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bending

In applied mechanics, bending (also known as flexure) characterizes the behavior of a slender structural element subjected to an external load applied perpendicularly to a longitudinal axis of the element.
The structural element is assumed to be such that at least one of its dimensions is a small fraction, typically 1/10 or less, of the other two. When the length is considerably longer than the width and the thickness, the element is called a beam. For example, a closet rod sagging under the weight of clothes on clothes hangers is an example of a beam experiencing bending. On the other hand, a shell is a structure of any geometric form where the length and the width are of the same order of magnitude but the thickness of the structure (known as the 'wall') is considerably smaller. A large diameter, but thin-walled, short tube supported at its ends and loaded laterally is an example of a shell experiencing bending.
In the absence of a qualifier, the term bending is ambiguous because bending can occur locally in all objects. Therefore, to make the usage of the term more precise, engineers refer to a specific object such as; the bending of rods, the bending of beams, the bending of plates, the bending of shells and so on.

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  1. D

    21.5mm pipe bending.

    Now with the increasing amount of 21.5mm condensate plastic pipe being fitted. Has anyone mastered the art of bending it with simple on-site tools; gas torch & bending machine perhaps?? Can I have your views please.
  2. P

    Speedfit Pipe Bending

    Hey, has anyone used the black cold forming bends that John Guest Speedfit supply? Running a bathroom refurb in Speedfit. Only used it a handful of times with a previous 'builder' who believed you could twist speedfit all over the place, not pipe clip it for support and use connections like...
  3. P

    Bending 12mm copper pipe (half hard)

    Any one know of any benders for these? All the ones i have found are for soft copper?
  4. G

    Bending soil pipe

    I'm trying to push a toilet back against a wall so that the cistern is flat against the tiled wall, but the 110mm soil pipe is slightly out of position by about 1.5 inches so I thought I could bend the soil pipe slightly by heating it (tried a hot hairdryer but no good) - any ideas please very...
  5. M

    first time fitting urinals

    Hey am working on a commercial project at the momment, usualy work on the domestic side of plumbing. So this will be the first time I have had to fit urinals just wonderd if anyone had any advice about fitting them? Got any tips etc, are they held on brackets? and does the chrome pipe that...
  6. P

    pipe bending

    at college 2night,, the fella who looks after the stores(big tony),, showed me a different way of bending copper pipe..... for 15mm copper u measure 70mm back from the measurement given and line that up with the back of the former... he said there's a mesurment back for 135 Degrees but he...
  7. B

    new oldstock record benders

    on the bay Pipe Bending Machine 22,15,10 and 8mm | eBay
  8. I

    Copper bending methods?

    Hi all, I learnt some copper bending methods on the olci course and I've forgotten them and getting access to the course material is impractical at the mo. been searching online but havent been able to find those actual methods. Does anyone have a link to them by any chance I was wondering? Been...
  9. J

    Bending Coated Copper.

    Does the plastic coating have to be cut off to bend coated pipe or is it possible to use a slightly larger former to achieve a tight radius?
  10. A

    New Pipe Bending Marking Up Tool

    There's a novel tool being demo'd on You Tube, for marking up 15mm copper pipes for bending in a hand bender. It might be useful for inexperienced or infrequent pipe benders :icon9:, or for those who just aren't so good at accurate bending 'by eye'. :wacko: Naturally all you dab-handed...
  11. R

    Bending 15/22 mm copper pipe - how do you measure it?

    Dear Friends Just thinking about things! If you have a piece of 15mm copper pipe 500mm long, and you need to bend it at say 300mm to go around a corner (90 for arguments sake), how do you do it? i.e Do you measure 300mm along pipe, put pipe in bender, 300mm mark aligned with edge of former...
  12. G

    WANTED Pipe bending machine on stand

    Anyone selling a full size bending machine, not a hand bender as I need a spare one for other jobs. Looks not important but obviously operating condition must be good. Postage included to Bonnie peeing in the rain Scotland with price. Cheers all.
  13. G

    Useful ap for bending offsets

    Anyone who has a iphone might like this little ap. It calculates the measurement for bending a pipe offset. Bit gimmicky, but we can never have enough aps and who knows it might help a few students.... App Store - Pipe Offset Calculator
  14. J

    Bending 28mm

    Hi all, does anybody know the ways to bend 28mm copper, is it only using hilton pipe bender stands or is there another way, mechanical/ hydraulic?
  15. S

    Passover bending

    Hi Im still on the very basics at the moment so please bear with me. Ive attached a picture (below) on what im trying to explain and work out so im hoping that is going to help someone answer me. Ignoring the radiator feed and return, just look at the hot and cold. Im not bothered about the...
  16. S

    Pipe framework plans for bending and soldering.

    I need to practise bending and soldering but don't want to waste the pipe. Then had a brilliant idea. I need a stand for a couple of VCR players and a Sega Saturn. Yes I know they're old but I still use them and they're fun. I was originally going to use 3/8" ply, then to hide the joins at the...
  17. P

    Copper Pipe Bending

    Hi, Can anyone help? I am using a new Heavy Duty Pipe Bender and the 15mm pipe is throating/rippling. I am putting the guide on so I can't see where I am going wrong. :banghead: Thanks Sue
  18. R

    Bending copper pipe

    Does anyone measure copper pipe with string? If so, how do you do it?
  19. P

    bending 32mm plastic

    ive got a very awkward joint, trying to connect bottle trap to a 32mm plastic pipe coming in from outside soil pipe ive tried using flexi but to long and i dont want to buy the 32mm flexi pipe from bes £28.00 from B.E.S because it eats into profit and i doubt if ill use it often so can i bend...
  20. V

    Chrome pipe work

    Hello, I am about to install a new central heating system. Customer has specified chrome pipework for exposed pipe. I have nevered worked with chrome before and looking to get soe pointers on how to handle, solder, joined, bend and install it? cheers DD368
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