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Identification of hyper‐ and viscoelastic properties of different flexible FDM printed specimens
Author(s) -
Reppel Thomas,
Weinberg Kerstin
Publication year - 2018
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201800382
Subject(s) - viscoelasticity , materials science , thermoplastic polyurethane , composite material , fused deposition modeling , copolyester , hyperelastic material , thermoplastic , ultimate tensile strength , elastomer , 3d printing , structural engineering , finite element method , polyester , engineering
Additive manufacturing, also known as 3D printing, has become a well‐established method in many different fields of fabrication. It is a preferred method to produce small series or even individual parts of components. The present work aims at the experimental identification of the hyper‐ and viscoelastic properties of two different kinds of highly flexible filaments for fused deposition modeling. A thermoplastic polyurethane TPU and a thermoplastic copolyester elastomer TPC. To this end, several uniaxial tensile tests, as well as relaxation experiments of printed specimens are performed. From the measured data we identify the parameters of different hyperelastic models. For the viscoelastic part we find the parameters of a Prony‐series with N elements of a generalized Maxwell‐model. We also consider a model based on generalized fractional elements [1,3,4].