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dc.contributor.authorLin, H.
dc.contributor.authorLu, Chunsheng
dc.contributor.authorWang, H.Y.
dc.contributor.authorDai, L.H.
dc.date.accessioned2020-09-17T02:44:41Z
dc.date.available2020-09-17T02:44:41Z
dc.date.issued2020
dc.identifier.citationLin, H. and Lu, C. and Wang, H.Y. and Dai, L.H. 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): Article No. 20200186.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/81072
dc.identifier.doi10.1098/rspa.2020.0186
dc.description.abstract

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.

dc.languageEnglish
dc.publisherROYAL SOC
dc.subjectScience & Technology
dc.subjectMultidisciplinary Sciences
dc.subjectScience & Technology - Other Topics
dc.subjectmetallic glass foam
dc.subjectshear banding
dc.subjectavalanches
dc.subjectMEAN-FIELD THEORY
dc.subjectAFTERSHOCK SEQUENCES
dc.subjectRAPID SHEAR
dc.subjectDEFORMATION
dc.subjectFAILURE
dc.subjectLOCALIZATION
dc.subjectGROWTH
dc.subjectSTABILITY
dc.subjectPARKFIELD
dc.subjectMODEL
dc.titleNon-trivial avalanches triggered by shear banding in compression of metallic glass foams
dc.typeJournal Article
dcterms.source.volume476
dcterms.source.number2240
dcterms.source.issn1364-5021
dcterms.source.titleProceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
dc.date.updated2020-09-17T02:44:41Z
curtin.departmentSchool of Civil and Mechanical Engineering
curtin.accessStatusIn process
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidLu, Chunsheng [0000-0002-7368-8104]
curtin.identifier.article-numberARTN 20200186
dcterms.source.eissn1471-2946
curtin.contributor.scopusauthoridLu, Chunsheng [57061177000]


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