IMECH-IR  > 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 C3; Wang HY(汪海英)1,2; Dai LH(戴兰宏)1,2
Corresponding AuthorLin, H.(linhao@imech.ac.cn) ; Dai, L. H.(lhdai@lnm.imech.ac.cn)
Source PublicationPROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
2020-08-26
Volume476Issue:2240Pages:19
ISSN1364-5021
AbstractDuctile 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.
Keywordmetallic glass foam shear banding avalanches
DOI10.1098/rspa.2020.0186
Indexed BySCI ; EI
Language英语
WOS IDWOS:000564233400001
WOS KeywordMEAN-FIELD THEORY ; AFTERSHOCK SEQUENCES ; RAPID SHEAR ; DEFORMATION ; FAILURE ; LOCALIZATION ; GROWTH ; STABILITY ; PARKFIELD ; MODEL
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
Funding ProjectNational 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]
Funding OrganizationNational 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)
Classification二类
Ranking1
ContributorLin, H. ; Dai, L. H.
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/84987
Collection非线性力学国家重点实验室
Affiliation1.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
Recommended Citation
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.
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