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[71080] Artykuł: Calibration of constitutive equations under conditions of large strains and stress triaxialityCzasopismo: Archives of Civil and Mechanical Engineering Tom: 18, Zeszyt: 4, Strony: 1123-1135ISSN: 1644-9665 Opublikowano: Wrzesień 2018 Liczba arkuszy wydawniczych: 2.00 Autorzy / Redaktorzy / Twórcy Grupa MNiSW: Publikacja w czasopismach wymienionych w wykazie ministra MNiSzW (część A) Punkty MNiSW: 30 Pełny tekst DOI Słowa kluczowe: Calibration of constitutive equations  Lode factor  Stress triaxiality  Keywords: Calibration of constitutive equations  Lode factor  Stress triaxiality  |
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 8C, –20 8C, and –50 8C, and on three different materials obtained
by three different heat treatments of S355JR steel.
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 8C, –20 8C, and –50 8C, and on three different materials obtained
by three different heat treatments of S355JR steel.