Experimental investigation and constitutive modelling of the deformation behaviour of high impact polystyrene for plug-assisted thermoformingOualid Atmani, Fazilay Abbès, Yuming Li, Serge Batkam and Boussad AbbèsMechanics & Industry, 21 6 (2020) 607DOI: https://doi.org/10.1051/meca/2020084