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Recent content by Sean99

  1. Sean99

    Free beam maximum moment problem

    rb1957, thanks for your response, good point. Ng2020, also very good points. OK GUYS, I THINK IVE GOT IT NOW, I'm officially closing this thread, or at least the OP, which is me, is no longer going to be responding. Thanks for everyone's contributions, it's quite clear to me now.
  2. Sean99

    Free beam maximum moment problem

    Snickster, thank you for your response. What you've said makes sense to me and I'm glad I did what you suggested right in the "snicksters way" page. However, if we only have 11 N available for acceleration, I don't understand why then the summation of downward forces to calculate the total...
  3. Sean99

    Free beam maximum moment problem

    LiftDivergence, thanks for your comment, ill look into it. 3D Dave, right you are. What you're saying only applies to my own analysis and not the page titled "Snickster way" correct?
  4. Sean99

    Free beam maximum moment problem

    the other photo with my assumption- Jboggs, I think swcomposites question offered nothing and was an insult in and of itself. Maybe you'll forget the integral to sin(x) and youll ask me, and I'll say "didnt you ever take a calc class?? its one of the first integrals you learn in calc 2!" Also...
  5. Sean99

    Free beam maximum moment problem

    Hello Snickster, I tried your method, please see the two photos I've attached. I did it in two different ways, the way you explained with the resulting forces being equal to 20 N downwards didnt make much sense to me, or maybe it did with that law, all actions have an equal and opposite...but I...
  6. Sean99

    Free beam maximum moment problem

    desertfox, I guess You're right, this isn't so simple. I was thinking too much about a similar problem- solving for the maximum moment on an aircraft wing, which can be simplified into a cantilever beam. Well thanks for pointing me in the dynamics direction. hydtools, thanks for your response...
  7. Sean99

    Aluminum plate welded to aluminum plate section modulus

    You're right, I keep reading that in various place, if two pieces of the same material deform together then they're basically the same piece. I'm looking into the beam analysis of a tailsitter with two motors, could you take a look at my other post that relates to this? It would be a huge...
  8. Sean99

    Free beam maximum moment problem

    Hello All, I'm trying to figure out the maximum moment for a free beam that has a few forces on it. It's meant to model a tailsitter aircraft that has two motors producing thrust on the ends of its main spar. The idea is to understand the maximum moment on the main spar. Please review the...
  9. Sean99

    Aluminum plate welded to aluminum plate section modulus

    Actually wait! I have one more question. What if you didn't weld directly around the perimeter, but instead welded a perimeter smaller than the total height and width of the second plate like in this new photo attached? You wouldn't be able to then consider it as one piece then right...
  10. Sean99

    Aluminum plate welded to aluminum plate section modulus

    Thanks for your response. Can you tell how it is you know the answer to the first question is true? Some kind of proof? I want to know the why of it.
  11. Sean99

    Aluminum plate welded to aluminum plate section modulus

    If two plates of Aluminum (both are 2" tall, and 1/2" thick) were placed over each other (see photo 1) and then welded together all around the perimeter of the second plate (the blue one) as indicated by the yellow lines in photo 2, then would the moment of inertia be calculated as if the local...
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