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  1. zonaguy920

    Stiffness

    Assume a beam with attached rollers (top beam, see attachment) is being supported by another beam that is simply supported (bottom beam). I want to ensure the top beam does not get overstressed due to bending because the bottom beam is not stiff enough. Is it enough to assume that the EI value...
  2. zonaguy920

    Need help selecting an electric motor

    Good consideration about the hoist line. I plan to use 7/8” 6x36 class wire rope (79600lb) breaking strength. I think up to a 5% off nominal velocity will suffice. If however I did need more accuracy with speed control, I could introduce a VFD? I’m assuming the use of a limit switch to stop...
  3. zonaguy920

    Need help selecting an electric motor

    A hydraulic solution would still require the use of a motor and a pump though, correct? Might be a more logical solution, but not sure if it would be cheaper. The duty cycle would only be a few seconds, and the plan is to perform around 20 cycles (probably 30 min between cycles). Looking at...
  4. zonaguy920

    Need help selecting an electric motor

    Hello, I have no experience working with electric motors, and I need some help selecting a motor to meet my requirements. Any help would be greatly appreciated. See the attached JPEG for my simplified setup. Requirements: The motor must pull the load at a constant designated velocity of 100...
  5. zonaguy920

    Fastener Loading question

    Tmoose, I see what you're saying, thanks for the response. As I've set it up, yes it's indeterminate with the three unknowns. I tried making a conservative assumption and say that R1 (bolt furthest from the ledge) will take all the load. This way, if my safety factors look good I don't need to...
  6. zonaguy920

    Fastener Loading question

    I have two bolts mounting a member to a fixed support (pictured in gray), where my load P is known. I'd like to use an "overhanging load" scenario where R_1 and R_ledge are my two reaction loads, except I have that 2nd bolt R_2 which complicates this a bit. I would assume that R_2 is going to be...
  7. zonaguy920

    Flat Rectangular Plates. Roarks

    I have a steel weldment with a wide top plate that will need to bear some significant load, F. Not sure if I'm okay to calculate my max stress as a simply supported beam, or if I should use Roark's formulas to calculate as a flat rectangular plate (although I would assume the latter). My a/b =...
  8. zonaguy920

    Bonded Standoff in Aerospace application

    Hello, Does anyone have any experience using Click Bond products? I'm trying to find info for CB3201 (standoff, locking thread, very large base). For spec sheet go to: http://www.enfasco.com/clickbond/PDF/cb3201.pdf I'll be using these standoffs along with p-clamps to support cables in a...
  9. zonaguy920

    Simplify combined loading case?

    Thank you motorcity. So Mz will create a force couple in tension (Mz/a), Mx will create a force couple in shear (Mx/a), and My will result in a 0 force couple. Does this sound correct?
  10. zonaguy920

    Simplify combined loading case?

    What's the best way to go about determining shear and tensile loads in two bolts of diameter D that fix the two segments together -- where I have known forces and moments acting in the X, Y and Z planes (all with different magnitudes). Is there a way to simplify this? Thanks

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