Viscoelastic-Viscoplastic Modelling of the Scratch Response of PMMA - Ecole Nationale des Travaux Publics de l'Etat Accéder directement au contenu
Article Dans Une Revue Advances in Materials Science and Engineering Année : 2013

Viscoelastic-Viscoplastic Modelling of the Scratch Response of PMMA

Résumé

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.
Fichier principal
Vignette du fichier
289698.pdf (363.49 Ko) Télécharger le fichier
Origine : Publication financée par une institution

Dates et versions

emse-00942952 , version 1 (10-12-2019)

Identifiants

Citer

Guillaume Kermouche, Nicolas Aleksy, Jean-Michel Bergheau. Viscoelastic-Viscoplastic Modelling of the Scratch Response of PMMA. Advances in Materials Science and Engineering, 2013, 2013, pp.article ID289698. ⟨10.1155/2013/289698⟩. ⟨emse-00942952⟩
124 Consultations
103 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More