Coupled Thermo Mechanical Characterisation of Polymers Based on Inverse Analyses and IR Measurements

Abstract:

Heat dissipation during mechanical testing can disturb experimental characterisation of polymers. In this work it is demonstrated that these effects are not limited to extreme loading conditions such as impacts. A visco-hyperelastic, visco-plastic constitutive model is proposed that accounts for thermo mechanical coupling in a fully 3D thermodynamics approach. Strain-rate and temperature dependencies are coupled using a concept close to the well known time-temperature superposition principle. Constitutive and coupling parameters are identified at the same time using an inverse analysis protocol. An experimental data base is generated for mechanical measurements at different temperatures and strain rates but also for temperatures during tests measured using IR technology. Such a protocol allows investigation on the strain-rate sensitivity in a much more relevant manner than classical one and the value of the so-called Taylor-Quinney coupling parameter is discussed.

• Periodical: Applied Mechanics and Materials (Volume 70)
• Pages: 393-398
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.70.393
• Online since: August 2011
• Authors: Aurelien Maurel-Pantel, E. Baquet, Jerome Bikard, Noelle Billon
• Keywords: Digital Image Correlation (DIC), Ir Measurement, Semi Crystalline Polymers, Thermo Mechanical Characterization

References

[1] N. Temimi and N. Billon: Applied Mechanics and Materials Vols. 3-4 (2005), p.363.

[2] N. Temimi-Maaref, A. Burr and N. Billon: Polymer Science, Series A Vol. 50-5 (2008), p.558.

[3] A. Andriyana, L. Silva and N. Billon: Applied Mechanics and Materials; Advances in Experimental Mechanics Vols. 24-25 (2010), p.419.

[4] A. Andriyana, N. Billon and L. Silva: European Journal of Mechanics A/Solids Vol. 29 (2010), p.1065.

[5] D. Lai, I. Yakimets and M. Guignon: Material Science and Engineering A Vol. 405 (2005), p.266.

[6] E. Roguet, Caractérisation expérimentale et modélisation de l'état relaxé dans le polyamide 11 à hautes temperatures, PhD thesis, ENSMA Poitiers (2006).

[7] A. Drozdov and J. Christiansen: Comput. Mat. Sci. Vol. 39 (2007), p.729.

[8] S. Meo, A. Boukamel, and O. Debordes: Computer and Structure Vol. 80 (2002), p. (2085).

[9] N. Billon submitted for publication in J. Appl. Polym. Sci (2010).

[10] S.F. Edwards and T. Vilgis: Polymer Vol. 27 (1986), p.483.

[11] E. Baquet, PhD thesis, Mines-ParisTech to be defended (2011).