and the nominal stress the part would be subjected to if the crack weren’t there. This is basically another kind of stress concentration factor. For example, for a plate in tension with a crack in the center, where the crack width (2a) is small compared to the width of the plate (2b), the stress intensity factor is:

If the crack width is pretty large compared to the width of the plate, or the part is more complicated than just a plate, there’s an additional factor, β, to correct for that. This isn’t something you’d have to calculate - like stress concentration factors, you’d get it from tabulated values in a handbook.

For every material, there is a critical value of K, K_c, the fracture toughness. If a crack produces a K greater than the fracture toughness, the crack will experience sudden, rapid propagation of the sort that generally results in catastrophic failure. Generally speaking, more ductile materials (that is, materials with a lower modulus of elasticity) will tend to have a higher fracture toughness (i.e. if cracked, it will take more stress for them to fail than it would for a brittle material with the same crack). This fracture toughness is what you use to calculate safety factor for cracks.

[frcteam224]

Engineering

[frcteam224]

Trying to imagine what this season's game will be. We can only think of defense oriented ideas.

[thatmetalnamegirl]

I'm screaming

What are your thoughts on the possible game of First Stronghold?

[frcteam224]

While watching a live-stream about the teaser and It’s meaning, We were able come up with many theories. One of those would be the theory that There would be a Battle sort of thing. Red Alliance would be Defense, defending some sort of tower or that specific side of the playing field while the Blue alliance is throwing projectiles into the tower or the Red Alliances field. However I cannot seem to figure out how scoring would work. Capture the Flag was also mentioned as well as different variations of the Battle type game that was mentioned above.

(This was copied and pasted from a previous post of ours)

[frcteam224]

what she says: i'm fine

what she means: why did first release such an intricate teaser? why did they give out the game name? are the blueprints supposed to be the field layout? when the video says "fight together," why does it only pan over to one other team? is this suggesting there will only be two teams per alliance? this wouldn't be the first time. will the game involve capturing or getting flags? we know there will be bumpers so how will offense vs defense be incorporated? i can't wait until January 9 2016

[phantabulous-killjoy]

anyone whos interested in frc care to spam me with your ideas about what the challenge is gonna be???

[frcteam224]

We made a post about this before as well. I’ve copied and pasted it below:

While watching a live-stream about the teaser and It’s meaning, We were able come up with many theories. One of those would be the theory that There would be a Battle sort of thing. Red Alliance would be Defense, defending some sort of tower or that specific side of the playing field while the Blue alliance is throwing projectiles into the tower or the Red Alliances field. However I cannot seem to figure out how scoring would work. Capture the Flag was also mentioned as well as different variations of the Battle type game that was mentioned above.

[frcteam224]

FRC Stronghold Theories

While watching a live-stream about the teaser and It’s meaning, We were able come up with many theories. One of those would be the theory that There would be a Battle sort of thing. Red Alliance would be Defense, defending some sort of tower or that specific side of the playing field while the Blue alliance is throwing projectiles into the tower or the Red Alliances field. However I cannot seem to figure out how scoring would work. Capture the Flag was also mentioned as well as different variations of the Battle type game that was mentioned above. 

We’re welcome to accept any possible theories and explanations about this season’s teaser. Tag your posts #FRC224.