Dynamic mechanical response, energy absorption capacity, and constitutive modeling of polypropylene fiber-reinforced foamed concrete under high temperature
文献类型：期刊论文
| 作者 | Chen, Longyang; Li PH(李鹏辉); Guo, Weiguo; Zhang, Dongjian; Wang, Ruifeng ; Gao, Meng
|
| 刊名 | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
 |
| 出版日期 | 2024-05-01 |
| 卷号 | 30页码:807-822 |
| 关键词 | Foamed concrete High temperature Dynamic increase factor Energy absorption capacity High strain rate Dynamic constitutive model |
| ISSN号 | 2238-7854 |
| DOI | 10.1016/j.jmrt.2024.03.124 |
| 通讯作者 | Li, Penghui(liph@imech.ac.cn) ; Guo, Weiguo(weiguo@nwpu.edu.cn) |
| 英文摘要 | This study utilized a modified split Hopkinson pressure bar apparatus to subject polypropylene fiber-reinforced foamed concrete (PPFRFC) to substantial deformation loading at high temperatures and strain rates. Based on experimental results, the study systematically investigated the coupled effects of temperature and strain rate on the dynamic mechanical behavior of PPFRFC across a broad range of strain rates (0.001 s-1 to 1300 s-1) and temperatures (25 degrees C-600 degrees C). The findings revealed that elevated temperatures significantly affected various mechanical parameters including peak stress, plateau stress, elastic modulus, densification strain, dynamic increase factor (DIF), and energy absorption. Notably, with increasing temperature, the strain rate amplified the peak stress, plateau stress, and energy absorption, whereas its influence on the elastic modulus diminished. Microstructural examination revealed the absence of notable cracks in the pore walls after high-temperatures exposure. However, degradation of the cement matrix results in a loose skeleton structure within the pore walls, leading to a considerable reduction in material strength. Finally, a constitutive model was developed, considering the coupling effects of temperature and strain rate. This model accurately describes the mechanical response of the PPFRFC across various stages, including the elastic, plateau, and densification stages, as well as the stress drop behavior in the transition stage. Moreover, it effectively reflects the influence of strain rate and temperature coupling effects on the material's mechanical properties. |
| 分类号 | 一类 |
| WOS关键词 | COMPRESSIVE BEHAVIOR ; STRENGTH ENHANCEMENT ; ALUMINUM FOAMS ; POROSITY ; COMPOSITE |
| 资助项目 | National Natural Science Foundation of China[12072287] ; National Natural Science Foundation of China[12372365] ; Innovation Foundation for Doctor Dissertation of Northwestern Poly-technical University[CX2021043] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001219473800001 |
| 资助机构 | National Natural Science Foundation of China ; Innovation Foundation for Doctor Dissertation of Northwestern Poly-technical University |
| 其他责任者 | Li, Penghui ; Guo, Weiguo |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/95274]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Chen, Longyang,Li PH,Guo, Weiguo,et al. Dynamic mechanical response, energy absorption capacity, and constitutive modeling of polypropylene fiber-reinforced foamed concrete under high temperature[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,30:807-822. |
| APA | Chen, Longyang,李鹏辉,Guo, Weiguo,Zhang, Dongjian,Wang, Ruifeng,&Gao, Meng.(2024).Dynamic mechanical response, energy absorption capacity, and constitutive modeling of polypropylene fiber-reinforced foamed concrete under high temperature.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,30,807-822. |
| MLA | Chen, Longyang,et al."Dynamic mechanical response, energy absorption capacity, and constitutive modeling of polypropylene fiber-reinforced foamed concrete under high temperature".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 30(2024):807-822. |
入库方式： OAI收割
来源：力学研究所
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