Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: Tomfh
  • Order by date
  1. Tomfh

    Manager Says Keep the Restraints — I Think They’re Unnecessary. Who’s Right?

    I'm confused by the structure? Do those blue arms cantilever off the post? Are you proposing to have the post as a cantilever?
  2. Tomfh

    Slab on grade on High Density Foam

    When checking bearing also check it doesn’t deflect too much under that load, as you don’t want to punch or yield the slab prior to mobilising the foam or subgrade. If it does need to deflect to mobilise the capacity of the foam or subgrade then check the slab can tolerate that.
  3. Tomfh

    T-Bracket Beam Analysis

    4/3 F
  4. Tomfh

    Learning Structural Connection Types – Pin vs Fixed (Real World Example)

    It would lean if it wasn’t fixed. In terms of details, bolts positioned outside the section to provide large lever arm to resist bending force within the connection, as well as stiffener plates
  5. Tomfh

    Learning Structural Connection Types – Pin vs Fixed (Real World Example)

    Designed as fixed. In reality, not fully fixed, but close enough.
  6. Tomfh

    Paradoxical strut-and-tie tests (less = more)

    That’s really interesting. It would never have occured to me that it would be such a drastic difference, even with so much concrete removed. Seems a bit like a stress riser type situation, where you can drill a hole to interrupt the nastiest stresses and cracks in metal, which I believe is...
  7. Tomfh

    Cracking in Wood Joists

    If they’re cracking and they don’t work easily I’d be sistering.
  8. Tomfh

    Steel-to-Steel Fastening with total thickness greater than 1/2"

    For that size plate bolt or weld
  9. Tomfh

    Attachment to Existing Terra Cotta

    What application?
  10. Tomfh

    Interesting ponding/deflection problem

    Very useful. I’d been wrestling with it intuitively. Really interesting that it’s an instability problem with a "buckling" type solution. Well done, Bugbus, for getting to that insight on your own.
  11. Tomfh

    Thread embedment required for bolt in tension

    Codes often require at least one thread beyond the nut. One thing I've noticed in practice is that if a nut and bolt aren't well machined that the nut can slip anyway, yielding the threads before yielding the bolt.
  12. Tomfh

    Spain and Portugal power grid collapse | Report Released

    It’s only fair, Greg. The synchronous condensers replace the inertia of those “dirty” fossil fuels and it’s those dirty fossil fuels that should pay! 😉
  13. Tomfh

    Spain and Portugal power grid collapse | Report Released

    Jittery renewables, like we didn’t know.
  14. Tomfh

    Titan sub noise heard on board support ship.

    The weave is bidirectional, like shirt fabric, designed to resist both hoop and axial stresses. That said, the cylinder didn’t rely on the domes for buckling restraint, the domes merely capped the ends and transferred axial load into the hull. Still, the strain mismatch at the junction, where...
  15. Tomfh

    Titan sub noise heard on board support ship.

    Yes, the joint is a question mark and might’ve contributed. But we’ve got clear evidence the carbon fibre hull was cracking badly, and those cracks were getting worse with every dive. That’s not speculation, that’s documented. The previous hull was cracking to pieces, far from the joints. So...
  16. Tomfh

    Titan sub noise heard on board support ship.

    Agree. Cyclic testing is what it needed in my view. Cycle the pressure thousands of times and see what the cracks do. They’d actually already done that indirectly with the first hull; but turned a blind eye by the looks of things to all the horrible cracking that was occurring.
  17. Tomfh

    Titan sub noise heard on board support ship.

    I think the documentary glossed over the design and development process a little. It made it seem like, after a few early test failures, Stockton Rush jumped straight into a full-size sub. But if you look closely, those early failures appeared to involve failed carbon fibre end caps. Presumably...
  18. Tomfh

    Titan sub noise heard on board support ship.

    A fair assessment. For all the valid criticism Stockton Rush cops, playing Russian roulette with peoples lives, I can’t help but feel some level of admiration for him. Utterly reckless, but bold in a way most people just aren’t.
  19. Tomfh

    Air India 787 crashes on take off

    How does that kill the plane stone dead?
  20. Tomfh

    Air India 787 crashes on take off

    If the engines failed (bird strike or whatever), then why radio silence so shortly after the incident? Something must have gone on with electrics?

Part and Inventory Search

Back
Top