Non-trivial avalanches triggered by shear banding in compression of metallic glass foams

doi:10.1098/rspa.2020.0186

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

	Non-trivial avalanches triggered by shear banding in compression of metallic glass foams
	Lin H(林浩)1,2; Lu C 3; Wang HY(汪海英)1,2; Dai LH(戴兰宏)1,2
刊名	PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
	2020-08-26
卷号	476 期号:2240 页码:19
关键词	metallic glass foam shear banding avalanches
ISSN号	1364-5021
DOI	10.1098/rspa.2020.0186
通讯作者	Lin, H.(linhao@imech.ac.cn) ; Dai, L. H.(lhdai@lnm.imech.ac.cn)
英文摘要	Ductile metallic glass foams (DMGFs) are a new type of structural material with a perfect combination of high strength and toughness. Owing to their disordered atomic-scale microstructures and randomly distributed macroscopic voids, the compressive deformation of DMGFs proceeds through multiple nanoscale shear bands accompanied by local fracture of cellular structures, which induces avalanche-like intermittences in stress-strain curves. In this paper, we present a statistical analysis, including distributions of avalanche size, energy dissipation, waiting times and aftershock sequence, on such a complex dynamic process, which is dominated by shear banding. After eliminating the influence of structural disorder, we demonstrate that, in contrast to the mean-field results of their brittle counterparts, scaling laws in DMGFs are characterized by different exponents. It is shown that the occurrence of non-trivial scaling behaviours is attributed to the localized plastic yielding, which effectively prevents the system from building up a long-range correlation. This accounts for the high structural stability and energy absorption performance of DMGFs. Furthermore, our results suggest that such shear banding dynamics introduce an additional characteristic time scale, which leads to a universal gamma distribution of waiting times.
分类号	二类
资助项目	National Key Research and Development Program of China[2017YFB0702003] ; National Key Research and Development Program of China[2017YFB0701502] ; National Natural Science Foundation of China[11672316] ; National Natural Science Foundation of China[11790292] ; Science Challenge Project[TZ2016001] ; Opening Fund of State Key Laboratory of Nonlinear Mechanics ; Open Fund of State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology (Beijing)[SKLGDUEK1516]
WOS关键词	MEAN-FIELD THEORY ; AFTERSHOCK SEQUENCES ; RAPID SHEAR ; DEFORMATION ; FAILURE ; LOCALIZATION ; GROWTH ; STABILITY ; PARKFIELD ; MODEL
WOS研究方向	Science & Technology - Other Topics
语种	英语
WOS记录号	WOS:000564233400001
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Science Challenge Project ; Opening Fund of State Key Laboratory of Nonlinear Mechanics ; Open Fund of State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology (Beijing)
其他责任者	Lin, H. ; Dai, L. H.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/84986]
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, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China; 3.Curtin Univ, Sch Civil & Mech Engn, Perth, WA 6845, Australia
推荐引用方式 GB/T 7714	Lin H,Lu C,Wang HY,et al. Non-trivial avalanches triggered by shear banding in compression of metallic glass foams[J]. PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES,2020,476(2240):19.
APA	林浩,Lu C,汪海英,&戴兰宏.(2020).Non-trivial avalanches triggered by shear banding in compression of metallic glass foams.PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES,476(2240),19.
MLA	林浩,et al."Non-trivial avalanches triggered by shear banding in compression of metallic glass foams".PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES 476.2240(2020):19.