Finte element modeling of the behavior of polymethyl-methacrylate (PMMA) during high pressure torsion process.

Frattura ed Integrità Strutturale

Abderrahim Talha¹  Benaoumeur Aour²  Noureddine Benseddiq³  Ahmed Drai⁴  Naima Belayachi⁵ 

[1] Ecole des Hautes Etudes d’Ingénieur (HEI), 13 rue de Toul, 59046 Lille, Lille Mechanics Unit, University of Lille, France;Laboratory of Applied Biomechanics And Biomaterials (LABAB), ENP Oran, BP1523 El Mnaour, Oran, 31000, Algeria.;Lille Mechanics Unit, University of Lille, France;Mechanical Engineering department, Mustapha STAMBOULI University of Mascara, 29000, Mascara, Algeria.;Université d’Orléans, Laboratoire de Mécanique Gabriel Lamé Polytech Orléans, 45072 Orléans, France.;

关键词: HPT;    Finite Elements;    PMMA;    Behavior;    Plastic strain;   

DOI  :  

来源: DOAJ

【 摘 要 】

High Pressure Torsion (HPT) is a highly effective super-plastic deformation process for obtaining nano-materials with high performance mechanical properties. In view of its optimization, it is of paramount importance to evaluate the relations between the behavior of the material under the effects of different processing parameters. In this context, this work aims to highlight the plastic strain distribution in the deformed material as a function of the hydrostatic pressure, the torsion angle and the temperature of the material applied during the process. A typical amorphous polymer (Polymethyl-Methacrylate: PMMA) has been tested. Firstly, in order to identify the material parameters of a phenomenological elasto-viscoplastic model compression tests at different temperatures and strain rates have been carried out. Then, the distributions of the effective plastic strain, the equivalent plastic strain rate and the hydrostatic stress were analyzed using finite elements method. Recommendations on process conditions were proclaimed at the end of this work according to the obtained numerical results.

【 授权许可】

Unknown