Comparison of validation methods for forming simulations

Alexander Schug, Gabriel Kapphan, Georg Bardl, Roland Hinterhölzl, Klaus Drechsler

Research output: Chapter in Book/Report/Conference proceedingsConference contributionpeer-review

Abstract

The forming simulation of fibre reinforced thermoplastics could reduce the development time and improve the forming results. But to take advantage of the full potential of the simulations it has to be ensured that the predictions for material behaviour are correct. For that reason, a thorough validation of the material model has to be conducted after characterising the material. Relevant aspects for the validation of the simulation are for example the outer contour, the occurrence of defects and the fibre paths. To measure these features various methods are available. Most relevant and also most difficult to measure are the emerging fibre orientations. For that reason, the focus of this study was on measuring this feature. The aim was to give an overview of the properties of different measuring systems and select the most promising systems for a comparison survey. Selected were an optical, an eddy current and a computer-assisted tomography system with the focus on measuring the fibre orientations. Different formed 3D parts made of unidirectional glass fibre and carbon fibre reinforced thermoplastics were measured. Advantages and disadvantages of the tested systems were revealed. Optical measurement systems are easy to use, but are limited to the surface plies. With an eddy current system also lower plies can be measured, but it is only suitable for carbon fibres. Using a computer-assisted tomography system all plies can be measured, but the system is limited to small parts and challenging to evaluate.

Original languageEnglish
Title of host publicationProceedings of the 21st International ESAFORM Conference on Material Forming, ESAFORM 2018
EditorsGianluca Buffa, Livan Fratini, Giuseppe Ingarao, Rosa Di Lorenzo
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735416635
DOIs
Publication statusPublished - 2 May 2018
Event21st International ESAFORM Conference on Material Forming, ESAFORM 2018 - Palermo, Italy
Duration: 23 Apr 201825 Apr 2018

Publication series

NameAIP Conference Proceedings
Volume1960
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference21st International ESAFORM Conference on Material Forming, ESAFORM 2018
CountryItaly
CityPalermo
Period23.04.201825.04.2018

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