Simulation of extrusion of high density polyethylene tubesAntonios Koutelieris, Kyriaki Kioupi, Onoufrios Haralampous, Konstantinos Kitsakis, Nikolaos Vaxevanidis and John KechagiasMATEC Web Conf., 112 (2017) 04004DOI: https://doi.org/10.1051/matecconf/201711204004