Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Dynamic tensile behavior of S690 high-strength structural steel at intermediate strain rates
Abstract This paper investigates the rate-dependent behavior of S690 high-strength structural steel at intermediate strain rates. Experimental tests consisting of seven groups of specimens were first conducted, and stress-strain curves at different intermediate strain rates were obtained. The tests indicated that the strain rate had an obvious influence on the behavior of S690 steel, i.e., both the yield stress and tensile strength increased remarkably with increasing strain rate. The test results were then used to determine the coefficients of two commonly used rate-dependent models, i.e., the Cowper-Symonds (C-S) model and the Johnson-Cook (J-C) model. A new modified J-C model was also proposed to predict the true stress-strain behavior of S690 steel at intermediate and high strain rates (up to 4109 s−1). The accuracy of the proposed models was verified by comparing them with test results.
Highlights High-speed tensile tests of S690 steel at intermediate strain rates were conducted. Stress-strain curves at various strain rates were obtained, and its rate behavior was discussed. DIFy and DIFu were obtained, and C-S models were fitted to predict the strain rate behavior. J-C model was fitted at intermediate strain rates and further modified to cover high strain rates.
Dynamic tensile behavior of S690 high-strength structural steel at intermediate strain rates
Abstract This paper investigates the rate-dependent behavior of S690 high-strength structural steel at intermediate strain rates. Experimental tests consisting of seven groups of specimens were first conducted, and stress-strain curves at different intermediate strain rates were obtained. The tests indicated that the strain rate had an obvious influence on the behavior of S690 steel, i.e., both the yield stress and tensile strength increased remarkably with increasing strain rate. The test results were then used to determine the coefficients of two commonly used rate-dependent models, i.e., the Cowper-Symonds (C-S) model and the Johnson-Cook (J-C) model. A new modified J-C model was also proposed to predict the true stress-strain behavior of S690 steel at intermediate and high strain rates (up to 4109 s−1). The accuracy of the proposed models was verified by comparing them with test results.
Highlights High-speed tensile tests of S690 steel at intermediate strain rates were conducted. Stress-strain curves at various strain rates were obtained, and its rate behavior was discussed. DIFy and DIFu were obtained, and C-S models were fitted to predict the strain rate behavior. J-C model was fitted at intermediate strain rates and further modified to cover high strain rates.
Dynamic tensile behavior of S690 high-strength structural steel at intermediate strain rates
Yang, Xiaoqiang (Autor:in) / Yang, Hua (Autor:in) / Lai, Zhichao (Autor:in) / Zhang, Sumei (Autor:in)
30.01.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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