4.7 Article

Evaluation of typical dynamic damage models used for UHPC based on SHPB technology

期刊

ENGINEERING FRACTURE MECHANICS
卷 269, 期 -, 页码 -

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2022.108562

关键词

UHPC; SHPB; Evaluation; HJC model

资金

  1. National Natural Science Foundation of China [52068024]
  2. Natural Science Foundation of Jiangxi Province [20192BAB206042]
  3. key Research and Development Foundation of Jiangxi Province [20202BBG73035]

向作者/读者索取更多资源

This paper evaluates the feasibility of typical dynamic damage models used for UHPC based on SHPB technology and verifies the accuracy of the models through a comparison with measured waveforms.
This paper focuses on evaluating the feasibility of typical dynamic damage models used for ultrahigh performance concrete (UHPC) based on split Hopkinson pressure bar (SHPB) technology. The material characteristics of the UHPC are assigned by modifying the critical parameters of the Holmquist Johnson Cook (HJC) and the Karagozian and Case concrete (K&C) models in LS-DYNA software. The dynamic analysis methods of the UHPC using SHPB technique under the two typical dynamic damage models are established. The validations of the calibrated K&C and HJC models used in UHPC are evaluated by a comparison with the measured waveform. The results indicate that (1) the recommended strength parameter A in the HJC model is 1.54 for obtaining realistic dynamic damage behavior of UHPC at a compressive strength of 200 MPa; (2) based on the appropriate calibrated parameter values, the numerical simulation using the K&C or HJC models can predict the measured waveform of UHPC on the SHPB test with an acceptable accuracy; and (3) compared to the K&C model, the fluctuation of the calculated waveform based on the HJC model is more apparent, and the calculated residual transmitted waveform in the descending stage demonstrates a larger deviation from the measured waveform.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据