Internal friction in steel wire rope
Internal friction in steel wire rope
(OP)
Hi folks, I had a class about friction while winding wire rope around a drum. I'll translate (it's in portuguese) and transcript a text about it:
A rope just can wind up around a drum when it takes the drum's shape due to it internal friction appears and it leads a deviation (it can be estimated, see the image 1) between the rope axis and an axis tangent to drum and parallel to the rope axis (Image 2). The main reasons which lead the internal friction are:
1. The compression of rope fiber next to the drum and tension of rope fiber furthest from the pulley
2. Sliding friction between the rope fibers
3. Elastic deformation of the material.
And this friction can be put into numbers by this formula (Image 3) and the amount of force required to wind up it by this another (Image 4). Given this introduction, my question is do you guys know something or meet this theory? I asked it because I was not able to find anything article about it. I think it is important to make you know the author of the book has passed away for more than one decade so the theory can be outdated.



A rope just can wind up around a drum when it takes the drum's shape due to it internal friction appears and it leads a deviation (it can be estimated, see the image 1) between the rope axis and an axis tangent to drum and parallel to the rope axis (Image 2). The main reasons which lead the internal friction are:
1. The compression of rope fiber next to the drum and tension of rope fiber furthest from the pulley
2. Sliding friction between the rope fibers
3. Elastic deformation of the material.
And this friction can be put into numbers by this formula (Image 3) and the amount of force required to wind up it by this another (Image 4). Given this introduction, my question is do you guys know something or meet this theory? I asked it because I was not able to find anything article about it. I think it is important to make you know the author of the book has passed away for more than one decade so the theory can be outdated.




RE: Internal friction in steel wire rope
RE: Internal friction in steel wire rope
RE: Internal friction in steel wire rope
please see section: SECTION 3 MACHINERY AND EQUIPMENT
this too: Link
See the attachment also.
R.Efendy
RE: Internal friction in steel wire rope
Google "uss wire rope engineering handbook" - older stuff, but much useful info. there, multiple sources.
Also the "US Navy Wire Rope Handbook", vols. 1 and 2 (there's a vol. 3 that covers operations and maintenance as well)
Vol 1:
https://apps.dtic.mil/dtic/tr/fulltext/u2/a955305....
and Vol. 2:
https://ntrl.ntis.gov/NTRL/dashboard/searchResults...
RE: Internal friction in steel wire rope
R.Efendy
RE: Internal friction in steel wire rope
And now they are back.
RE: Internal friction in steel wire rope
RE: Internal friction in steel wire rope
Volume 2
Link
Volume 3
Link
RE: Internal friction in steel wire rope