Recent content by ozzolins

  1. O

    Calculating Rivet Pitch for Plate with 2500 N Load and 0.8 mm Thickness

    Please, anyone? Still trying to find out where my mistake is.
  2. O

    Calculating Rivet Pitch for Plate with 2500 N Load and 0.8 mm Thickness

    Exactly, I need max possible spacing between rivets for attaching stringers to the plate. Sorry, yeah, that was a stupid typo. :D
  3. O

    Calculating Rivet Pitch for Plate with 2500 N Load and 0.8 mm Thickness

    Well, we have some restrictions for this project so we decided to use two ribs (in the middle) and 8 stringers - in the corners between plates and 2x2 stringers on top and bottom plates as shown in picture. Box ends will be open, so no plates there. But still question remains.. How to determine...
  4. O

    Calculating Rivet Pitch for Plate with 2500 N Load and 0.8 mm Thickness

    Ok, I kind of gave you misleading info. I forgot to mention that in grey areas rivets cannot be placed because this box will be put into bending machine and in these places it will be clamped. Furthermore, there will be stringers inside the box and rivets will be bolted through them (so in...
  5. O

    Calculating Rivet Pitch for Plate with 2500 N Load and 0.8 mm Thickness

    Here are the calculation steps: https://imagizer.imageshack.us/v2/585x597q90/30/0jso.png [I hope the step where I calculate area is straight-forward, it's just basic geometry] E modulus was given in 72400 MPa, but it's the same as 72400 N/mm^2 right?
  6. O

    Calculating Rivet Pitch for Plate with 2500 N Load and 0.8 mm Thickness

    Hi guys! I have assignments and we are trying to get to reasonable value for more than 2 days and still nothing... Okay.. problem is: https://imagizer.imageshack.us/v2/705x238q90/191/6qqd.png picture of the plate: https://imagizer.imageshack.us/v2/412x395q90/835/7u81.png F =...
  7. O

    What is the magnitude of force vector?

    Now the diagram is correct. Still can't figure out magnitude of F2.
  8. O

    What is the magnitude of force vector?

    Why do you think it's 58.264N? I made a mistake writing it down in the first post. This is only part of exercise. There was resultant moment given of 115 N*m, and distance between Fr and point O (where this moment happens) was 0.575 meters. So I divided 115 by 0.575m and I got resultant force...
  9. O

    What is the magnitude of force vector?

    Unknown F2 value. I came down to: 199.9 = √(0.6x+86.6)2 + (0.8x + 50)2 Though, I can't (don't know how) solve this equations. NB! I made a mistake and resultant force is 199.9 N.
  10. O

    What is the magnitude of force vector?

    I know that, but it's a bit more complicated due to the fact that for these forces I need to find x and y components first.
  11. O

    What is the magnitude of force vector?

    1. Determine the magnitude of F2 2. How can I find this one force if I know resultant force and other force? Never done this before, that's why I've no idea. 3. Sorry, I have none.
  12. O

    Finding magnitude and directional sense of resultant moment

    I would say around z-axis. I don't know why but I somehow don't see the "big picture" of moments. Then Ga is positive and Gw in negative, which leads us to: ƩMo = 110kg*9.81*2.5 - 275kg*9.81*0.5 = 1348.875 N*m = 1.35 kNm ?
  13. O

    Finding magnitude and directional sense of resultant moment

    Can you please explain about these coordinates? I'm not sure how to determine whether it's positive or negative. And maybe some example how to solve this exercise?
  14. O

    Finding magnitude and directional sense of resultant moment

    Do I understand correctly that I need to find resultant moment which is measured in N*m units? 1. The railway crossing gate consists of the 110-kg gate arm having a center of mass at Ga and the 275-kg counterweight having a center of mass at Gw. Determine the magnitude and directional sense of...