Open AccessElasto-plastic constitutive relation of low temperature marine steel EH36
Author(s) -
Kuangjie Zhao,
Xianru Liu,
Jianguang Li
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2200/1/012026
Subject(s) - constitutive equation , hull , materials science , collision , ultimate tensile strength , structural engineering , mechanics , composite material , engineering , finite element method , computer science , physics , computer security
In order to consider the characteristics of materials and the impact of sea ice collision in the calculation of ultimate strength of stiffened plates, based on the study of dynamic constitutive models of sea ice and polar marine steel at low temperature, this paper explores the calculation model of ultimate strength of stiffened plates for hull with collision dents considering the effects of low temperature and strain rate of steel. A constitutive model of EH36 steel considering low temperature effect is proposed, which has practical engineering value. According to the quasi-static tensile test results of EH36 steel at different temperatures, the relation formula of the influence of temperature reduction on the yield strength of EH36 steel was fitted. Based on the test data and Cowper-Symonds model, a constitutive model of EH36 steel considering low temperature effect is proposed, and the constitutive model is applied to the test simulation calculation, which proves that the dynamic constitutive model of EH36 steel has practical engineering value.