Modeling of stress distribution on the basis of the measured values of strain and temperature changes

Ivan Jandrlić; Stoja Rešković; Dušan Ćurčija; Ladislav Lazić; Tin Brlić; Ivan Jandrlić; Stoja Rešković; Dušan Ćurčija; Ladislav Lazić; Tin Brlić

doi:10.3934/matersci.2019.4.601

AIMS Materials Science

2019, Volume 6, Issue 4: 601-609. doi: 10.3934/matersci.2019.4.601

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Modeling of stress distribution on the basis of the measured values of strain and temperature changes

1.
University of Zagreb Faculty of Metallurgy, Aleja narodnih heroja 3 Sisak, Croatia
2.
Croatian Metallurgical Society, Berislavićeva 6, 10000 Zagreb, Croatia

Received: 25 April 2019 Accepted: 03 June 2019 Published: 05 July 2019

This paper proposes a new mathematical model for calculation of stresses on the basis of experimentally measured values of strains and temperature changes for niobium microalloyed steel. Construction of model was done using a multiple regression analysis of the measured values of temperature change, deformation and stresses at four different stretching rates. All investigations were conducted on samples from the niobium microalloyed steel, using thermography and digital image correlation during static tensile testing. Constructed model was tested and validated on the experimentally obtained results. Model showed a good agreement of calculated stress values with experimentally obtained ones.
- stress,
- temperature change,
- strain,
- mathematical model,
- stretching rate
Citation: Ivan Jandrlić, Stoja Rešković, Dušan Ćurčija, Ladislav Lazić, Tin Brlić. Modeling of stress distribution on the basis of the measured values of strain and temperature changes[J]. AIMS Materials Science, 2019, 6(4): 601-609. doi: 10.3934/matersci.2019.4.601

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Abstract

This paper proposes a new mathematical model for calculation of stresses on the basis of experimentally measured values of strains and temperature changes for niobium microalloyed steel. Construction of model was done using a multiple regression analysis of the measured values of temperature change, deformation and stresses at four different stretching rates. All investigations were conducted on samples from the niobium microalloyed steel, using thermography and digital image correlation during static tensile testing. Constructed model was tested and validated on the experimentally obtained results. Model showed a good agreement of calculated stress values with experimentally obtained ones.

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