A Constitutive Material Model Applied to Microforming Processes
| Autor: | Z. Zimniak |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0209 industrial biotechnology
Materials science Flow (psychology) Constitutive equation microforming constitutive model 02 engineering and technology lcsh:Technology Article 020901 industrial engineering & automation size effect General Materials Science lcsh:Microscopy Scaling Microscale chemistry lcsh:QC120-168.85 FEM lcsh:QH201-278.5 lcsh:T Mechanics 021001 nanoscience & nanotechnology Grain size Finite element method lcsh:TA1-2040 Sample size determination lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology lcsh:TK1-9971 Realization (systems) |
| Zdroj: | Materials Volume 13 Issue 22 Materials, Vol 13, Iss 5143, p 5143 (2020) |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma13225143 |
| Popis: | The plastic treatment of products reduced to sizes corresponding to the microscale poses difficulties, due to the occurrence of the so-called size effect, which is responsible for the different behavior of the material during the realization of microforming. In this study, a constitutive equation was elaborated taking into account two types of size effects, with the use of a surface model as well as a composite material model. The influence of the size effect referring to both the material grain size and the geometric scaling of the sample size on the material&rsquo s flow stresses was considered. The surface model took into account the different grain shapes present in actual polycrystalline materials. After the application of the presented model for titanium Grade 2, a good agreement of the experimental results with the FEM simulation results was obtained. Thus, the proper FEM modeling of microforming processes should be conducted with the use of a material model, taking into account the occurring size effects. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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