INFLUENCING THE INDENTATION CURVES BY THE BLUNTNESS OF THE BERKOVICH INDENTER AT THE FEM MODELLING
The influence of the Berkovich indenter bluntness on the indentation curves at nanoindentation test of fused silica is determined by the FEM (finite element method) in this paper. The Berkovich indenter, which is mostly used for the nanoindentation test, was assumed for calculations. The indenter is...
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Czech Technical University in Prague
2020-06-01
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| Series: | Acta Polytechnica CTU Proceedings |
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| Online Access: | https://ojs.cvut.cz/ojs/index.php/APP/article/view/6706 |
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| author | Jaroslav Kovář Vladimír Fuis Jan Tomáštík |
| author_facet | Jaroslav Kovář Vladimír Fuis Jan Tomáštík |
| author_sort | Jaroslav Kovář |
| collection | DOAJ |
| description | The influence of the Berkovich indenter bluntness on the indentation curves at nanoindentation test of fused silica is determined by the FEM (finite element method) in this paper. The Berkovich indenter, which is mostly used for the nanoindentation test, was assumed for calculations. The indenter is always blunted in real tests. The bluntness of the indenter has an influence on the results of the nanoindentation test. The combination of the nanoindentation test and the FE modelling can be used for the calculation of the parameters of fused silica plasticity and estimation of the bluntness of the indenter. In this paper, the FEM was used for calculating of the indentation curves. Two cases of bluntness were assumed. The curves for ideally sharp or blunted indenter were determined. The results of these calculations showed that the indentation curves are dependent on the bluntness of the Berkovich indenter. The greatest relative influence of the nanoindentation curves by the bluntness is in the area of small values of the indenter displacement. The impact of assuming blunted indenter to calculated parameters of plasticity was assessed. It is often difficult to measure the bluntness of the indenter but it has an influence on the results of the nanoindentation test and should be included into calculations to make it more precise. |
| format | Article |
| id | doaj-art-ab98b9c19b3a49beb0052481fc014416 |
| institution | Kabale University |
| issn | 2336-5382 |
| language | English |
| publishDate | 2020-06-01 |
| publisher | Czech Technical University in Prague |
| record_format | Article |
| series | Acta Polytechnica CTU Proceedings |
| spelling | doaj-art-ab98b9c19b3a49beb0052481fc0144162025-08-20T03:57:04ZengCzech Technical University in PragueActa Polytechnica CTU Proceedings2336-53822020-06-0127013113510.14311/APP.2020.27.01315236INFLUENCING THE INDENTATION CURVES BY THE BLUNTNESS OF THE BERKOVICH INDENTER AT THE FEM MODELLINGJaroslav Kovář0Vladimír Fuis1Jan Tomáštík2Brno University of Technology, Institute of Solid Mechanics, Mechatronics and Biomechanics, Technická 2896/2, 616 69 Brno, Czech RepublicBrno University of Technology, Institute of Solid Mechanics, Mechatronics and Biomechanics, Technická 2896/2, 616 69 Brno, Czech Republic Czech Academy of Sciences, Centre of Mechatronics, Institute of Thermomechanics, Technická 2896/2, 616 69 Brno, Czech RepublicCzech Academy of Sciences, Institute of Physics, Joint Laboratory of Optics of Palacky University Olomouc and Institute of Physics of the AS, Na Slovance 1999/2, 182 00 Praha 8, Czech RepublicThe influence of the Berkovich indenter bluntness on the indentation curves at nanoindentation test of fused silica is determined by the FEM (finite element method) in this paper. The Berkovich indenter, which is mostly used for the nanoindentation test, was assumed for calculations. The indenter is always blunted in real tests. The bluntness of the indenter has an influence on the results of the nanoindentation test. The combination of the nanoindentation test and the FE modelling can be used for the calculation of the parameters of fused silica plasticity and estimation of the bluntness of the indenter. In this paper, the FEM was used for calculating of the indentation curves. Two cases of bluntness were assumed. The curves for ideally sharp or blunted indenter were determined. The results of these calculations showed that the indentation curves are dependent on the bluntness of the Berkovich indenter. The greatest relative influence of the nanoindentation curves by the bluntness is in the area of small values of the indenter displacement. The impact of assuming blunted indenter to calculated parameters of plasticity was assessed. It is often difficult to measure the bluntness of the indenter but it has an influence on the results of the nanoindentation test and should be included into calculations to make it more precise.https://ojs.cvut.cz/ojs/index.php/APP/article/view/6706berkovich indenter, bluntness, finite element method, nanoindentation |
| spellingShingle | Jaroslav Kovář Vladimír Fuis Jan Tomáštík INFLUENCING THE INDENTATION CURVES BY THE BLUNTNESS OF THE BERKOVICH INDENTER AT THE FEM MODELLING Acta Polytechnica CTU Proceedings berkovich indenter, bluntness, finite element method, nanoindentation |
| title | INFLUENCING THE INDENTATION CURVES BY THE BLUNTNESS OF THE BERKOVICH INDENTER AT THE FEM MODELLING |
| title_full | INFLUENCING THE INDENTATION CURVES BY THE BLUNTNESS OF THE BERKOVICH INDENTER AT THE FEM MODELLING |
| title_fullStr | INFLUENCING THE INDENTATION CURVES BY THE BLUNTNESS OF THE BERKOVICH INDENTER AT THE FEM MODELLING |
| title_full_unstemmed | INFLUENCING THE INDENTATION CURVES BY THE BLUNTNESS OF THE BERKOVICH INDENTER AT THE FEM MODELLING |
| title_short | INFLUENCING THE INDENTATION CURVES BY THE BLUNTNESS OF THE BERKOVICH INDENTER AT THE FEM MODELLING |
| title_sort | influencing the indentation curves by the bluntness of the berkovich indenter at the fem modelling |
| topic | berkovich indenter, bluntness, finite element method, nanoindentation |
| url | https://ojs.cvut.cz/ojs/index.php/APP/article/view/6706 |
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