A numerical and experimental study of temperature effects on deformation behavior of carbon steels at high strain rates

19th Chemnitz Seminar on Materials Engineering – 19. Werkstofftechnisches Kolloquium

Pouya, M.^1 ; Winter, S.^1 ; Fritsch, S.^1 ; Wagner, M.F.-X.^1

Chemnitz University of Technology, Institute of Materials Science and Engineering, Chemnitz

09125, Germany^1

关键词: Compressive deformation behavior;    Experimental investigations;    Mechanical behavior of materials;    Numerical and experimental study;    Split Hopkinson pressure bars;    Strain-rate-dependent;    Temperature dependent behavior;    Wide temperature ranges;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/181/1/012022/pdf
DOI  :  10.1088/1757-899X/181/1/012022

来源: IOP

【 摘 要 】

Both in research and in the light of industrial applications, there is a growing interest in methods to characterize the mechanical behavior of materials at high strain rates. This is particularly true for steels (the most important structural materials), where often the strain rate-dependent material behavior also needs to be characterized in a wide temperature range. In this study, we use the Finite Element Method (FEM), first, to model the compressive deformation behavior of carbon steels under quasi-static loading conditions. The results are then compared to experimental data (for a simple C75 steel) at room temperature, and up to testing temperatures of 1000 °C. Second, an explicit FEM model that captures wave propagation phenomena during dynamic loading is developed to closely reflect the complex loading conditions in a Split-Hopkinson Pressure Bar (SHPB) - an experimental setup that allows loading of compression samples with strain rates up to 104s-1The dynamic simulations provide a useful basis for an accurate analysis of dynamically measured experimental data, which considers reflected elastic waves. By combining numerical and experimental investigations, we derive material parameters that capture the strain rate- and temperature-dependent behavior of the C75 steel from room temperature to 1000 °C, and from quasi-static to dynamic loading.