Scaling laws and deformation mechanisms of nanoporous copper under adiabatic uniaxial strain compression

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	Scaling laws and deformation mechanisms of nanoporous copper under adiabatic uniaxial strain compression
	Yuan FP(袁福平); Wu XL(武晓雷); Fuping Yuan
发表期刊	Aip Advances
	2014-12
卷号	4 页码:127109
ISSN	2158-3226
摘要	A series of large-scale molecular dynamics simulations were conducted to investigate the scaling laws and the related atomistic deformation mechanisms of Cu monocrystal samples containing randomly placed nanovoids under adiabatic uniaxial strain compression. At onset of yielding, plastic deformation is accommodated by dislocations emitted from void surfaces as shear loops. The collapse of voids are observed by continuous emissions of dislocations from void surfaces and their interactions with further plastic deformation. The simulation results also suggest that the effect modulus, the yield stress and the energy aborption density of samples under uniaxial strain are linearly proportional to the relative density ρ. Moreover, the yield stress, the average flow stress and the energy aborption density of samples with the same relative density show a strong dependence on the void diameter d, expressed by exponential relations with decay coefficients much higher than -1/2. The corresponding atomistic mechanisms for scaling laws of the relative density and the void diameter were also presented. The present results should provide insights for understanding deformation mechanisms of nanoporous metals under extreme conditions.
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收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000347170100040
项目资助者	The authors would like to acknowledge the financial support of the National Key Basic Research Program of China (Grants No. 2012CB932203 and No. 2012CB937500) and NSFC (Grants No. 11222224, No. 11472286 and No. 11021262). The simulations reported were performed at Supercomputing Center of Chinese Academy of Sciences.
课题组名称	LNM材料介观力学性能的表征
论文分区	Q3
引用统计	被引频次：6[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/311007/49368
专题	非线性力学国家重点实验室
通讯作者	Fuping Yuan
推荐引用方式 GB/T 7714	Yuan FP,Wu XL,Fuping Yuan. Scaling laws and deformation mechanisms of nanoporous copper under adiabatic uniaxial strain compression[J]. Aip Advances,2014,4:127109.
APA	Yuan FP,Wu XL,&Fuping Yuan.(2014).Scaling laws and deformation mechanisms of nanoporous copper under adiabatic uniaxial strain compression.Aip Advances,4,127109.
MLA	Yuan FP,et al."Scaling laws and deformation mechanisms of nanoporous copper under adiabatic uniaxial strain compression".Aip Advances 4(2014):127109.

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