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  1. dav363

    "How to be a star engineer"

    Got it, thanks. Apparently I need to read it again!!
  2. dav363

    "How to be a star engineer"

    About 4 years ago I read an article entitled "How to be a star engineer" which described the best approach to the engineering workplace for a new or graduate engineer to make the best impression. It went into some detail about the qualities of a "star" engineer, who is not necessarily the...
  3. dav363

    Polyethylene Antioxidant levels

    I've been told of a past instance where an MDPE pipeline jacket became brittle and subsequently cracked, requiring the whole jacket to be removed and re-extruded. The cause was said to be related to the antioxidant levels in the plastic. Can someone please provide a quick lesson on...
  4. dav363

    Padeye attached to cylinder

    Ussuri, Can you expand on the sigma p variable in the formula for 'chord end load function' on page 20. As I understand it this is the stress within the cylinder wall caused by all loadings other than that of the joint in question. So in this case where the cylinder is being loaded purely...
  5. dav363

    Padeye attached to cylinder

    Good answer Ussuri, a big mother........ ZCP, The pin of the padeye is at a distance of 150mm from the cylinder face. The load is very significant, 44 Te to be exact. At the moment I'm pretty certain that the moment caused by the padeye will cause buckling of the cylinder wall, therefore I'm...
  6. dav363

    Padeye attached to cylinder

    ZCP, The cables will be attached to a spreader bar so the load will be applied purely longitudinally. The cylinder is 280mm OD, 12.7mm WT. It is 650mm long with flanges at both ends which attach to supporting structures. I see what you mean, take each half of the cylinder as a beam and work...
  7. dav363

    Padeye attached to cylinder

    I've got some tubes and cables encased within the cylinder therefor I can't protrude through the wall as I would clash with these.
  8. dav363

    Padeye attached to cylinder

    Hi all, can anyone shed some light?? I've got a steel cylinder to the sides of which I'm welding 2 diametrically opposing padeyes. The padeyes are attached to steel ropes which are applying a load logitudinally to the cylinder, in other words the load is trying to shear the padeyes from the...
  9. dav363

    Engineering Library recommendations

    Thanks a'body. I've done a few searches on the site now (damn my impatient nature) and have come up with a few good recommendations. There's a few which keep popping up (Roarks, Machinery's to name a couple) so I would assume these are the most popular and hence the most useful. JStephen, I...
  10. dav363

    Engineering Library recommendations

    Hi, I'm in the process of updating the departments engineering library and wondering if anyone can recommend any books/handbooks for inclusion. I'm looking for the sort golden nuggets that people 'couldn't live without'; engineering bibles as it were. The company is a manufacturing plant and...
  11. dav363

    Beam Bending equation

    Hi, I'm trying to find a way of analysing stresses involved in attaching a padeye to the side of a relativly thin-walled hollow cylinder. To do this I've assumed the cylinder to be a flat plate and then propose using standard beam bending theory to calulate the maximum bending moment in the...
  12. dav363

    Bolted Flange under bending

    Can anyone provide a referenced source for a calculation method for assessing stress induced in flange bolts when the flange is subject to a bending moment. I think I'm right in saying one simply takes a moment about a fulcrum point for each of the bolts around the PCD, the fulcrum point being...

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