Premium
Experimental and Numerical Study of Polypropylene/Polyethylene Thin Foil in Biaxial Tension
Author(s) -
Sguazzo Carmen,
Betz Sebastian,
Hartmann Stefan
Publication year - 2016
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201610186
Subject(s) - polypropylene , materials science , composite material , digital image correlation , foil method , polyethylene , thermoplastic , copolymer , stress–strain curve , finite element method , composite number , tension (geology) , stress (linguistics) , polymer , structural engineering , ultimate tensile strength , deformation (meteorology) , linguistics , philosophy , engineering
The material under consideration is a thermoplastic copolymer blend of polypropylene and polyethylene (PP/PE), constituting the core layer of a steel/polymer/steel composite material. A biaxial loading machine was developed for studying the behavior of the copolymer subjected to in‐plane complex stress states. A study on the shape of the specimen by means of numerical finite element simulations and preliminary experimental tests are carried out, in order to obtain a maximization of the strain distribution in the middle region of the cruciform specimen. Afterwards, the sensitivity of the mechanical response under both equibiaxial and non‐equibiaxial conditions is addressed. All the experiments are monitored by means of a digital image correlation (DIC) system, providing full‐field measurements of the displacements, and, consequently, of the strain distribution. The presented experimental results will be used for validating the material model developed for the PP/PE layer material. (© 2016 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)