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Publications
Zhang. J., Kang, X.L., Shi, X.H., Guedes Soares, C. and Song, M. (2023), Low temperature effect on the mechnical properties of EH36 with strain rates, Journal of Marine Science and Engineering, Vol. 11, 678
A series quasi-static and dynamic tests are performed to investigate the behavior of EH36 steel at temperatures ranging from 20°C to -60°C. A formula is given to illustrate the relationship between the temperature reduction and the yield strength by fitting the experimental data including the three common constitutives rigid-perfectly plastic, elastic-perfectly plastic and multi-linear elastic plastic ones, which is used to simulate the static strength under loading. Additionally, the strain rate effect of EH36 steel at low temperatures are illustrated by the quasi-static and high-speed impact tests. A constitutive model including the low temperature and strain rate is introduced based on the modified Cowper-Symonds model. The coefficients of the constitutive model are fitted by the test results. It is improved by an iterative numerical method to more obtain accurate coefficients by a series numerical analysis. Detailed finite element simulations of the experiment conditions reveal that the constitutive model accurately predicts the dynamic response at low temperatures.
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