Each group had to design a device to crush an egg as quickly as possible using only cardboard

Team Mayan: Ratan Rai Sur, Sivan Shemesh, Emily George

Crusher mass:39.44g

We had the winning design because of our low mass and elegant design. Because of the rigidity of our crusher frame, we would be able to crush eggs all day long.

Team JAP

Pictured, left to right: Jackie Song, Peter Ascoli, and Alex Novoselov <3.

The Devil's Three-Way

Instron data:jap_eggcrush_data.pdf

Crusher mass: 38.9248g

Our team won the competition because from F=0, our crusher cracked the egg in under 1mm, the smallest amount of distance obtained by any team! Our design is also easily reproducible since it was laser-cut and we saved the AutoCAD files; this way, you can crush eggs any time!

crusher weight : 27.04g Our group definitely won since our egg crusher weighed the least, and it crushed the egg in less than 1.5mm.

Adam Cerini and Sambit Acharya's model weighed 39.74 grams! The egg broke at a distance of 12.5mm!

From Left to Right, Laura Quan, MJ Kang, and Sasha Vera. Structure weight: 29.2 grams.

Crusher Mass: 40.65g Team PMG won this Egg Crushing Competition because our design is the easiest to construct. Our design consisted of crumpling up one piece of cardboard and cutting a hole out of another piece. Thus making our design the easiest to replicate and easily walks away with the construct-ability factor. This was by far the most time efficient design and in reality if you are going to build something (specifically in the field of civil engineering) the cost of labor can easily be larger than the cost of materials, so in that sense our design was the most cost efficient as well.

Team Humpty Dumpty: Hetian Wu and Karmen Chong

Our crusher mass was 85.38 g. We crushed the egg at 43 mm with 180 N force

Meet Eggbert. As you can see, he is suffering from a massive fear of being crushed. We are about to put him out of his misery.

Team “Kill Eggbert”: Pnina Grossman, Kristin Miller, Johnathan Zorko

Our mass was 41.8 g. We crushed Eggbert at 4.6 mm with a force of 75 N. This force was less than the majority of the competition. Our Young's modulus was 0.93785 MPa, which was significantly higher than the majority of our competition. This means that the force is exerted efficiently over a small distance. The only team with a higher Young's modulus was Team Jap, but it should be considered that they destroyed their egg crushing machine in the process. Furthermore, after the initial crushing of Eggbert, the force exerted returned to less than 10 N, which indicates that our machine was still serviceable after use. Most importantly, our team won the Egg Crushing Competition because we had a very noble goal, in that we allowed Eggbert to ascend to the Big Farm in the Sky.

Team: Raymond Foo, James Sargeant, Jimmy Espinoza

Crusher Mass: 18.32 g

When Wayne Enterprises planned out the design of our egg crusher, we decided that we wanted to have the lightest design possible. We came up with a design that was simple and, when we tested it out, seemed efficient. However, after our egg crusher succeeded in its test run, we decided to take a risk and cut out more weight from the sides that were supporting the egg. This turned out to be a bad decision since our device folded on itself and the egg was not crushed.

Team Mexican Spirit; Anthony Simonetti, John Biswakarma, Russell Sternlicht

Which Came First?! Linn, Malcolm, Mary, or Tabitha??

Our strategy for crushing the egg was to concentrate the load as much as possible. We did this by designing a top piece with a wide base (touching the platen) and a small area that touches the egg.

Crusher Mass: 40.6 g The egg cracked at approximately 5.5 mm

Team JIMMY (and Eugene)

Team Jimmy's plan for crushing the end was to create a mechanism in which the egg would be crushed between two claw-like pincers that would fold in and apply pressure on the egg when downward pressure was applied on the structure. However, it did not work out because the load was unevenly distributed on our structure, causing it to bend towards one side.

Crusher Mass: 41.2g


Crusher mass: 28.86g

Crusher mass: 67.57g

We won this Egg Crushing Competition because our design is not only functional but is also the easiest to construct. Our design required minimal machinery to construct and would cost the least to manufacture. As a result, from a practical standpoint, our product is the most likely to be manufactured and therefore, that should be the main criteria for winning.

Team Freshman

Jeffery Tam, Jenna Lee, Matthew Lee

Mass is 48.53 grams From the graph, one can see that our egg must have been broken at a distance of 4 mm. The mass of our egg crusher is 48.53 grams, therefore we believe that we have won. Also, we have the group with the freshman, which adds a handicap bonus of 0.1 to our total score.

Team Gobach

Team Members: Daniel Bach and Gary Go
Our Team The Egg Disassembly Mechanism
Instron Tester Data

Mass = 79.05g

Our Egg Crusher broke the egg with a displacement of less than 2mm. We may not have the best-looking, or the lightest. But we broke the egg easier than anyone expected us to- a true underdog story.

Team Empire

Team Members: Yee ho Song and Kunsoo Yuk

Crusher Weight: 85.93g

Design and Results

Team Empire's crusher was designed to be reliable, precise, and reusable.

The crusher stood as a tower, with only its topmost load-center viable to folding. The main tower's sturdiness could be attributed to the use of four pieces of double corrugated cardboard. This acted as an extension of the bottom platform and sturdily held the bottom of the egg at a constant height. Then the topmost load center would collapse with the movement of the upper platform, allowing the egg to be promptly crushed.

Though simple, the tower-like design allowed for very reliable and precise crushing. Height of the main tower could be adjusted by adding pre-made slips of cardboard to its base; the egg could be made to immediately feel force from the compressing platforms. Hence, the tower could be adjusted to precisely crush any sized egg. In fact, Team Empire was among the last of the groups to select an egg, and even then was able to crush the egg within a mere 2.5mm (refer to graph). This places Team Empire's design as the third best crushing distance between both material science classes. Team Empire believes this feat could promptly be reproduced for eggs of very different sizes.

Also, Team Empire's crusher was not deformed at the end of the crushing. The four corrugated pieces of cardboard that provided the main support of the structure did not show any signs of wearing; the crusher is very reusable.

Though Team Empire's egg crusher weighed in at a hefty 85.93g, it was the more adjustable of its peers. Hence, Team Empire believes that its weighty design is overcompensated for by the capacity to easily and precisely crush varyied eggs.


After prototyping, Team Empire designed the cutouts on AutoCAD. These cutouts were then laser cut and put together using slits in the cardboard pieces. Hence, this structure can be easily reproduced.

The largest piece of the structure was an overlying piece of cardboard that held the entire structure together. This was necessary to allow for the structure to accommodate cardboard pieces for height-adjustability.

Team MAC: Nicholas Mitchell, Tensae A., and David Chen


With crusher mass of 91.1 grams.

Although we did not crush the egg, we believe in the sentiment of “When life hands you lemons–don't make lemonade. Make life take the lemons back! (Cave Johnson)” Also, by fact that we have an iconic red lunchbox on our team, how can it be said that we lost?


Team Members: Andrew Tallaksen, Kevin John, and Tyler DiStefano

Crusher Weight: 27.8114g

Our team won the egg crushing competition because the weight of our crusher is significantly lower than the other teams'. Even though our mechanism crushed an egg within 6.5 mm (considered the average), the significant fraction in weight comparatively is by far one of the lightest.

Our design was easy to construct, and took very little time to assemble. Our crusher also was relatively lightweight, but did not buckle under the applied force.

start/classes/materialsscience/eggcrush/start.txt · Last modified: 2012/09/28 23:36 by kyuk
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