Molecular-Dynamics Simulations of the Emergence of Surface Roughness in a Polymer under Compression
Roughness of surfaces is both surprisingly ubiquitous on all length scales and extremely relevant practically. The appearance of multi-scale roughness has been linked to avalanches and plastic deformation in metals. However, other, more-complex materials have mechanisms of plasticity that are signif...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-11-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/23/7327 |
| _version_ | 1797507486251483136 |
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| author | Robin Vacher Astrid S. de Wijn |
| author_facet | Robin Vacher Astrid S. de Wijn |
| author_sort | Robin Vacher |
| collection | DOAJ |
| description | Roughness of surfaces is both surprisingly ubiquitous on all length scales and extremely relevant practically. The appearance of multi-scale roughness has been linked to avalanches and plastic deformation in metals. However, other, more-complex materials have mechanisms of plasticity that are significantly different from those of metals. We investigated the emergence of roughness in a polymer under compression. We performed molecular-dynamics simulations of a slab of solid polyvinyl alcohol that was compressed bi-axially, and we characterised the evolution of the surface roughness. We found significantly different behaviour than what was previously observed in similar simulations of metals. We investigated the differences and argue that the visco-elasticity of the material plays a crucial role. |
| first_indexed | 2024-03-10T04:49:09Z |
| format | Article |
| id | doaj.art-37edc6ffe3e04993be6a4d08a70742b8 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T04:49:09Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-37edc6ffe3e04993be6a4d08a70742b82023-11-23T02:41:46ZengMDPI AGMaterials1996-19442021-11-011423732710.3390/ma14237327Molecular-Dynamics Simulations of the Emergence of Surface Roughness in a Polymer under CompressionRobin Vacher0Astrid S. de Wijn1SINTEF, SINTEF Industry Materials and Nanotechnology, 7034 Trondheim, NorwayPorelab and Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology, 7491 Trondheim, NorwayRoughness of surfaces is both surprisingly ubiquitous on all length scales and extremely relevant practically. The appearance of multi-scale roughness has been linked to avalanches and plastic deformation in metals. However, other, more-complex materials have mechanisms of plasticity that are significantly different from those of metals. We investigated the emergence of roughness in a polymer under compression. We performed molecular-dynamics simulations of a slab of solid polyvinyl alcohol that was compressed bi-axially, and we characterised the evolution of the surface roughness. We found significantly different behaviour than what was previously observed in similar simulations of metals. We investigated the differences and argue that the visco-elasticity of the material plays a crucial role.https://www.mdpi.com/1996-1944/14/23/7327polymerroughnessmolecular dynamics |
| spellingShingle | Robin Vacher Astrid S. de Wijn Molecular-Dynamics Simulations of the Emergence of Surface Roughness in a Polymer under Compression Materials polymer roughness molecular dynamics |
| title | Molecular-Dynamics Simulations of the Emergence of Surface Roughness in a Polymer under Compression |
| title_full | Molecular-Dynamics Simulations of the Emergence of Surface Roughness in a Polymer under Compression |
| title_fullStr | Molecular-Dynamics Simulations of the Emergence of Surface Roughness in a Polymer under Compression |
| title_full_unstemmed | Molecular-Dynamics Simulations of the Emergence of Surface Roughness in a Polymer under Compression |
| title_short | Molecular-Dynamics Simulations of the Emergence of Surface Roughness in a Polymer under Compression |
| title_sort | molecular dynamics simulations of the emergence of surface roughness in a polymer under compression |
| topic | polymer roughness molecular dynamics |
| url | https://www.mdpi.com/1996-1944/14/23/7327 |
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