High-throughput screening the micro-mechanical properties of polyimide matrix composites at elevated temperatures

doi:10.1016/j.polymertesting.2022.107483

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	High-throughput screening the micro-mechanical properties of polyimide matrix composites at elevated temperatures
	Shen, Sijia 3; Li, Hongbo 3; Yang, Lingwei 2; Li N(李娜)1; Wu, Jinting 3; Zhao, Tingxing 3
刊名	POLYMER TESTING
	2022-03-01
卷号	107 页码:8
关键词	Polyimide Nanoindentation Interface Micro-mechanics High temperature mechanics
ISSN号	0142-9418
DOI	10.1016/j.polymertesting.2022.107483
通讯作者	Li, Hongbo(li-honggg@163.com) ; Yang, Lingwei(lingwei.yang@cardc.cn)
英文摘要	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.
分类号	一类
资助项目	National Natural Science Foundation of China[11902333]
WOS关键词	STRAIN-RATE SENSITIVITY ; SHEAR-STRENGTH ; PUSH-IN ; NANOINDENTATION ; BEHAVIOR ; TESTS
WOS研究方向	Materials Science ; Polymer Science
语种	英语
WOS记录号	WOS:000765380600009
资助机构	National Natural Science Foundation of China
其他责任者	Li, Hongbo ; Yang, Lingwei
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/88766]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China 2.China Aerodynam Res & Dev Ctr, Hyperveloc Aerodynam Inst, Mianyang 621000, Sichuan, Peoples R China; 3.Southwest Univ Sci & Technol, Sch Mat Sci & Engn, Mianyang 621000, Sichuan, 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.