Viscoelastic material properties determine contact mechanics of hydrogel spheres
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909149151887360 |
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| author | Shakya, Chandan van der Gucht, Jasper Dijksman, Joshua A. |
| author_facet | Shakya, Chandan van der Gucht, Jasper Dijksman, Joshua A. |
| contents | Granular materials are ubiquitous in nature and industry; their mechanical behavior has been of academic and engineering interest for centuries. One of the reasons for their rather complex mechanical behavior is that stresses exerted on a granular material propagate only through contacts between the grains. These contacts can change as the packing evolves. This makes any deformation and mechanical response from a granular packing a function of the nature of contacts between the grains and the material response of the material the grains are made of. We present a study in which we isolate the role of the grain material in the contact forces acting between two particles sliding past each other. We use hydrogel particles and find that a viscoelastic material model, in which the shear modulus decays with time, coupled with a simple Coulomb friction model captures the experimental results. The results suggest that the particle material evolution itself may play a role in the collective behavior of granular materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_16105 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Viscoelastic material properties determine contact mechanics of hydrogel spheres Shakya, Chandan van der Gucht, Jasper Dijksman, Joshua A. Soft Condensed Matter Granular materials are ubiquitous in nature and industry; their mechanical behavior has been of academic and engineering interest for centuries. One of the reasons for their rather complex mechanical behavior is that stresses exerted on a granular material propagate only through contacts between the grains. These contacts can change as the packing evolves. This makes any deformation and mechanical response from a granular packing a function of the nature of contacts between the grains and the material response of the material the grains are made of. We present a study in which we isolate the role of the grain material in the contact forces acting between two particles sliding past each other. We use hydrogel particles and find that a viscoelastic material model, in which the shear modulus decays with time, coupled with a simple Coulomb friction model captures the experimental results. The results suggest that the particle material evolution itself may play a role in the collective behavior of granular materials. |
| title | Viscoelastic material properties determine contact mechanics of hydrogel spheres |
| topic | Soft Condensed Matter |
| url | https://arxiv.org/abs/2403.16105 |