Modelling of Damage During Hot Forging of Ingots

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

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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
    Country/TerritoryCzech Republic
    CityOstrava
    Period10/09/201313/09/2013

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