Viscoelastic-Viscoplastic Modelling of the Scratch Response of PMMA
This paper aims at understanding how to model the time-dependent behavior of PMMA during a scratch loading at a constant speed and at middle strain levels. A brief experimental study is first presented, consisting of the analysis of microscratches carried out at various scratching velocities and nor...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2013/289698 |
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| author | G. Kermouche N. Aleksy J. M. Bergheau |
| author_facet | G. Kermouche N. Aleksy J. M. Bergheau |
| author_sort | G. Kermouche |
| collection | DOAJ |
| description | This paper aims at understanding how to model the time-dependent behavior of PMMA during a scratch loading at a constant speed and at middle strain levels. A brief experimental study is first presented, consisting of the analysis of microscratches carried out at various scratching velocities and normal loads. The loading conditions have been chosen in such a way that neither (visco)elasticity nor (visco)plasticity of the PMMA may be neglected a priori. The main analyzed parameter is the tip penetration depth measured during the steady state. Then, a finite element model is used to investigate the potential of classical elastic-viscoplastic constitutive models to reproduce these experimental results. It is mainly shown that these models lead to unsatisfying results. More specifically, it is pointed out here that the time-independent Young modulus used in such models is not suitable. To take into account this feature, a viscoelastic-viscoplastic model based on the connection in series of a viscoelastic part with a viscoplastic part is proposed. It is shown that it leads to more acceptable results, which points out the importance of viscoelasticity in the scratch behavior of solid polymers. |
| format | Article |
| id | doaj-art-41164004cf0a4df3a33776427032aa72 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-41164004cf0a4df3a33776427032aa722025-02-03T01:28:05ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422013-01-01201310.1155/2013/289698289698Viscoelastic-Viscoplastic Modelling of the Scratch Response of PMMAG. Kermouche0N. Aleksy1J. M. Bergheau2Ecole Nationale Supérieure des Mines de Saint-Etienne, SMS Division, LGF UMR CNRS 5307, 158 Cours Fauriel 42023 Saint-Etienne Cedex, FranceUniversité de Lyon, ENISE, LTDS UMR CNRS 5513, 58 Rue Jean Parot, 42023 Saint-Etienne Cedex 2, FranceUniversité de Lyon, ENISE, LTDS UMR CNRS 5513, 58 Rue Jean Parot, 42023 Saint-Etienne Cedex 2, FranceThis paper aims at understanding how to model the time-dependent behavior of PMMA during a scratch loading at a constant speed and at middle strain levels. A brief experimental study is first presented, consisting of the analysis of microscratches carried out at various scratching velocities and normal loads. The loading conditions have been chosen in such a way that neither (visco)elasticity nor (visco)plasticity of the PMMA may be neglected a priori. The main analyzed parameter is the tip penetration depth measured during the steady state. Then, a finite element model is used to investigate the potential of classical elastic-viscoplastic constitutive models to reproduce these experimental results. It is mainly shown that these models lead to unsatisfying results. More specifically, it is pointed out here that the time-independent Young modulus used in such models is not suitable. To take into account this feature, a viscoelastic-viscoplastic model based on the connection in series of a viscoelastic part with a viscoplastic part is proposed. It is shown that it leads to more acceptable results, which points out the importance of viscoelasticity in the scratch behavior of solid polymers.http://dx.doi.org/10.1155/2013/289698 |
| spellingShingle | G. Kermouche N. Aleksy J. M. Bergheau Viscoelastic-Viscoplastic Modelling of the Scratch Response of PMMA Advances in Materials Science and Engineering |
| title | Viscoelastic-Viscoplastic Modelling of the Scratch Response of PMMA |
| title_full | Viscoelastic-Viscoplastic Modelling of the Scratch Response of PMMA |
| title_fullStr | Viscoelastic-Viscoplastic Modelling of the Scratch Response of PMMA |
| title_full_unstemmed | Viscoelastic-Viscoplastic Modelling of the Scratch Response of PMMA |
| title_short | Viscoelastic-Viscoplastic Modelling of the Scratch Response of PMMA |
| title_sort | viscoelastic viscoplastic modelling of the scratch response of pmma |
| url | http://dx.doi.org/10.1155/2013/289698 |
| work_keys_str_mv | AT gkermouche viscoelasticviscoplasticmodellingofthescratchresponseofpmma AT naleksy viscoelasticviscoplasticmodellingofthescratchresponseofpmma AT jmbergheau viscoelasticviscoplasticmodellingofthescratchresponseofpmma |