https://www.bweizer.com/about daily 0.75 2025-03-26 https://www.bweizer.com/resume daily 0.75 2026-02-04 https://www.bweizer.com/skills-awards daily 0.75 2023-10-25 https://www.bweizer.com/home daily 1.0 2026-02-02 https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/1a932dfa-3382-4f0c-8899-16f4d67ac6e7/IMG_2449.jpeg Home Photo by Steph Stevens https://www.bweizer.com/home/light-fixture monthly 0.5 2021-12-21 https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/98c7f591-5951-44fe-866a-405b284c74fc/Original_Fixture.png Home - Lithophane Light Fixture - The Problem We were approached by the US Special Operations Command (SOCOM) to make new light fixtures for their lobby. They asked for something that could show the SOCOM logo through the light. Shown here are the original light fixtures from the lobby. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/d2f2565b-7cfc-4756-980c-8f3f57ce7414/CAD+Pic.png Home - Lithophane Light Fixture - CAD Prototype From previous hobbyist work I did with 3D printing, I had the idea to make a lithophane insert that could be put into the light fixture. Pictured here is the CAD done in Solidworks. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/a02ff44c-bfb9-42cc-8f71-29872b68982c/Prototype.png Home - Lithophane Light Fixture - Prototype In this lithophane, certain areas are made of thicker material than other parts. Then when a light is shone through the lithophane the thicker parts appear darker thus allowing an image to be created. This small prototype helped me pitch the idea to my supervisors and test different thicknesses and orientations for the final part. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/7b7ff9e7-fa0a-49ca-9869-aa9dee4be836/Photo+Dec+17%2C+12+50+20.jpg Home - Lithophane Light Fixture - Final Part Delivered Four of these final inserts were made and put into the original light fixtures (which got painted black). They are now on display in the US Special Operations Headquarters. This picture was taken 4 months after the fixtures were installed showing that the lithophanes have held up to the heat from the lights. https://www.bweizer.com/home/film-rewinder monthly 0.5 2021-12-20 https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/1637855965503-Q3NF2YTY6Z92BZ9S078I/IMG_1321.jpg Home - Film Rewinder - Make it stand out I was given the metal box and I made the two, 3D-printed posts and all of the electronics. On the right post, the reel is attached to a motor that could spin in either direction depending on the orientation of the film. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/5d5acfe1-25c8-4b00-a1a2-88f0e5e0f453/Rewinder+Right+Post.png Home - Film Rewinder - Motorized Mount Hubs to hold the reels were 3D printed. This hub was mounted onto a DC motor and also acted as a coupler for a threaded rod. Threads were added to the knob which was then screwed onto the rod to secure the reel. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/cd34624f-9970-4257-a60a-acaea25f7e0e/Rewinder+Left+Post.png Home - Film Rewinder - Free-Spinning Mount For the other post, ball bearings were press fit into the post to reduce friction and a screw was placed inside. Another 3D printed reel hub was mounted on the screw and a threaded knob was attached. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/e7bcc309-8ff6-42f4-817f-411b02586c97/IMG_1325.jpg Home - Film Rewinder - Electrical To allow the motor to change speeds, the system was powered with a variable power supply so a dial on the AC adaptor controlled the speed. At the bottom of the post, there was an On/Off switch and another switch to control the rotation direction. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/476ed7e5-57c1-45bd-b7d7-b97d12258dbb/IMG_1328.jpg Home - Film Rewinder The whole system was able to come apart and fit inside the box for easy storage. https://www.bweizer.com/home/2008yoyo monthly 0.5 2021-12-20 https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/b74d8c40-e123-480d-a65e-02feaf59b306/Design+Proposal.jpg Home - Yo-yo Project for MIT 2.008 Design and Manufacturing II - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/4282d7d9-5e96-46c1-8ee4-9ac95f7fab7e/Design+Proposal+%281%29.png Home - Yo-yo Project for MIT 2.008 Design and Manufacturing II - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/e9a3736f-3c75-4ca0-9a27-b7c91338a839/Photo+Oct+21%2C+12+31+34.jpg Home - Yo-yo Project for MIT 2.008 Design and Manufacturing II - The First Part We Injection-Molded The first part we injection-molded! This part is an injection-molded outer shell. The hole in the middle fits another part with an “8” printed on it for the 8-ball. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/5189096f-3de6-4b72-979d-9e4e70aba6a1/My+project.png Home - Yo-yo Project for MIT 2.008 Design and Manufacturing II - 3D Printed Thermoform Molds To make the thermoformed parts, I 3D-printed molds with a high-temperature resin. I then put the molds on a lathe to add features such as a lip for the part to sit in the cutting die, a thinner top to press-fit into another part, and smooth tops to prevent layer-lines from appearing in the final parts. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/e2ecaebf-2c2e-400c-98d6-8ce6e08c51c1/Photo+Nov+23%2C+14+48+32.jpg Home - Yo-yo Project for MIT 2.008 Design and Manufacturing II - Thermoformed Parts For a window, we used a clear plastic sheet to mold the part and then cut it out with a die. For the other part, an “8” was printed in the center of a white plastic sheet which was formed around the mold and then cut out with a die. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/b3f82db9-0195-4692-925c-f5e8ee6bc9d5/Photo+Nov+05%2C+17+09+12.jpg Home - Yo-yo Project for MIT 2.008 Design and Manufacturing II - Final Yo-Yo: 8-Ball On the other side, the yo-yo had an “8” printed on a white circle to give resemblance to a real 8-ball. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/c68402fb-8fe7-4d06-b799-75f77fa82a41/Photo+Nov+05%2C+17+09+13.jpg Home - Yo-yo Project for MIT 2.008 Design and Manufacturing II - Final Yo-Yo: Fortune Wheel The final yo-yo had a window where the user could read the answer to their question. Inside, a spinning wheel behind a clear window spun so a random answer was given each time. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/c18b7f3a-1dd8-4727-828f-7ecd2e718f26/Photo+Nov+11%2C+10+41+44.jpg Home - Yo-yo Project for MIT 2.008 Design and Manufacturing II - Production Run of 50 Yo-Yo’s https://www.bweizer.com/home/sieve-shaker monthly 0.5 2021-12-20 https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/7ccd0731-4c20-4ebf-aef1-0cc3bdec31f6/CAD.png Home - Sieve Shaker - CAD Model Using Solidworks CAD, I designed this frame that used a vibration motor we had in the lab from a previous project to shake a stack of standard sieves. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/a92a86f4-a9b1-41c4-9966-e476fc338fdf/Photo+Nov+30%2C+16+57+27.jpg Home - Sieve Shaker - Frame The frame was built with 1” 80/20 Aluminum. I decided to use 80/20 because we had substantial stock in the lab as well as the hardware compatible with the 80/20 system. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/5776d71d-8f59-4ac2-8cfc-f381416b2dc8/Photo+Dec+09%2C+16+57+51.jpg Home - Sieve Shaker - Final Design The final product held a stack of 4 sieves plus the bin that captures the remainder of the grit. Vibration feet screwed into the bottom isolated the vibrations from the table as well as allowed the height to be adjusted to level the sieve stack. The inside of the frame was lined with a soft mat to prevent the stack from rattling against the frame. In the final design, the lid was substituted out for tabs to allow for more adjustability. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/bf5f0544-07f6-4083-806b-4b481a2c25e8/Photo+Dec+13%2C+17+12+37.jpg Home - Sieve Shaker - Sorted Grit Using the shaker, I was able to recover more alumina grit in less time compared to shaking the sieves by hand. The switch to the shaker also drastically reduced my physical fatigue in sorting the grit. https://www.bweizer.com/home/2007robot monthly 0.5 2021-11-09 https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/1636429758452-Y422Z13C1SDKVMSIWR5V/Weizer+Colby+Jack+%282%29.JPG Home - Robot for MIT 2.007 Design and Manufacturing I This robot was made for the class 2.007 Design and Manufacturing I. We were given a kit of hand tools and materials to construct a robot to complete a variety of challenges on a game board. It was controlled with a radio controller for manual control and an arduino for autonomous functions. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/dd865f17-8e70-43b3-8cf1-81646d26f612/My+Post.png Home - Robot for MIT 2.007 Design and Manufacturing I - CAD Progression Mocking up the robot in CAD allowed for rapid iteration and checking of its geometry without having to make the parts. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/c31eec57-aa21-44be-b207-4292a3cd88de/MCM.png Home - Robot for MIT 2.007 Design and Manufacturing I - Most Critical Module (MCM) To do most of the tasks, an arm with different tools were attached. The pivot for the arm was mounted high and pivoted up allowing it to quickly extend over 13” above the ground while fitting inside of an 8” box. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/55c8ff7e-258a-4d84-a9d2-f2b323e58139/Hook.png Home - Robot for MIT 2.007 Design and Manufacturing I - Multiplier Ring Hook A ring was connected by a string to a cowbell and spring such that when the ring was pulled it would raise the cowbell and extend the spring. Depending on how high the cowbell was raised, a score multiplier was added. Using a piece of welding rod shaped into a hook, the robot was able to pull the cowbell over 5” to the max height where the spring was exerting 5 lbs of force. It could perform this task in about 4 seconds, faster than any other robot in the competition. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/51d12922-f94e-4b50-a998-33cd29ed5597/Pic_Final.JPG Home - Robot for MIT 2.007 Design and Manufacturing I After 2 days of competition against 120 other students in the class, my robot and I emerged with the third place trophy! https://www.bweizer.com/home/computer-case monthly 0.5 2021-12-21 https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/ecfee079-3737-43a3-8e48-a87766dac745/Photo+Jan+19%2C+16+22+48.jpg Home - Miniature Computer Case - The Problem I was asked to design and 3D print a custom computer case for a credit card PC with some attachments and a fan. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/ebf954d3-5aaa-437a-a98d-3df691077a55/Photo+Jan+22%2C+12+25+32.jpg Home - Miniature Computer Case - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/621ee7b6-24d8-4eff-b357-124a5b4638fe/Photo+Jan+22%2C+12+24+15.jpg Home - Miniature Computer Case https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/3b421f85-1f7f-4d55-84a1-c1171a9b659d/Photo+Jan+22%2C+12+25+43.jpg Home - Miniature Computer Case - Friends, Family, Fish. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/3d5e15ac-d233-4d67-98e8-dfd646741cf8/Photo+Feb+10%2C+13+41+29.jpg Home - Miniature Computer Case https://www.bweizer.com/home/flashlight monthly 0.5 2021-12-21 https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/1640111852704-QI0JAYZNZTVWGJRW5Y2O/Photo+Feb+17%2C+13+48+46.jpg Home - Flashlight - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/5ed8b201-d49f-4a50-9794-316799251fce/Photo+Dec+21%2C+15+28+13.jpg Home - Flashlight - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.bweizer.com/home/dice-box monthly 0.5 2022-10-25 https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/601f0636-760a-4401-86bb-792bc5f58bf7/Photo+Aug+14%2C+13+21+42.jpg Home - Dice Box - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/1e479f45-f098-4aca-bbad-19b81f5aae95/Photo+Aug+14%2C+13+22+09.jpg Home - Dice Box - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.bweizer.com/home/2671-measurement-project monthly 0.5 2022-10-25 https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/1666665219573-THZPA5BZC1G9HHH28JTO/FinalPoster.png Home - 2.671 Measurement Project - Make it stand out Bicycle Rolling Resistance on Surfaces Project Poster https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/d9815fe4-53c3-418e-86c3-9dcd11f246c7/Weizer_FinalPaper2Column_BicycleRollingResistance_Page_1.png Home - 2.671 Measurement Project - Make it stand out Bicycle Rolling Resistance on Four Surfaces Project Paper Page One https://www.bweizer.com/home/stirling-engine monthly 0.5 2023-02-17 https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/ee60a582-bdce-4d92-b0c2-e0f9c0a1d936/017+Crank+Web.png Home - Stirling Engine - Drawings I was given a set of engineering drawings which I used to manufacture the parts for the engine. Since the drawings were old and hard to read, I remade many of them such as this one. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/1666668379509-GWD9VCWJJVKBY7DXQN3W/DSC_0246.JPG Home - Stirling Engine - Final Engine Inspired by my love of motorcycles, I wanted to make a 2-cylinder engine. Many shop hours and machines later, I designed and manufactured a parallel twin Stirling engine. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/26daf129-0834-46da-98a8-9811af5e6265/DSC_0236.JPG Home - Stirling Engine - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/014454af-944c-4c3c-b989-3817e5b6052d/DSC_0239.JPG Home - Stirling Engine - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/272a15cd-1bbc-48d2-a504-bd7aa6e3b35d/DSC_0240.JPG Home - Stirling Engine - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/7522f031-e053-4006-ba22-084e96460073/DSC_0241.JPG Home - Stirling Engine - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/b18a7dd1-8e01-411a-9e56-f118399d8049/DSC_0248.JPG Home - Stirling Engine - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.bweizer.com/home/packable-mannequin monthly 0.5 2023-02-17 https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/ce314ff3-ef5e-4852-9590-d5ce8c4e3ef1/Product+Photo+Crop.png https://www.bweizer.com/home/inlet monthly 0.5 2025-07-02 https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/fca80d85-bc2f-4558-adaf-8a3c21e965e8/ansys+setup.PNG Home - Clog-Resistant Drip Emitter Inlet (Patent Pending) - Environment Drip irrigation emitters are small devices installed inside tubes called driplines that meter out regular flow rates for irrigation. They consist of small geometries that can build up particles (like dirt) and clog, requiring replacement. We thought if we could design an inlet that prevented particles from entering the emitter, clogging could be reduced and lifetime extended. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/68f4e54a-7248-4499-8060-8f98125bd40e/Gill+Arches+Diagram+V3+%281%29.jpg Home - Clog-Resistant Drip Emitter Inlet (Patent Pending) - Nature Inspiration We found that filter-feeding fish have cylindrical structures in their gills that allow water to pass through while keeping small particles in the bulk flow. After brainstorming many ideas, we pursued this one. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/21d4078e-69d4-4882-8abd-ce257c13a0d8/nozzle_side.png Home - Clog-Resistant Drip Emitter Inlet (Patent Pending) - CFD Work While my teammates developed different designs, I ran CFD simulations on their designs so we could iterate on the features and dimensions. My CFD work showed that this design produced horizontal-axis vortices that the literature review showed to be beneficial for filtering. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/d8df2bae-de33-41e0-80c1-52a17f40fff8/AveLineChart+%282%29+%281%29.jpg Home - Clog-Resistant Drip Emitter Inlet (Patent Pending) - Experimental Results We ran experimental tests with a few of our leading designs and found that the “Nozzle” design significantly reduced clogging compared to an industry “Cross Tower” inlet. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/86191a01-922e-4347-9f59-b4518dc80f02/Photo+Jan+07+2025%2C+12+35+04.jpg Home - Clog-Resistant Drip Emitter Inlet (Patent Pending) - Patent Filing We filed a provisional patent with MIT on the inlet design that we hope to convert to a full patent in the summer of 2025. MIT gave me this pin for having a patent filing in progress! https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/e9a94726-1e5a-49c2-847c-e9e056b1cfae/IDTEC_Final_Submission_5_27+%281%29_Page_01Small.png Home - Clog-Resistant Drip Emitter Inlet (Patent Pending) - IDETC Conference Paper First Page https://www.bweizer.com/home/motorcycle-coupling monthly 0.5 2025-07-02 https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/1791bd39-75f0-456c-8eb7-48d558640cc6/Background+Diagram.png Home - Motorcycle Decoupling Project - Background A hydraulic pump was installed onto the motorcycle near the transmission. However, the clutch is incorporated in the torque converter by the engine. This results in the hydraulic pump only getting power when the clutch is engaged, which does not happen if the motorcycle is in gear and not moving. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/73c88986-70d3-436c-9420-c46952138cf2/Proposal+Diagram.png Home - Motorcycle Decoupling Project - Proposal I proposed that we power the hydraulic pump directly off the driveshaft before the clutch, so it has power whenever the engine is running. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/5e8d7595-b5fa-4512-a6d7-448de253c198/FBD+Diagram.png Home - Motorcycle Decoupling Project - Analysis I drew up free body diagrams to ensure that this new configuration would not add more stress to the driveshaft than what it already experienced. By placing the pump opposite the transmission, it actually reduces stress on the driveshaft while running. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/c770be06-01d0-4608-a554-a3f465877bb0/Front+View.jpg Home - Motorcycle Decoupling Project - Experiment I built a mockup of the proposed system to ensure that we would maintain hydraulic power regardless of the drive state, thus ensuring the proposal would function. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/ae88b95b-840c-4c4f-8ab6-c59298e15adf/Spreadsheet+Snip.png Home - Motorcycle Decoupling Project - Design Spreadsheet I compiled all the theory I developed into a design spreadsheet that future users can leverage to test different design parameters on the next generation tractor. The user can quickly test different angles and distances and see if the resulting forces are acceptable for the engine. https://www.bweizer.com/home/compliant-egg-gripper monthly 0.5 2025-07-02 https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/474ac25e-c07b-472c-8fbf-e89dea7e5edd/Functional+Requirements%2C+Approved.png Home - Compliant Mechanism: Egg Gripper - Functional Requirements We developed a set of measurable requirements that our device would need to meet to be functional. These requirements were used as inputs into the mechanical theory to design the device. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/aca583c5-1558-440c-a4c1-90e5aa52309c/IMG_6398.png Home - Compliant Mechanism: Egg Gripper - Mechanical Calculations Once we decided on a general design, I used mechanics theory to determine the stiffness of the design based on the geometry and material properties. This, along with other equations we derived, were compiled in a spreadsheet to guide the design of the gripper. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/75f9812a-9fbc-464d-b012-ad45207a2faa/IMG_6400.png Home - Compliant Mechanism: Egg Gripper - Model “Pressure Test” To ensure the model made sense, we “pressure tested” it by plugging in extreme values to the inputs and testing if the outputs made logical sense. With the model pressure tested, we employed it for the design of our prototype. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/855d6a7b-78dd-47b5-bb15-23073103ca5d/IMG_8115.JPEG Home - Compliant Mechanism: Egg Gripper - Validation with PRBM Part of the purpose of the project was to employ pseudo-rigid body modelling (PRBM) so we could design a compliant, single-piece 4-bar mechanism that mimicked the motion of a rigid 4-bar mechanism with bearings. In this picture, we attached rigid bars with bearings that overlapped the compliant bars. The bearings overlapped where we expected the compliant bars to bend based on the theory. The fact that the overlapping bars can move together illustrates that we applied the modelling theory correctly. https://www.bweizer.com/home/fea monthly 0.5 2025-07-02 https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/10588423-8132-4788-a59c-1255f7ec5c2b/Q3+PEEQ+Whole.png Home - FEA Work - PEEQ in Tension I used Abaqus to simulate a simple tension test with 6061 aluminum to illustrate Equivalent Plastic Strain (PEEQ) in the material. https://images.squarespace-cdn.com/content/v1/6189ecdaa151c83dfda46035/3260ac6b-e0e7-4e93-b9fe-2e31e172f4e4/Q4+PEEQ+Half.png Home - FEA Work - PEEQ in Compression I also used Abaqus to model a cylinder in compression undergoing plastic deformation. The cylinder is interesting because when there is friction, the contact area increases as the sides of the cylinder bend and press down into the plate.