Temperature dependent two-body abrasive wear of polycarbonate surfaces
| Autor: | Patrick D. Anderson, Lambèrt C.A. van Breemen, Stan F.S.P. Looijmans, Tarek Kershah |
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| Přispěvatelé: | Processing and Performance |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Constitutive equation 02 engineering and technology 0203 mechanical engineering Materials Chemistry Single-asperity sliding friction Hydrostatic stress Polycarbonate Composite material chemistry.chemical_classification Drop (liquid) Abrasive Temperature Surfaces and Interfaces Polymer 021001 nanoscience & nanotechnology Condensed Matter Physics Finite element method Surfaces Coatings and Films Finite element modelling Contact mechanics 020303 mechanical engineering & transports chemistry Mechanics of Materials visual_art visual_art.visual_art_medium 0210 nano-technology human activities |
| Zdroj: | Wear, 440-441:203089. Elsevier |
| ISSN: | 0043-1648 |
| Popis: | During the lifetime of polycarbonate surfaces, which for example are used as helmets or protective eye visors, friction and abrasive wear may result from scratching or sliding cycles. Previous research showed that it is essential to understand the intrinsic mechanical response of the polymer in order to further investigate its frictional and wear response. The Eindhoven Glassy Polymer (EGP) model is a 3D elasto-viscoplastic constitutive model, developed to describe the intrinsic mechanical response of polymer glasses. Temperature is a crucial player in the intrinsic response and also plays a pivotal role in the resulting frictional response as tested via a single-asperity scratch test. In the current study, a finite element model is used to investigate the effect of temperature on the frictional response of polycarbonate and detect the onset of crack formation and wear initiation. The results show that temperature has a strong effect on the intrinsic response of the polymer, i.e. drop in yield stress and altered strain-hardening and strain-softening response. However, it has a minute effect on its frictional response, the simulation model is able to capture this response quantitively. In addition, cracks are observed experimentally at elevated temperature. A critical positive hydrostatic stress value is selected as a criterion for crack formation. It has been shown that at elevated temperatures the value of the maximum positive hydrostatic stress increases due to the altered intrinsic response of the material on one hand, and the increased adhesion between the tip and the polymer on the other hand. |
| Databáze: | OpenAIRE |
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