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Publication type: Article in scientific journal
Type of review: Peer review (publication)
Title: Validation of advanced constitutive models for accurate FE modeling of TPU
Authors: Eberlein, Robert
Pasieka, Lucian
Rizos, Dimosthenis
et. al: No
DOI: 10.5185/amlett.2019.0031
Published in: Advanced Materials Letters
Volume(Issue): 10
Issue: 12
Pages: 893
Pages to: 898
Issue Date: Dec-2019
Publisher / Ed. Institution: VBRI Press
ISSN: 0976-3961
Language: English
Subjects: TPU; System Validation; Material Calibration; FE Simulation
Subject (DDC): 620.11: Engineering materials
Abstract: Thermoplastic polyurethanes (TPU) have become preferred materials for demanding high strain rate applications in many industries throughout past years. Due to their comparatively high abrasion resistance and toughness, TPU materials form an excellent fit for critical components sustaining high pressures in combination with harsh ambient conditions. This presentation illustrates a comparatively new field of critical applications for TPU components. While the operational pressures remain rather moderate at maximum 50 bar, challenges arise from high-frequency, cyclic loading conditions. In order to design robust dynamic TPU components, two main tasks must be accomplished: (i) visco-elastic-plastic material modeling and parameter identification, and (ii) material validation under realistic dynamic loading conditions on system level by means of advanced finite element (FE) simulations. This article puts (i) emphasis on the material calibration process and (ii) specifically demonstrates material validation on system level for selected TPU materials. In this context strain rate dependency of various TPU grades is discussed, which illustrates deficiencies of classical material modeling techniques available in commercial finite element software versus advanced nonlinear models. Eventually, recommendations are provided for an efficient but also accurate material calibration process of solid TPU materials that can significantly enhance product innovation processes.
Fulltext version: Published version
License (according to publishing contract): Licence according to publishing contract
Departement: School of Engineering
Organisational Unit: Institute of Mechanical Systems (IMES)
Appears in collections:Publikationen School of Engineering

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