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Temperature and plastic strain dependent Chaboche model for 316L used in simulation of Cold Pilgering
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Solid Mechanics.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Solid Mechanics.
(English)Manuscript (preprint) (Other academic)
National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-96307OAI: oai:DiVA.org:ltu-96307DiVA, id: diva2:1748845
Available from: 2023-04-04 Created: 2023-04-04 Last updated: 2023-04-04
In thesis
1. Modeling of Cold Pilgering of Stainless Steel Tubes
Open this publication in new window or tab >>Modeling of Cold Pilgering of Stainless Steel Tubes
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
Cold pilgering, finite element method
National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
urn:nbn:se:ltu:diva-96309 (URN)978-91-8048-293-6 (ISBN)978-91-8048-294-3 (ISBN)
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

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Output format
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