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For the following joints (images) describe the forces and failure modes of the bolted connections. Why is pretensioning the bolts important? What would fatigue failure look like for the bolted connections?
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1
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1901
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August 12, 2021
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Can you apply MMC to a profile of surface call out in GD&T?
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1
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1856
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August 12, 2021
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You have a bench (image), where would you sit to maximize the reaction force on one end?
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2
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1562
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August 12, 2021
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The buckle on your backpack is breaking. How would you redesign the part to ensure this doesn't happen?
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1
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2739
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August 10, 2020
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If you're on a spaceship and want to throw out garbage outside such that it will propel you outwards, which direction do you throw the garbage?
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1
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1320
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July 31, 2021
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Given an adjustable crescent wrench, which cross-sections would you use for different parts of the wrench?
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2
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2490
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July 31, 2021
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If you have a cantilevered beam with one end fixed to a wall and the other end free, and there is a moment acting on the free end, where will the beam fail?
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1
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1907
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July 31, 2021
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Garden hose has stopped flow. There is constant static pressure and no water hammer. Why does hose have tear in axial direction at the end of the hose?
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1
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1288
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May 6, 2021
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How do you calculate the correct sample size for reliability testing?
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3
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15927
|
April 15, 2021
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Given a point-load at the end of a wall-mounted cantilever beam, what is the shear stress at the wall?
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4
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4027
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April 5, 2021
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What's the optimal size rock to throw if you want to throw it as far as possible?
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1
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3567
|
February 10, 2021
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When you use the front brakes on your bicycle, why does your body want to rotate over the front wheel?
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1
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1735
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January 13, 2021
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When is a screw better than a nail and the reverse question?
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1
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3060
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November 13, 2020
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What are the equations of motion for a mass-spring damper system?
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1
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3155
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October 4, 2020
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What are the key components in a consumer electronic laptop?
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2
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2529
|
October 3, 2020
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What sensors are used in an Xbox Kinect? Explain how these sensors work and why are they are used
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1
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1481
|
October 3, 2020
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If I have sealed tubing subjected to its maximum pressure rating, where would it fail and why?
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1
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2513
|
October 3, 2020
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A floating helium balloon is in the backseat of a car. If the car accelerates forward, which direction does the balloon float and why?
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1
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4292
|
August 4, 2020
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How can you reduce moisture absorption in nylon?
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1
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4140
|
September 28, 2020
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How do the strength-to-weight ratio of aluminum vs. steel compare?
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1
|
4816
|
August 7, 2020
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What graph would you look at to see whether a material would fail from long-term exposure to vibrations?
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1
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4272
|
September 11, 2020
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What are design for manufacturability (DFM) considerations you would assess while designing an injection molded part?
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1
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2295
|
August 8, 2020
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What are some differences between aluminum and steel in terms of material properties?
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1
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1622
|
August 6, 2020
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Is a laminar or turbulent boundary layer better for heat transfer from the surface to the environment?
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1
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2368
|
August 5, 2020
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What is the difference between stiffness and strength?
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1
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7305
|
August 5, 2020
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You are in a rowing boat on a lake. A large heavy rock is also in the boat. You heave the rock overboard. It sinks to the bottom of the lake. What happens to the water level in the lake? Does it rise, fall or stay the same?
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1
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7935
|
July 27, 2020
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Label and describe the key points on a stress-strain curve
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1
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10346
|
July 27, 2020
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