Modelling of Damage During Hot Forging of Ingots

Peter Christiansen, Jesper Henri Hattel, Niels Bay, Paolo A.F. Martins

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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Abstract

Ductile damage modelling in the ingot forging process is discussed. Advantages and disadvantages of both coupled and uncoupled ductile damage models are presented. Some uncoupled damage models are examined in greater detail regarding their applicability to different processes, where hydrostatic compression as well as tension, combined with shear stresses, are present. It is shown that the numerical implementation can influence the results substantially and therefore lead to software user dependent conclusions. It may be advantageous for the user of commercial finite element programs to base the damage analysis on the Cockcroft & Latham criterion, since this with changing cut-off value does not inconsistently change the location of damage, in contradiction to the other investigated criteria, and since it is able to predict damage in processes, which are slightly compressive.
Original languageEnglish
Title of host publicationSTEELSIM 2013 - The 5th International Conference
Number of pages12
Publication date2013
Publication statusPublished - 2013
EventInternational Conference on Modelling and Simulation of Metallurgical Processes in Steelmaking - Ostrava, Czech Republic
Duration: 10 Sep 201313 Sep 2013

Conference

ConferenceInternational Conference on Modelling and Simulation of Metallurgical Processes in Steelmaking
CountryCzech Republic
CityOstrava
Period10/09/201313/09/2013

Cite this

Christiansen, P., Hattel, J. H., Bay, N., & Martins, P. A. F. (2013). Modelling of Damage During Hot Forging of Ingots. In STEELSIM 2013 - The 5th International Conference
Christiansen, Peter ; Hattel, Jesper Henri ; Bay, Niels ; Martins, Paolo A.F. / Modelling of Damage During Hot Forging of Ingots. STEELSIM 2013 - The 5th International Conference. 2013.
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Christiansen, P, Hattel, JH, Bay, N & Martins, PAF 2013, Modelling of Damage During Hot Forging of Ingots. in STEELSIM 2013 - The 5th International Conference. International Conference on Modelling and Simulation of Metallurgical Processes in Steelmaking, Ostrava, Czech Republic, 10/09/2013.

Modelling of Damage During Hot Forging of Ingots. / Christiansen, Peter; Hattel, Jesper Henri; Bay, Niels; Martins, Paolo A.F.

STEELSIM 2013 - The 5th International Conference. 2013.

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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T1 - Modelling of Damage During Hot Forging of Ingots

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AU - Bay, Niels

AU - Martins, Paolo A.F.

PY - 2013

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N2 - Ductile damage modelling in the ingot forging process is discussed. Advantages and disadvantages of both coupled and uncoupled ductile damage models are presented. Some uncoupled damage models are examined in greater detail regarding their applicability to different processes, where hydrostatic compression as well as tension, combined with shear stresses, are present. It is shown that the numerical implementation can influence the results substantially and therefore lead to software user dependent conclusions. It may be advantageous for the user of commercial finite element programs to base the damage analysis on the Cockcroft & Latham criterion, since this with changing cut-off value does not inconsistently change the location of damage, in contradiction to the other investigated criteria, and since it is able to predict damage in processes, which are slightly compressive.

AB - Ductile damage modelling in the ingot forging process is discussed. Advantages and disadvantages of both coupled and uncoupled ductile damage models are presented. Some uncoupled damage models are examined in greater detail regarding their applicability to different processes, where hydrostatic compression as well as tension, combined with shear stresses, are present. It is shown that the numerical implementation can influence the results substantially and therefore lead to software user dependent conclusions. It may be advantageous for the user of commercial finite element programs to base the damage analysis on the Cockcroft & Latham criterion, since this with changing cut-off value does not inconsistently change the location of damage, in contradiction to the other investigated criteria, and since it is able to predict damage in processes, which are slightly compressive.

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Christiansen P, Hattel JH, Bay N, Martins PAF. Modelling of Damage During Hot Forging of Ingots. In STEELSIM 2013 - The 5th International Conference. 2013