Bent Plate Residual Stresses 1

[Hadeer Salah]

I’m working in a project with angles connections as shown in the attached file, but due to material shortage I’m forced to use bent plates (Shape A or Shape B).
So, I’m asking about the residual stresses in the bent plate in case of using Shape A or Shape B and how to check it?


Hadeer

 

[DrZoidberWoop]

Here is an old thread from this website with some thoughts on bent steel.

https://www.eng-tips.com/viewthread.cfm?qid=106914

Here's an old paper I found really quickly.

https://ir.nctu.edu.tw/bitstream/11536/4230/1/A1990CH80000003.pdf

There is a lot of information out there on the topic of bent plates.

In practice, the biggest issue I've had with bent plates has been ensuring the inside bend radius is sufficiently large, to avoid damage/rupture during cold bending in the brake-press. Every fabricator will cold bend plates a little different because gauging the spring-back and achieving the proper final shape is a bit of an art form.

 

[dik]

Thanks, Doc... whazzup...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[DrZoidberWoop]

Not too much. Funny thing about bent plates, we have so many f***ed up ones laying around the shop/office that we use them as door stops. ha.

 

[dik]

It was a "Whazzup Doc" reference...

Can you use them as bookends? When I worked at DB in the summer in the galvanising shop while going to university... I had a couple of 3" slices of an L 8x8x5/8 angle that I galvanised. They were bookends. Interesting thing was that when I put them on the dryer after 'fluxing' them, I had two several thousand pound loaded racks collapse on either side of me... From the way the racks were loaded then fell in a linear fashion. I guess they were unstable and the little vibration from walking between them I guess caused the first to collapse, then the other... I was safe... had a foot or so on each side.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik