Thermomechanical properties of polycarbonate under dynamic loading

V. Lerch (1) , G. Gary (2) , P. Hervé (1)

1 LEEE - Laboratoire d'énergétique et d'économie d'énergie
2 LMS - Laboratoire de mécanique des solides

In the present study, dynamic compression tests have been performed on polycarbonate (PC) specimen for strain rates in the range of 500 to 2000s -1 and on aluminum for a strain rate around 1300s -1 using a Split Hopkinson Pressure Bar (SHPB). Temperature measurement has been carried out using a fast response infrared optical pyrometer which is able to measure the surface temperature rise of a specimen during the tests. The temperature data shows that the mechanical work is not completely converted into heat. It implies the existence of a stored energy within the material and possibly a subsequent delay for the conversion of mechanical work into heat.

Domaines: Mécanique [physics.med-ph]

V. Lerch, G. Gary, P. Hervé. Thermomechanical properties of polycarbonate under dynamic loading. Journal de Physique IV Proceedings, 2003, 110, pp.159-164. ⟨10.1051/jp4:20020687⟩. ⟨hal-00111383⟩