Non-trivial avalanches triggered by shear banding in compression of metallic glass foams
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 multipl...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
ROYAL SOC
2020
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/81072 |
| _version_ | 1848764311515693056 |
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| author | Lin, H. Lu, Chunsheng Wang, H.Y. Dai, L.H. |
| author_facet | Lin, H. Lu, Chunsheng Wang, H.Y. Dai, L.H. |
| author_sort | Lin, H. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-14T11:17:20Z |
| format | Journal Article |
| id | curtin-20.500.11937-81072 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:17:20Z |
| publishDate | 2020 |
| publisher | ROYAL SOC |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-810722021-01-19T02:05:55Z Non-trivial avalanches triggered by shear banding in compression of metallic glass foams Lin, H. Lu, Chunsheng Wang, H.Y. Dai, L.H. Science & Technology Multidisciplinary Sciences Science & Technology - Other Topics metallic glass foam shear banding avalanches MEAN-FIELD THEORY AFTERSHOCK SEQUENCES RAPID SHEAR DEFORMATION FAILURE LOCALIZATION GROWTH STABILITY PARKFIELD MODEL 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. 2020 Journal Article http://hdl.handle.net/20.500.11937/81072 10.1098/rspa.2020.0186 English ROYAL SOC restricted |
| spellingShingle | Science & Technology Multidisciplinary Sciences Science & Technology - Other Topics metallic glass foam shear banding avalanches MEAN-FIELD THEORY AFTERSHOCK SEQUENCES RAPID SHEAR DEFORMATION FAILURE LOCALIZATION GROWTH STABILITY PARKFIELD MODEL Lin, H. Lu, Chunsheng Wang, H.Y. Dai, L.H. Non-trivial avalanches triggered by shear banding in compression of metallic glass foams |
| title | Non-trivial avalanches triggered by shear banding in compression of metallic glass foams |
| title_full | Non-trivial avalanches triggered by shear banding in compression of metallic glass foams |
| title_fullStr | Non-trivial avalanches triggered by shear banding in compression of metallic glass foams |
| title_full_unstemmed | Non-trivial avalanches triggered by shear banding in compression of metallic glass foams |
| title_short | Non-trivial avalanches triggered by shear banding in compression of metallic glass foams |
| title_sort | non-trivial avalanches triggered by shear banding in compression of metallic glass foams |
| topic | Science & Technology Multidisciplinary Sciences Science & Technology - Other Topics metallic glass foam shear banding avalanches MEAN-FIELD THEORY AFTERSHOCK SEQUENCES RAPID SHEAR DEFORMATION FAILURE LOCALIZATION GROWTH STABILITY PARKFIELD MODEL |
| url | http://hdl.handle.net/20.500.11937/81072 |