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Calibration of constitutive equations under conditions of large strains and stress triaxiality

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Abstract

Constitutive equations were calibrated to improve their application in assessing a stress field in front of a crack under the conditions of large strains and stress triaxiality. The Bai-Wierzbicki method was adopted, and certain changes and new terms were introduced to incorporate material softening. Five shapes of specimens were tested to cover a wide range of stress triaxiality conditions and Lode factors. Tests were performed at three different temperatures, namely, +20 °C, -20 °C, and -50 °C, and on three different materials obtained by three different heat treatments of S355JR steel.

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Authors and Affiliations

  1. Kielce University of Technology, Al.1000-lecia P.P.7, Kielce, 25-314, Poland

    Andrzej Neimitz, Jaroslaw Galkiewicz & Ihor Dzioba

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  1. Andrzej Neimitz
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  2. Jaroslaw Galkiewicz
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  3. Ihor Dzioba
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Correspondence to Andrzej Neimitz.

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Neimitz, A., Galkiewicz, J. & Dzioba, I. Calibration of constitutive equations under conditions of large strains and stress triaxiality. Archiv.Civ.Mech.Eng 18, 1123–1135 (2018). https://doi.org/10.1016/j.acme.2018.02.013

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