Rate-dependent constitutive models of S690 high-strength structural steel

Yang, Xiaoqiang; Hua, Yang; Zhang, Sumei

doi:10.1016/j.conbuildmat.2018.11.285

Cited by 66 publications

(32 citation statements)

References 24 publications

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“…In the standard J-C model, C is regarded as a constant. However, the relationships described by Equations (13) and (14) are nonlinear in some cases, and thus C is modified as a variable related to the strain rate [26,27]. Whether C is a variable is dependent on the behavior of steel material.…”

Section: Johnson-cook (J-c) Modelmentioning

confidence: 99%

“…There exist two methods to determine C [26][27][28][29], which correspond to Equations (13) and (14) respectively:…”

Section: Johnson-cook (J-c) Modelmentioning

confidence: 99%

“…(2) σ and σ s are taken as the dynamic and quasi-static flow stress related to plastic strain, respectively [26,29]. The ratio σ/σ s at the same true plastic strain was firstly calculated.…”

Section: Johnson-cook (J-c) Modelmentioning

confidence: 99%

“…There exist two methods to determine C [26][27][28][29], which correspond to Equations (13) and (14) respectively: (1) σ and σs are taken as the dynamic and quasi-static yield stress respectively [27,28], which are corresponding to zero plastic strain. Thus, σ/σs represents the DIFy.…”

Section: Johnson-cook (J-c) Modelmentioning

confidence: 99%

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Dynamic Tensile Behavior of Steel HRB500E Reinforcing Bar at Low, Medium, and High Strain Rates

et al. 2020

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The strain rate effect of engineering materials should be considered in the assessment of the performance of reinforced concrete (RC) structures under extreme dynamic loads such as blast and impact. However, the strain rate behavior of 500 MPa-grade anti-earthquake hot-rolled high-strength ribbed bar (HRB500E), used in critical RC members to improve the anti-earthquake performance, has not been investigated and reported in the open literature. That restricts its application in RC structures subjected to extreme dynamic loads. In this paper, dynamic tensile tests of HRB500E steel were conducted using an electromechanical universal testing machine and a servo-hydraulic high-speed testing machine. The stress–strain curves at strain rates ranging from 0.00025 to 550 s−1 were obtained where HRB500E steel was found significantly sensitive to strain rate. Existing formulations to evaluate the dynamic increase factor for yield stress (DIFy) are found to be not suitable for HRB500E steel, thus the widely used Cowper–Symonds and Malvar models for predicting the DIFy were modified based on the test results. Furthermore, the parameter of the Mander material model for describing engineering stress–strain relationship was also calibrated. Finally, the Johnson-Cook and proposed constitutive models for the true stress–strain relationship were examined. The proposed constitutive model can provide better prediction accuracy for yield stress than the Johnson-Cook model.

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Section: Johnson-cook (J-c) Modelmentioning

confidence: 99%

“…There exist two methods to determine C [26][27][28][29], which correspond to Equations (13) and (14) respectively:…”

Section: Johnson-cook (J-c) Modelmentioning

confidence: 99%

Section: Johnson-cook (J-c) Modelmentioning

confidence: 99%

Section: Johnson-cook (J-c) Modelmentioning

confidence: 99%

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Dynamic Tensile Behavior of Steel HRB500E Reinforcing Bar at Low, Medium, and High Strain Rates

et al. 2020

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“…Yang [8] investigated the sensitivity of the strain rate of S690 structural steel and developed a new Cowper-Symonds model to predict the dynamic increase factor and used the J-C model to fit true stress-strain curves. Amitava [9] predicted the thermal deformation behavior of aluminum 5083 by using J-C, Z-A, and strain-compensated Arrhenius models.…”

Section: Introductionmentioning

confidence: 99%

Research on M‐Paul Dynamic Constitutive Relation of Q235B Steel

Lin

Huang

Xiao

et al. 2019

Advances in Civil Engineering

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In recent years, terrorist attacks and regional conflicts have increased and research on the resistance of building structures has been more highlighted. Q235B is a commonly used steel type in building structures, and there is an urgent need for research on its dynamic material properties. In this paper, Paul constitutive model was calibrated based on the material properties of Q235B steel. Based on the obtained results, it was found that the original model was not able to take into account temperature-softening effect. Therefore, a temperature-softening parameter was added into the temperature term of the original Paul model, and the modified M-Paul constitutive model was developed. Then, numerical prediction results obtained from Q235B steel penetration experiments using J-C (Johnson–Cook) and M-Paul constitutive models were compared. It was observed that J-C constitutive model significantly overestimated ballistic limit while estimations obtained from M-Paul constitutive model were closer to experimental results. This observation verified the correctness and effectiveness of M-Paul model and established a solid foundation for relevant research works on the impact resistance of building structures.

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