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Odenberger, Eva-Lis
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Publications (10 of 16) Show all publications
Pérez Caro, L., Odenberger, E.-L., Schill, M., Steffenburg-Nordenström, J., Niklasson, F. & Oldenburg, M. (2020). Correction to: Prediction of shape distortions during forming and welding of a double-curved strip geometry in alloy 718 [Letter to the editor]. The International Journal of Advanced Manufacturing Technology, 107(7-8), 2983-2983
Open this publication in new window or tab >>Correction to: Prediction of shape distortions during forming and welding of a double-curved strip geometry in alloy 718
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2020 (English)In: The International Journal of Advanced Manufacturing Technology, ISSN 0268-3768, E-ISSN 1433-3015, Vol. 107, no 7-8, p. 2983-2983Article in journal, Letter (Other academic) Published
Place, publisher, year, edition, pages
Springer, 2020
National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
urn:nbn:se:ltu:diva-78798 (URN)10.1007/s00170-020-05234-9 (DOI)2-s2.0-85083098925 (Scopus ID)
Note

Erratum in: The International Journal of Advanced Manufacturing Technology, vol. 107, iss. 7-8, p. 2967–2981, DOI: 10.1007/s00170-020-05118-y

Godkänd;2020;Nivå 0;2020-05-06 (alebob)

Available from: 2020-05-06 Created: 2020-05-06 Last updated: 2020-05-08Bibliographically approved
Pérez Caro, L., Schill, M., Haller, K., Odenberger, E.-L. & Oldenburg, M. (2020). Damage and fracture during sheet-metal forming of alloy 718. International Journal of Material Forming, 13, 15-28
Open this publication in new window or tab >>Damage and fracture during sheet-metal forming of alloy 718
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2020 (English)In: International Journal of Material Forming, ISSN 1960-6206, E-ISSN 1960-6214, Vol. 13, p. 15-28Article in journal (Refereed) Published
Abstract [en]

Forming nickel-based superalloy aero-engine components is a challenging process, largely because of the risk of high degree of springback and issues with formability. In the forming tests conducted on alloy 718 at room temperature, open fractures are observed in the drawbead regions, which are not predicted while evaluating the formability using the traditional forming-limit diagram(FLD). This highlights the importance of an accurate prediction of failure during forming as, in some cases, may severely influence the springback and thereby the accuracy of the predicted shape distortions, leading the final shape of the formed component out of tolerance. In this study, the generalised incremental stress-state dependent damage model (GISSMO) is coupled with the isotropic von Mises and the anisotropic Barlat Yld2000-2D yield criteria to predict the material failure in the forming simulations conducted on alloy 718 using LS-DYNA. Their effect on the predicted effective plastic strains and shape deviations is discussed. The failure and instability strains needed to calibrate the GISSMO are directly obtained from digital image correlation (DIC) measurements in four different specimen geometries i.e. tensile, plane strain, shear, and biaxial. The damage distribution over the drawbeads is measured using a non-linear acoustic technique for validation purposes. The numerical simulations accurately predict failure at the same regions as those observed in the experimental forming tests. The expected distribution of the damage over the drawbeads is in accordance with the experimental measurements. The results highlight the potential of considering DIC to calibrate the GISSMO in combination with an anisotropic material model for forming simulations in alloy 718.

Place, publisher, year, edition, pages
Springer, 2020
Keywords
alloy 718, damage, fracture, GISSMO, non-linear acoustic technique, optimisation
National Category
Metallurgy and Metallic Materials Applied Mechanics
Research subject
Solid Mechanics
Identifiers
urn:nbn:se:ltu:diva-62903 (URN)10.1007/s12289-018-01461-4 (DOI)000512038100002 ()2-s2.0-85059526587 (Scopus ID)
Projects
Virtual process chain for superalloy sheet metal aero engine structures - Validation and demonstrator (NFFP6)
Funder
Vinnova, 2013-01173
Note

Validerad;2020;Nivå 2;2020-01-27 (johcin)

Available from: 2017-04-05 Created: 2017-04-05 Last updated: 2020-03-24Bibliographically approved
Pérez Caro, L., Odenberger, E.-L., Schill, M., Steffenburg-Nordenström, J., Niklasson, F. & Oldenburg, M. (2020). Prediction of shape distortions during forming and welding of a double-curved strip geometry in alloy 718. The International Journal of Advanced Manufacturing Technology, 107(7-8), 2967-2981
Open this publication in new window or tab >>Prediction of shape distortions during forming and welding of a double-curved strip geometry in alloy 718
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2020 (English)In: The International Journal of Advanced Manufacturing Technology, ISSN 0268-3768, E-ISSN 1433-3015, Vol. 107, no 7-8, p. 2967-2981Article in journal (Refereed) Published
Abstract [en]

The finite-element method (FEM) has considerably contributed to the development of more advanced manufacturing methods for metal structures. The prediction of the final shape of a component is of great interest to the manufacturing industry. In addition to its inherent difficulties, the presence of various types of processes in the manufacturing chain may dramatically increase the level of demand. Therefore, including all steps of the manufacturing process in the simulations is key to being successful. This has been done for a long time in the stamping industry, which involves sequences of forming, trimming, and springback. However, more complex manufacturing procedures, that include assembling of formed parts with forgings and castings via welding, have been modeled with simplifications, resulting in a reduced prediction accuracy. This hinders the compensation of accumulated shape distortions based on the simulation results. One such example is the fabrication of aero-engine structures, in which the history from the forming procedure has not been considered in subsequent welding and heat treatment analyses. In the present study, a double-shaped part manufactured from alloy 718 is formed at 20 °C and laser-welded using the bead-on-plate procedure. The coupling of different manufacturing analyses, including cold forming, trimming, result mapping, welding, cooling, and springback, is achieved using LS-DYNA. Additionally, the effect of adding the GISSMO damage model in the forming simulation is studied. The results of the forming analysis are used as inputs for the material model *MAT_CWM in the welding simulation. The anisotropic thermomechanical properties of alloy 718 are determined at temperatures up to 1000 °C. Encouraging agreement is found between the model predictions and the results of forming and welding tests. The findings underscore the importance of including the material history and accurate process conditions along the manufacturing chain to both the prediction accuracy of shape distortions, and to the potential of the industry.

Place, publisher, year, edition, pages
Springer, 2020
Keywords
Forming, Welding, Alloy 718, Shape distortions, Anisotropy, High temperature measurements
National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
urn:nbn:se:ltu:diva-63348 (URN)10.1007/s00170-020-05118-y (DOI)000520800100002 ()2-s2.0-85082801634 (Scopus ID)
Projects
Virtual process chain for superalloy sheet metal aero engine structures - Validation and demonstrator (NFFP6)
Funder
Vinnova, 2013-01173
Note

Validerad;2020;Nivå 2;2020-05-06 (alebob)

Available from: 2017-05-14 Created: 2017-05-14 Last updated: 2020-05-06Bibliographically approved
Odenberger, E.-L., Pederson, R. & Oldenburg, M. (2019). Finite element modeling and validation of springback and stress relaxation in the thermo-mechanical forming of thin Ti-6Al-4V sheets. The International Journal of Advanced Manufacturing Technology, 104(9-12), 3439-3455
Open this publication in new window or tab >>Finite element modeling and validation of springback and stress relaxation in the thermo-mechanical forming of thin Ti-6Al-4V sheets
2019 (English)In: The International Journal of Advanced Manufacturing Technology, ISSN 0268-3768, E-ISSN 1433-3015, Vol. 104, no 9-12, p. 3439-3455Article in journal (Refereed) Published
Abstract [en]

In this work, a hot forming procedure is developed using computer-aided engineering (CAE) to produce thin Ti-6Al-4V sheet components in an effective way. Traditional forming methods involve time- and cost-consuming furnace heating and subsequent hot sizing steps. A material model for finite element (FE) analyses of sheet metal forming and springback at elevated temperatures in Ti-6Al-4V is calibrated and evaluated. The anisotropic yield criterion proposed by Barlat et al. 2003 is applied, and the time- and temperature-dependent stress relaxation behavior for elastic and inelastic straining are modeled using a Zener–Wert–Avrami formulation. Thermo-mechanical uniaxial tensile tests, a biaxial test, and uniaxial stress relaxation tests are performed and used as experimental reference to identify material model parameters at temperatures up to 700 °C. The hot forming tool setup is manufactured and used to produce double-curved aero engine components at 700 °C with different cycle times for validation purposes. Correlations between the predicted and measured responses such as springback and shape deviation show promising agreement, also when the forming and subsequent holding time was as low as 150 s. The short cycle time resulted in elimination of a detectable alpha case layer. Also, the tool surface coating extends the tool life in combination with a suitable lubricant. 

Place, publisher, year, edition, pages
Springer, 2019
Keywords
Hot forming, Stress relaxation, Springback, Ti-6Al-4V, Plastic anisotropy, FE analysis
National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
urn:nbn:se:ltu:diva-75356 (URN)10.1007/s00170-019-04071-9 (DOI)000500220700016 ()
Note

Validerad;2019;Nivå 2;2019-11-27 (johcin)

Available from: 2019-07-24 Created: 2019-07-24 Last updated: 2019-12-20Bibliographically approved
Odenberger, E.-L., Pérez Caro, L., Åhlin, H. & Oldenburg, M. (2018). Thermo-mechanical Material Characterization and Stretch-bend Forming of AA6016. Paper presented at International Deep Drawing Research Group 37th Annual Conference 3–7 June 2018, University of Waterloo, Waterloo, Ontario, Canada. IOP Conference Series: Materials Science and Engineering, 418, Article ID 012022.
Open this publication in new window or tab >>Thermo-mechanical Material Characterization and Stretch-bend Forming of AA6016
2018 (English)In: IOP Conference Series: Materials Science and Engineering, ISSN 1757-8981, E-ISSN 1757-899X, Vol. 418, article id 012022Article in journal (Refereed) Published
Abstract [en]

Lightweight design has become increasingly in focus for the manufacturing industry. Global environmental challenges, goals and legislations imply that lighter and sustainable products are imperative to remain competitive. One example is stamped products made of aluminum alloys which are of interest to the automotive industry, where lightweight designs are essential. In order to increase formability and to produce more complex geometries in stamped aluminum components there is a need to develop hot forming techniques. The Finite Element Method (FEM) has enabled important advances in the study and design of competitive manufacturing procedures for metal parts. Predicting the final geometry of a component is a complex task, especially if the forming procedure occurs at elevated temperatures. This work presents selected results from thermo-mechanical material testing procedures, FE-analyses and forming validation tests in AA6016 material. The material tests are used to determine the thermo-mechanical anisotropic properties, strain rate sensitivity and formability (Forming Limit Curves, FLC) at temperatures up to 490°C. Stretch-bending tests are performed to compare predicted results with experimental observations such as punch force, strain levels, thinning, forming temperatures, springback and failure. It was found that the heat-treatment and forming at elevated temperatures substantially increased formability and that measured responses could in general be predicted if care was taken to model the initial blank temperatures, heat transfer and thermo-mechanical material properties. The room temperature case confirms the importance of considering anisotropy.

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2018
National Category
Applied Mechanics Other Civil Engineering
Research subject
Solid Mechanics; Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-71364 (URN)10.1088/1757-899X/418/1/012022 (DOI)2-s2.0-85054260019 (Scopus ID)
Conference
International Deep Drawing Research Group 37th Annual Conference 3–7 June 2018, University of Waterloo, Waterloo, Ontario, Canada
Note

Konferensartikel i tidskrift;2018-10-30 (svasva)

Available from: 2018-10-30 Created: 2018-10-30 Last updated: 2019-01-11Bibliographically approved
Odenberger, E.-L., Thilderkvist, P. & Oldenburg, M. (2014). Springback and stress relaxation in thermo-mechanical forming of thin Ti-6Al-4v sheets (ed.). Paper presented at The International Symposium on Plasticity and its Current Applications : 03/01/2014 - 08/01/2014. Paper presented at The International Symposium on Plasticity and its Current Applications : 03/01/2014 - 08/01/2014.
Open this publication in new window or tab >>Springback and stress relaxation in thermo-mechanical forming of thin Ti-6Al-4v sheets
2014 (English)Conference paper, Oral presentation only (Refereed)
National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
urn:nbn:se:ltu:diva-34786 (URN)912bf0a4-9250-4796-8d58-ce2842ad239d (Local ID)912bf0a4-9250-4796-8d58-ce2842ad239d (Archive number)912bf0a4-9250-4796-8d58-ce2842ad239d (OAI)
Conference
The International Symposium on Plasticity and its Current Applications : 03/01/2014 - 08/01/2014
Note
Godkänd; 2014; 20140114 (evawes)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Odenberger, E.-L., Oldenburg, M. & Niklasson, F. (2013). Direct-hit development of manufacturing processes: Thermo-mechanical forming of Titanium aero engine structures (ed.). In: (Ed.), (Ed.), Book of Abstracts for the 4:th CEAS Conference, 2013: . Paper presented at The International Conference of the European Aerospace Scocieties : 16/09/2013 - 19/09/2013 (pp. 175). Linköping: Linkoping University Electronic Press
Open this publication in new window or tab >>Direct-hit development of manufacturing processes: Thermo-mechanical forming of Titanium aero engine structures
2013 (English)In: Book of Abstracts for the 4:th CEAS Conference, 2013, Linköping: Linkoping University Electronic Press , 2013, p. 175-Conference paper, Meeting abstract (Refereed)
Abstract [en]

In order to increase the competitiveness of the Swedish aerospace industry, alternative manufacturing processes for static load carrying aero engine structures are desired. Presently, these components mainly consist of large-scaled single castings. To increase the in-house level of processing, the Swedish aero engine industry focus on fabricated alternatives by introducing new manufacturing processes and create relations with adjacent sub-suppliers. Theconcept of fabrication involves forgings, sheet metals and small ingots assembled by welding. The possibility to reduce weight, i.e. fuel consumption and product cost also exists. In the aerospace industry extremely highdemands on safety and reliability exists which requires precise knowledge regarding the influence on the material and its properties through the whole fabrication chain. The advanced Finite Element (FE) technology makes precise analyses possible assuming that proper material descriptions are used. Analyses of sheet metal forming provides with information of formability, thinning, springback, resultant mechanical properties and residual stress state which are important input to analyses of subsequent welding and heat treatments. One challenge in producing complete structures based on fabrication isrelated to the accuracy in numerical predictions of shape deviation using FE-analyses, in order to effectively compensate forming tools forspringback and accumulated shape distortions. By fundamental research on and development of thermo-mechanical processes for hot sheet metal forming of titanium, this project shall result in that a few SME can further developtheir processes for product and process development. The project gather competence from the Swedish aero engine industry GKN Aerospace, acknowledged R&D within forming processes, FE-modelling and SME withexperience of forming. The aims of the project are:Development of methodologies for thermomechanical material characterisation of Ti-6Al- 4V and FE-models for hot sheet metal forming. Suggestion of forming procedures suitable for production of titanium components in which resultant geometry and properties are secured.Activities where Swedish SME takes necessary development steps, in order to produce desired titanium sheet metal parts and develop into new sub-suppliers for the Aero engine industry. This presentation summarise results obtained inpresent and previous research and development projects regarding short lead time design, compensation and manufacturing of deep drawing tools of titanium and super alloys. The research funding by VINNOVA - NFFP 4 and 5for SME, BFS and GKN Aerospace Sweden are gratefully acknowledged.

Place, publisher, year, edition, pages
Linköping: Linkoping University Electronic Press, 2013
National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
urn:nbn:se:ltu:diva-39065 (URN)da8be1c6-8d8a-4ff5-9708-1afb6ea0e65e (Local ID)978-91-7519-520-9 (ISBN)da8be1c6-8d8a-4ff5-9708-1afb6ea0e65e (Archive number)da8be1c6-8d8a-4ff5-9708-1afb6ea0e65e (OAI)
Conference
The International Conference of the European Aerospace Scocieties : 16/09/2013 - 19/09/2013
Note
Godkänd; 2013; 20140114 (evawes)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-11-25Bibliographically approved
Odenberger, E.-L., Hertzman, J., Thilderkvist, P., Merklein, M., Kuppert, A., Stöhr, B., . . . Oldenburg, M. (2013). Thermo-mechanical sheet metal forming of aero engine components in Ti-6Al-4V: Part 1: Material characterisation (ed.). Paper presented at . International Journal of Material Forming, 6(3), 391-402
Open this publication in new window or tab >>Thermo-mechanical sheet metal forming of aero engine components in Ti-6Al-4V: Part 1: Material characterisation
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2013 (English)In: International Journal of Material Forming, ISSN 1960-6206, E-ISSN 1960-6214, Vol. 6, no 3, p. 391-402Article in journal (Refereed) Published
Abstract [en]

Ti-6Al-4V is one of the most frequently used titanium alloy in aerospace applications such as for load carrying engine structures, due to their high strength to weight ratio in combination with favourable creep resistance at moderate operating temperatures. In the virtual development process of designing suitable thermo-mechanical forming processes for titanium sheet metal components in aero engine applications numerical finite element (FE) simulations are desirable to perform. The benefit is related to the ability of securing forming concepts with respect to shape deviation, thinning and strain localisation. The reliability of the numerical simulations depends on both models and methods used as well as on the accuracy and applicability of the material input data. The material model and related property data need to be consistent with the conditions of the material in the studied thermo-mechanical forming process. In the present work a set of material tests are performed on Ti-6Al-4V at temperatures ranging from room temperature up to 560°C. The purpose is to study the mechanical properties of the specific batch of alloy but foremost to identify necessary material model requirements and generate experimental reference data for model calibration in order to perform FE-analyses of sheet metal forming at elevated temperatures in Ti-6Al-4V.

National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
urn:nbn:se:ltu:diva-4164 (URN)10.1007/s12289-012-1093-8 (DOI)000323246800006 ()2-s2.0-84881614342 (Scopus ID)20e76bae-7e41-4fa2-bde8-af8c7bce06f5 (Local ID)20e76bae-7e41-4fa2-bde8-af8c7bce06f5 (Archive number)20e76bae-7e41-4fa2-bde8-af8c7bce06f5 (OAI)
Note
Validerad; 2013; 20120308 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Odenberger, E.-L., Schill, M. & Oldenburg, M. (2013). Thermo-mechanical sheet metal forming of aero engine components in Ti-6Al-4V: Part 2 : Constitutive modelling and validation (ed.). Paper presented at . International Journal of Material Forming, 6(3), 403-416
Open this publication in new window or tab >>Thermo-mechanical sheet metal forming of aero engine components in Ti-6Al-4V: Part 2 : Constitutive modelling and validation
2013 (English)In: International Journal of Material Forming, ISSN 1960-6206, E-ISSN 1960-6214, Vol. 6, no 3, p. 403-416Article in journal (Refereed) Published
Abstract [en]

In this work constitutive models suitable for thermo-mechanical forming of the titanium alloy Ti-6Al-4V are evaluated. A tool concept for thermo-mechanical forming of a double-curved sheet metal component in Ti-6Al-4V is proposed. The virtual tool design is based on finite element (FE) analyses of thermo-mechanical sheet metal forming in which two different anisotropic yield criteria are evaluated and compared with an isotropic assumption to predict global forming force, draw-in, springback and strain localisation. The shape of the yield surface has been found important and the accuracy of the predicted shape deviation could be slightly improved by including the cooling procedure. The predicted responses show promising agreement with the corresponding experimental observations when the anisotropic properties of the material are considered

National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
urn:nbn:se:ltu:diva-2804 (URN)10.1007/s12289-012-1094-7 (DOI)000323246800007 ()2-s2.0-84881612325 (Scopus ID)080f5d25-6705-4ea9-bfc9-3eb2e4d64aa6 (Local ID)080f5d25-6705-4ea9-bfc9-3eb2e4d64aa6 (Archive number)080f5d25-6705-4ea9-bfc9-3eb2e4d64aa6 (OAI)
Note
Validerad; 2013; 20120314 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Odenberger, E.-L., Oldenburg, M., Thilderkvist, P., Stoehr, T., Lechler, J. & Merklein, M. (2011). Tool development based on modelling and simulation of hot sheet metal forming of Ti-6Al-4 V titanium alloy (ed.). Paper presented at . Journal of Materials Processing Technology, 211(8), 1324-1335
Open this publication in new window or tab >>Tool development based on modelling and simulation of hot sheet metal forming of Ti-6Al-4 V titanium alloy
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2011 (English)In: Journal of Materials Processing Technology, ISSN 0924-0136, E-ISSN 1873-4774, Vol. 211, no 8, p. 1324-1335Article in journal (Refereed) Published
Abstract [en]

In the aero engine industry alternative manufacturing processes for load carrying aero engine structures imply fabrication. The concept of fabrication involves simple forgings, sheet metals and small ingots of e.g. titanium alloys which are welded together and heat treated. In the concept phase of the product development process, accurate evaluations of candidate manufacturing processes with short lead times are crucial. In the design of sheet metal forming processes, the manual die try out of deep drawing tools is traditionally a time consuming, expensive and inexact process. The present work investigates the possibility to design hot forming tools, with acceptable accuracy at short lead times and with minimal need for the costly die try out, using finite element (FE) analyses of hot sheet metal forming in the titanium alloy Ti-6Al-4 V. A rather straightforward and inexpensive approach of material modelling and methods for material characterisation are chosen, suitable for early evaluations in the concept phase. Numerical predictions of punch force, draw-in and shape deviation are compared with data from separate forming experiments performed at moderately elevated temperatures. The computed responses show promising agreement with experimental measurements and the predicted shape deviation is within the sheet thickness when applying an anisotropic yield criterion. Solutions for the hot forming tool concept regarding heating and regulation, insulation, blank holding and tool material selection are evaluated within the present work.

National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
urn:nbn:se:ltu:diva-4590 (URN)10.1016/j.jmatprotec.2011.03.001 (DOI)000291172700002 ()2-s2.0-79955468380 (Scopus ID)28e14cd9-1267-4c0f-b16f-0847c6bc79ec (Local ID)28e14cd9-1267-4c0f-b16f-0847c6bc79ec (Archive number)28e14cd9-1267-4c0f-b16f-0847c6bc79ec (OAI)
Note
Validerad; 2011; 20110316 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
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