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Characterization of Thermo-Mechanical and Fracture Behaviors of Thermoplastic Polymers
Laboratory of Mechanics and Materials of the Civil Engineering (L2MGC-EA4114), University of Cergy Pontoise, 5 mail Gay-Lussac, Neuville sur Oise, Cergy Pontoise Cedex 95031, France
Department of Mechanics Management and Mathematics (DMMM), Politecnico di Bari, Viale Japigia, 182, Bari 70126, Italy
Electromechanical Systems Laboratory (LASEM-LR99ES36), National Engineering School of Sfax, University of Sfax, Cité El Habib BP29, Sfax 3052, Tunisia
* Author to whom correspondence should be addressed.
Received: 28 October 2013; in revised form: 14 December 2013 / Accepted: 16 December 2013 / Published: 13 January 2014
Abstract: In this paper the effects of the strain rate on the inelastic behavior and the self-heating under load conditions are presented for polymeric materials, such as polymethyl methacrylate (PMMA), polycarbonate (PC), and polyamide (PA66). By a torsion test, it was established that the shear yield stress behavior of PMMA, PC, and PA66 is well-described by the Ree-Eyring theory in the range of the considered strain rates. During the investigation, the surface temperature was monitored using an infrared camera. The heat release appeared at the early stage of the deformation and increased with the strain and strain rate. This suggested that the external work of deformation was dissipated into heat so the torsion tests could not be considered isothermal. Eventually, the effect of the strain rate on the failure modes was analyzed by scanning electron microscopy.
Keywords: polymeric materials; torsion test; infrared camera; self-heating; thermo-mechanical behavior
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MDPI and ACS Style
Ghorbel, E.; Hadriche, I.; Casalino, G.; Masmoudi, N. Characterization of Thermo-Mechanical and Fracture Behaviors of Thermoplastic Polymers. Materials 2014, 7, 375-398.
Ghorbel E, Hadriche I, Casalino G, Masmoudi N. Characterization of Thermo-Mechanical and Fracture Behaviors of Thermoplastic Polymers. Materials. 2014; 7(1):375-398.
Ghorbel, Elhem; Hadriche, Ismail; Casalino, Giuseppe; Masmoudi, Neila. 2014. "Characterization of Thermo-Mechanical and Fracture Behaviors of Thermoplastic Polymers." Materials 7, no. 1: 375-398.