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Depth-dependent hysteresis in adhesive elastic contacts at large surface roughness
Contact force–indentation depth measurements in contact experiments involving compliant materials, such as polymers and gels, show a hysteresis loop whose size depends on the maximum indentation depth. This depth-dependent hysteresis (DDH) is not explained by classical contact mechanics theories and...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6367336/ https://www.ncbi.nlm.nih.gov/pubmed/30733488 http://dx.doi.org/10.1038/s41598-018-38212-z |
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author | Deng, Weilin Kesari, Haneesh |
author_facet | Deng, Weilin Kesari, Haneesh |
author_sort | Deng, Weilin |
collection | PubMed |
description | Contact force–indentation depth measurements in contact experiments involving compliant materials, such as polymers and gels, show a hysteresis loop whose size depends on the maximum indentation depth. This depth-dependent hysteresis (DDH) is not explained by classical contact mechanics theories and was believed to be due to effects such as material viscoelasticity, plasticity, surface polymer interdigitation, and moisture. It has been observed that the DDH energy loss initially increases and then decreases with roughness. A mechanics model based on the occurrence of adhesion and roughness related small-scale instabilities was presented by one of the authors for explaining DDH. However, that model only applies in the regime of infinitesimally small surface roughness, and consequently it does not capture the decrease in energy loss with surface roughness at the large roughness regime. We present a new mechanics model that applies in the regime of large surface roughness based on the Maugis–Dugdale theory of adhesive elastic contacts and Nayak’s theory of rough surfaces. The model captures the trend of decreasing energy loss with increasing roughness. It also captures the experimentally observed dependencies of energy loss on the maximum indentation depth, and material and surface properties. |
format | Online Article Text |
id | pubmed-6367336 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-63673362019-02-11 Depth-dependent hysteresis in adhesive elastic contacts at large surface roughness Deng, Weilin Kesari, Haneesh Sci Rep Article Contact force–indentation depth measurements in contact experiments involving compliant materials, such as polymers and gels, show a hysteresis loop whose size depends on the maximum indentation depth. This depth-dependent hysteresis (DDH) is not explained by classical contact mechanics theories and was believed to be due to effects such as material viscoelasticity, plasticity, surface polymer interdigitation, and moisture. It has been observed that the DDH energy loss initially increases and then decreases with roughness. A mechanics model based on the occurrence of adhesion and roughness related small-scale instabilities was presented by one of the authors for explaining DDH. However, that model only applies in the regime of infinitesimally small surface roughness, and consequently it does not capture the decrease in energy loss with surface roughness at the large roughness regime. We present a new mechanics model that applies in the regime of large surface roughness based on the Maugis–Dugdale theory of adhesive elastic contacts and Nayak’s theory of rough surfaces. The model captures the trend of decreasing energy loss with increasing roughness. It also captures the experimentally observed dependencies of energy loss on the maximum indentation depth, and material and surface properties. Nature Publishing Group UK 2019-02-07 /pmc/articles/PMC6367336/ /pubmed/30733488 http://dx.doi.org/10.1038/s41598-018-38212-z Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Deng, Weilin Kesari, Haneesh Depth-dependent hysteresis in adhesive elastic contacts at large surface roughness |
title | Depth-dependent hysteresis in adhesive elastic contacts at large surface roughness |
title_full | Depth-dependent hysteresis in adhesive elastic contacts at large surface roughness |
title_fullStr | Depth-dependent hysteresis in adhesive elastic contacts at large surface roughness |
title_full_unstemmed | Depth-dependent hysteresis in adhesive elastic contacts at large surface roughness |
title_short | Depth-dependent hysteresis in adhesive elastic contacts at large surface roughness |
title_sort | depth-dependent hysteresis in adhesive elastic contacts at large surface roughness |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6367336/ https://www.ncbi.nlm.nih.gov/pubmed/30733488 http://dx.doi.org/10.1038/s41598-018-38212-z |
work_keys_str_mv | AT dengweilin depthdependenthysteresisinadhesiveelasticcontactsatlargesurfaceroughness AT kesarihaneesh depthdependenthysteresisinadhesiveelasticcontactsatlargesurfaceroughness |