Enhancing the dynamic temperature stability of epoxy with graphene oxide

doi:10.1016/j.mechmat.2020.103593

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	Enhancing the dynamic temperature stability of epoxy with graphene oxide
	Qiao Y(乔宇); Wang PF ; Xue X ; Liu M ; Xu SL
发表期刊	MECHANICS OF MATERIALS
	2020-11-01
卷号	150 页码:103593
ISSN	0167-6636
摘要	Temperature-dependence mechanism of composites under dynamic loadings is essential for designing the aircraft with harsh operation environment. In this work, the dynamic compression mechanical behavior of graphene oxide modified epoxy (GO-epoxy) was systematically investigated over the temperature range from 298K to 423K under the loading strain rate of 5000 s(-1). The results indicate that the compression properties of GO-epoxy are sensitive to the strain rate and temperature. The yield strength of pure epoxy and GO-epoxy under dynamic loading were twice those under quasi-static loading. The strength gradually decreases as the temperature increases, but the temperature stability of GO-epoxy is significantly improved compared to the pure epoxy. The addition of GO helps to inhibit the movement of the molecular chain, suppress the stress softening, prevent the evolution of the micro-cracks and then increase the thermal stability of epoxy. The high speed photograph combined with the digital image correction (DIC) method indicates that GO improves the impact resistance of epoxy at different temperatures and the interfacial interactions contribute to this strengthening mechanism. A modified temperature and rate-dependent empirical constitutive model was developed to describe the dynamic behavior of pure/GO epoxy. The fracture morphologies show the difference failure modes between the GO-epoxy and the pure epoxy. This work on the temperature dependent dynamic behavior of GO modified epoxy could provide guidance for understanding the dynamic strengthening and thermal softening behaviors of nano-reinforcing composites.
关键词	Dynamic behavior STRAIN-RATE Temperature effect MECHANICAL-PROPERTIES Strain rate STRESS-RELAXATION Hopkinson bar CRACK-PROPAGATION Graphene oxide ALUMINUM FOAM BEHAVIOR DEFORMATION NANOCOMPOSITES MODEL
DOI	10.1016/j.mechmat.2020.103593
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000579506100024
WOS研究方向	Materials Science ; Mechanics
WOS类目	Materials Science, Multidisciplinary ; Mechanics
项目资助者	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [11872361, 11672286} ; Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities [WK2090050040, WK 2480000003} ; China Scholarship CouncilChina Scholarship Council
论文分区	二类/Q1
力学所作者排名	1
RpAuthor	Wang, PF ; Xu, SL
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/85430
专题	非线性力学国家重点实验室
作者单位	1.{Qiao Yu, Wang Pengfei, Xue Xiao, Xu Songlin} Univ Sci & Technol China Dept Modern Mech CAS Key Lab Mech Behav & Design Mat Hefei 230027 Peoples R China 2.{Qiao Yu} Chinese Acad Sci Inst Mech State Key Lab Nonlinear Mech Beijing 100190 Peoples R China 3.{Liu Mao} Swinburne Univ Technol Fac Sci Engn & Technol Hawthorn Vic 3122 Australia
推荐引用方式 GB/T 7714	Qiao Y,Wang PF,Xue X,et al. Enhancing the dynamic temperature stability of epoxy with graphene oxide[J]. MECHANICS OF MATERIALS,2020,150:103593.Rp_Au:Wang, PF, Xu, SL
APA	乔宇,Wang PF,Xue X,Liu M,&Xu SL.(2020).Enhancing the dynamic temperature stability of epoxy with graphene oxide.MECHANICS OF MATERIALS,150,103593.
MLA	乔宇,et al."Enhancing the dynamic temperature stability of epoxy with graphene oxide".MECHANICS OF MATERIALS 150(2020):103593.

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