Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Modeling of Cold Pilgering of Stainless Steel Tubes
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Solid Mechanics.
2023 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Cold pilgering is a complex forming process used to produce seamless tubes in terms of modeling due to the complexity in kinematic of tools, friction condition and material behavior. The process development has mostly been based on simple formulas and costly full-scale tryouts. The aim in this study is to develop validated Finite element models of cold pilgering to support design of a robust process.

A three-dimensional thermo-mechanical Finite element models of cold pilgering has been developed in the course of the work leading to this thesis. The commercial code MSC. Marcwas used in the simulations. General 3D models are needed to be able to capture asymmetric deformation in cold pilgering. Elastic deflections of tools and roll stand were included in the model via linear and nonlinear springs that were calibrated versus experiments. A temperature dependent Chaboche type plasticity model was employed in this simulation to mimic strain hardening and softening behavior under multidirectional loading. The model parameters were optimized using multi-directional compression and uni-directional tensile tests. Heat exchange between tools and lubricant was included in the simulation via heat convection films on the surfaces. The film parameters were calibrated using experimental data. Simulation predictions for hardening, rolling force, process temperature and geometry were compared with experiments for validation purposes. The predictions showed overall good agreement with validation experiments enabling the use of this model for understanding and improving the process.

Place, publisher, year, edition, pages
Luleå: Luleå University of Technology, 2023.
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
Keywords [en]
Cold pilgering, finite element method
National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-96309ISBN: 978-91-8048-293-6 (print)ISBN: 978-91-8048-294-3 (electronic)OAI: oai:DiVA.org:ltu-96309DiVA, id: diva2:1748864
Public defence
2023-06-14, E231, Luleå tekniska universitet, Luleå, 09:00 (English)
Opponent
Supervisors
Available from: 2023-04-04 Created: 2023-04-04 Last updated: 2023-05-24Bibliographically approved
List of papers
1. Finite Element Modelling of Cold Pilgering of Tubes
Open this publication in new window or tab >>Finite Element Modelling of Cold Pilgering of Tubes
2015 (English)In: Computational Plasticity XIII: Fundamentals and Applications - Proceedings of the 13th International Conference on Computational Plasticity - Fundamentals and Applications,held in Barcelona, Spain, 1-3 September 2015 / [ed] E. Oñate; D.R.J. Owen; D. Peric; M. Chiumenti, Barcelona: International Center for Numerical Methods in Engineering (CIMNE), 2015, p. 716-726Conference paper, Published paper (Refereed)
Abstract [en]

Cold pilgering is a cold forming process used during manufacturing of seamless tubes. The tube with a mandrel inside is fed forward and rotated in stepwise increments, while the roll stand moves back and forth. The total plastic deformation of the tube is such that the cross-sectional area of the tube decreases and the length of the tube increases during the process. However, this is performed in many small incremental steps, where the direction of deformation in a material point changes at each stroke. Most published models of cold pilgering use simplified material models. In reality, the flow stress is dependent on temperature, strain rate, strain history and microstructure. In this work, temperature and strain rate distributions are computed, using a 3D thermo-mechanical FE model, and the influence of temperature and strain rate on the rolling force is investigated. The Johnson-Cook model is employed to describe the flow stress using isotropic hardening. The results show that strain rate and temperature have a significant influence on the roll separation force

Place, publisher, year, edition, pages
Barcelona: International Center for Numerical Methods in Engineering (CIMNE), 2015
National Category
Other Materials Engineering
Research subject
Material Mechanics
Identifiers
urn:nbn:se:ltu:diva-40526 (URN)000380573600069 ()2-s2.0-84992261190 (Scopus ID)fb3a73cd-20e7-4301-bd32-362df80d0902 (Local ID)978-84-944244-6-5 (ISBN)fb3a73cd-20e7-4301-bd32-362df80d0902 (Archive number)fb3a73cd-20e7-4301-bd32-362df80d0902 (OAI)
Conference
International Conference on Computational Plasticity. Fundamentals and Applications : 01/09/2015 - 03/09/2015
Note

Validerad; 2016; Nivå 1; 2016-10-06 (andbra)

Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2023-04-04Bibliographically approved
2. Finite element modeling of tube deformation during cold pilgering
Open this publication in new window or tab >>Finite element modeling of tube deformation during cold pilgering
2016 (English)In: NUMIFORM 2016: The 12th International Conference on Numerical Methods in Industrial Forming Processes / [ed] Saanouni, K; Chenot, JL; Duval, JL, 2016, Vol. 80, p. 1-8, article id 15004Conference paper, Published paper (Refereed)
Abstract [en]

A three-dimensional finite element model of cold pilgering of stainless steel tubes is developed in this paper. The objective is to use the model to increase the understanding of forces and deformations in the process. The focus is on the influence of vertical displacements of the roll stand and axial displacements of the mandrel and tube. Therefore, the rigid tools and the tube are supported with elastic springs. Additionally, the influences of friction coefficients in the tube/mandrel and tube/roll interfaces are examined. A sensitivity study is performed to investigate the influences of these parameters on the strain path and the roll separation force. The results show the importance of accounting for the displacements of the tube and rigid tools on the roll separation force and the accumulative plastic strain.

Series
MATEC Web of conferences, ISSN 2261-236X ; 80
National Category
Other Materials Engineering
Research subject
Material Mechanics
Identifiers
urn:nbn:se:ltu:diva-62640 (URN)10.1051/matecconf/20168015004 (DOI)000392331100086 ()2-s2.0-85016095165 (Scopus ID)
Conference
12th International Conference on Numerical Methods in Industrial Forming Processes (NUMIFORM),Troyes,France, 04-07 July 2016
Available from: 2017-03-23 Created: 2017-03-23 Last updated: 2023-04-04Bibliographically approved
3. Finite Element Analysis of cold pilgering using elastic roll dies
Open this publication in new window or tab >>Finite Element Analysis of cold pilgering using elastic roll dies
2017 (English)In: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 207, p. 2370-2375Article in journal (Refereed) Published
Abstract [en]

A finite element model of cold pilgering with elastic roll dies have been developed and used to investigate the influence of roll die deformation on the material flow, contact region, roll separating force and tube dimensions. Full scale experiments were performed to validate the contact surface and tube dimensions. The results show that the influence of roll die flattening is not significant on the contact length. However, elastic deformation of roll die has strong influence on both the wall thickness reduction and roll separating force. Thus it is recommended to consider elasticity of roll dies when forces and tube dimensions are estimated.

Place, publisher, year, edition, pages
Elsevier, 2017
Keywords
cold pilgering, cold forming, tube forming, roll flattening, contact length, roll separating force, finite element method, tool elasticity, tube dimension
National Category
Applied Mechanics Other Materials Engineering
Research subject
Material Mechanics
Identifiers
urn:nbn:se:ltu:diva-62938 (URN)10.1016/j.proeng.2017.10.1010 (DOI)000569773100398 ()2-s2.0-85036627374 (Scopus ID)
Conference
International Conference on the Technology of Plasticity, ICTP 2017, Cambridge, United Kingdom, 17-22 September 2017
Note

Konferensartikel i tidskrift

Available from: 2017-04-07 Created: 2017-04-07 Last updated: 2023-04-04Bibliographically approved
4. Work hardening during alternating load directions of 316L SS
Open this publication in new window or tab >>Work hardening during alternating load directions of 316L SS
Show others...
2018 (English)In: Proceedings of the 17th International Conference on Metal Forming METAL FORMING 2018 September 16 – 19, 2018, Loisir Hotel Toyohashi, Toyohashi, Japan / [ed] Ken-ichiro Mori; Yohei Abe; Tomoyoshi Maeno, Elsevier, 2018, p. 1777-1784Conference paper, Published paper (Refereed)
Abstract [en]

Understanding and modelling the plastic behavior of a material are essential for simulation and design of metal forming processes. Cold pilgering of tubes is a process with very complex strain history with alternating loading direction. This makes evaluation of the work hardening challenging. Cold deformation applied in a single direction predominantly exhibit work hardening, while changes of the loading direction may even cause softening in other directions. The influence of alternating loading directions on work hardening has been experimentally investigated for 316L stainless steel (SS). Cubic specimens were cut out from the preform of the tube. The specimens are subjected to uniaxial compressions in alternating directions along two perpendicular axes. From the results, a cyclic elastic-plastic constitutive model based on a Chaboche-type approach is calibrated and implemented in the commercial finite element code MSC.Marc.

Place, publisher, year, edition, pages
Elsevier, 2018
Series
Proceedia Manufacturing, ISSN 2351-9789 ; 15
Keywords
Finite element method (FEM), Isotropic, kinematic hardening, Cyclic plasticity, Chaboche mode, lUniaxial / Multiaxial loading, Cold pilgering, Tube forming
National Category
Applied Mechanics
Research subject
Material Mechanics
Identifiers
urn:nbn:se:ltu:diva-86314 (URN)10.1016/j.promfg.2018.07.246 (DOI)000547828500232 ()2-s2.0-85063795502 (Scopus ID)
Conference
17th International Conference on Metal Forming (Metal Forming 2018), Toyohashi, Japan, September 16-19, 2018
Funder
Region Dalarna
Note

Finansiär: Sandvik Materials Technology; Högskolan Dalarna; Jernkontoret; Region Gävleborg; Sandvikens Kommun; Länsstyrelsen Gävleborg

Available from: 2021-07-08 Created: 2021-07-08 Last updated: 2023-04-04Bibliographically approved
5. Temperature and plastic strain dependent Chaboche model for 316L used in simulation of Cold Pilgering
Open this publication in new window or tab >>Temperature and plastic strain dependent Chaboche model for 316L used in simulation of Cold Pilgering
(English)Manuscript (preprint) (Other academic)
National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
urn:nbn:se:ltu:diva-96307 (URN)
Available from: 2023-04-04 Created: 2023-04-04 Last updated: 2023-04-04
6. Modeling of cold pilgering of stainless-steel tubes
Open this publication in new window or tab >>Modeling of cold pilgering of stainless-steel tubes
2024 (English)In: Journal of Manufacturing Processes, ISSN 1526-6125, Vol. 112, p. 112-125Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Elsevier, 2024
National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
urn:nbn:se:ltu:diva-96308 (URN)10.1016/j.jmapro.2024.01.039 (DOI)
Funder
Dalarna University
Note

Funder: Alleima (previously Sandvik Materials Technology); Jernkontoret; Sandviken kommun;

This article has previously appeared as a manuscript in a thesis.

Available from: 2023-04-04 Created: 2023-04-04 Last updated: 2024-02-20

Open Access in DiVA

fulltext(4906 kB)194 downloads
File information
File name FULLTEXT01.pdfFile size 4906 kBChecksum SHA-512
a7af27602d6d998bcd83eeeaefda974343f5c442275d57c2fb5e9f29c945338ec0d39e086d71c81d3c7e84098a123c0b59d01979fed20885a8ee0d08fb687b2e
Type fulltextMimetype application/pdf

Authority records

Azizoğlu, Yağız

Search in DiVA

By author/editor
Azizoğlu, Yağız
By organisation
Solid Mechanics
Applied Mechanics

Search outside of DiVA

GoogleGoogle Scholar
Total: 194 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 764 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf