Effect of Transversely Isotropic Elasticity on Elastohydrodynamic Lubrication of Point Contacts
Fiber-reinforced materials or 3D printed parts feature transversely isotropic elasticity. Although its influence on pressures, shapes, and sizes has been studied extensively for dry contacts, the transferability to lubricated contacts is fragmented. This numerical study investigates how the content...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-08-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/17/3507 |
| _version_ | 1797493578276012032 |
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| author | Enzo Maier Moritz Lengmüller Thomas Lohner |
| author_facet | Enzo Maier Moritz Lengmüller Thomas Lohner |
| author_sort | Enzo Maier |
| collection | DOAJ |
| description | Fiber-reinforced materials or 3D printed parts feature transversely isotropic elasticity. Although its influence on pressures, shapes, and sizes has been studied extensively for dry contacts, the transferability to lubricated contacts is fragmented. This numerical study investigates how the content and orientation of short fibers in fiber-reinforced polymers (FRP) affect elastohydrodynamic lubrication (EHL) of point contacts. Material properties are modeled with Tandon-Weng homogenization. For EHL modeling, a fully-coupled approach based on finite element discretization is used. Results on hydrodynamic pressure and film thickness as well as material stress distribution are analyzed and compared to common approximations using the effective contact moduli. It is shown that the combination of fiber content and orientation defines the effective contact stiffness that determines the contact shape, size, and film thickness. Furthermore, the contact regime can change if a contact-specific stiffness threshold is reached. |
| first_indexed | 2024-03-10T01:22:01Z |
| format | Article |
| id | doaj.art-7e64559529d24723ad83758abdf8b9e7 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T01:22:01Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-7e64559529d24723ad83758abdf8b9e72023-11-23T13:58:02ZengMDPI AGPolymers2073-43602022-08-011417350710.3390/polym14173507Effect of Transversely Isotropic Elasticity on Elastohydrodynamic Lubrication of Point ContactsEnzo Maier0Moritz Lengmüller1Thomas Lohner2Gear Research Center (FZG), Department of Mechanical Engineering, School of Engineering and Design, Technical University of Munich, Boltzmannstr. 15, D-85748 Garching near Munich, GermanyGear Research Center (FZG), Department of Mechanical Engineering, School of Engineering and Design, Technical University of Munich, Boltzmannstr. 15, D-85748 Garching near Munich, GermanyGear Research Center (FZG), Department of Mechanical Engineering, School of Engineering and Design, Technical University of Munich, Boltzmannstr. 15, D-85748 Garching near Munich, GermanyFiber-reinforced materials or 3D printed parts feature transversely isotropic elasticity. Although its influence on pressures, shapes, and sizes has been studied extensively for dry contacts, the transferability to lubricated contacts is fragmented. This numerical study investigates how the content and orientation of short fibers in fiber-reinforced polymers (FRP) affect elastohydrodynamic lubrication (EHL) of point contacts. Material properties are modeled with Tandon-Weng homogenization. For EHL modeling, a fully-coupled approach based on finite element discretization is used. Results on hydrodynamic pressure and film thickness as well as material stress distribution are analyzed and compared to common approximations using the effective contact moduli. It is shown that the combination of fiber content and orientation defines the effective contact stiffness that determines the contact shape, size, and film thickness. Furthermore, the contact regime can change if a contact-specific stiffness threshold is reached.https://www.mdpi.com/2073-4360/14/17/3507short fiber reinforcementpolyamide (PA66)transversely isotropic elasticityelastohydrodynamic lubrication (EHL)finite element method (FEM) |
| spellingShingle | Enzo Maier Moritz Lengmüller Thomas Lohner Effect of Transversely Isotropic Elasticity on Elastohydrodynamic Lubrication of Point Contacts Polymers short fiber reinforcement polyamide (PA66) transversely isotropic elasticity elastohydrodynamic lubrication (EHL) finite element method (FEM) |
| title | Effect of Transversely Isotropic Elasticity on Elastohydrodynamic Lubrication of Point Contacts |
| title_full | Effect of Transversely Isotropic Elasticity on Elastohydrodynamic Lubrication of Point Contacts |
| title_fullStr | Effect of Transversely Isotropic Elasticity on Elastohydrodynamic Lubrication of Point Contacts |
| title_full_unstemmed | Effect of Transversely Isotropic Elasticity on Elastohydrodynamic Lubrication of Point Contacts |
| title_short | Effect of Transversely Isotropic Elasticity on Elastohydrodynamic Lubrication of Point Contacts |
| title_sort | effect of transversely isotropic elasticity on elastohydrodynamic lubrication of point contacts |
| topic | short fiber reinforcement polyamide (PA66) transversely isotropic elasticity elastohydrodynamic lubrication (EHL) finite element method (FEM) |
| url | https://www.mdpi.com/2073-4360/14/17/3507 |
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