| High-throughput screening the micro-mechanical properties of polyimide matrix composites at elevated temperatures | |
| Shen, Sijia1; Li, Hongbo1; Yang, Lingwei2; Li N(李娜)3; Wu, Jinting1; Zhao, Tingxing1 | |
| 通讯作者 | Li, Hongbo(li-honggg@163.com) ; Yang, Lingwei(lingwei.yang@cardc.cn) |
| 发表期刊 | POLYMER TESTING
 |
| 2022-03-01 | |
| 卷号 | 107页码:8 |
| ISSN | 0142-9418 |
| 摘要 | In this work, a novel high-throughput methodology based on combinations of nanoindentation, indentation creep and push-in methods, is proposed to measure in-situ the micro-mechanical properties of typical polymer matrix composites at a wide temperature range. The Young's modulus and strain rate sensitivity of a polyimide matrix and the interfacial shear strength in a quartz fiber reinforced polyimide matrix composite are measured at 25-350 degrees C for the first time. The results highlight a linear softening of the polyimide matrix at high temperatures, which is evidenced by the approximate linear decrease of Young's modulus from approximate to 5.0 GPa at 25 degrees C to approximate to 1.1 GPa at 350 degrees C. In comparison, the strain rate sensitivity of the polyimide matrix is increased, from approximate to 0.032 at 25 degrees C to approximate to 0.062 at 350 degrees C. This evidences a stronger visco-plasticity of polyimide at higher temperatures. The shear strength of the fiber/matrix interface is also temperature dependent. As the testing temperature increases from 25 to 300 degrees C, the shear strength is decreased from approximate to 147 MPa to approximate to 40 MPa. Specially, the interfacial strength is extremely low at 350 degrees C (approximate to 4 MPa), evidencing a failure of the composite at this temperature. |
| 关键词 | Polyimide Nanoindentation Interface Micro-mechanics High temperature mechanics |
| DOI | 10.1016/j.polymertesting.2022.107483 |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000765380600009 |
| 关键词[WOS] | STRAIN-RATE SENSITIVITY ; SHEAR-STRENGTH ; PUSH-IN ; NANOINDENTATION ; BEHAVIOR ; TESTS |
| WOS研究方向 | Materials Science ; Polymer Science |
| WOS类目 | Materials Science, Characterization & Testing ; Polymer Science |
| 资助项目 | National Natural Science Foundation of China[11902333] |
| 项目资助者 | National Natural Science Foundation of China |
| 论文分区 | 一类 |
| 力学所作者排名 | 3+ |
| RpAuthor | Li, Hongbo ; Yang, Lingwei |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/88767 |
| 专题 | 非线性力学国家重点实验室 |
| 作者单位 | 1.Southwest Univ Sci & Technol, Sch Mat Sci & Engn, Mianyang 621000, Sichuan, Peoples R China; 2.China Aerodynam Res & Dev Ctr, Hyperveloc Aerodynam Inst, Mianyang 621000, Sichuan, Peoples R China; 3.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shen, Sijia,Li, Hongbo,Yang, Lingwei,et al. High-throughput screening the micro-mechanical properties of polyimide matrix composites at elevated temperatures[J]. POLYMER TESTING,2022,107:8. |
| APA | Shen, Sijia,Li, Hongbo,Yang, Lingwei,李娜,Wu, Jinting,&Zhao, Tingxing.(2022).High-throughput screening the micro-mechanical properties of polyimide matrix composites at elevated temperatures.POLYMER TESTING,107,8. |
| MLA | Shen, Sijia,et al."High-throughput screening the micro-mechanical properties of polyimide matrix composites at elevated temperatures".POLYMER TESTING 107(2022):8. |
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