A Comparison Between Static And Dynamic
Inverse Modelling For The Identification Of
Orthotropic Elastic Material Parameters
Author(s)
D. Lecompte, T. Lauwagie, H. Sol, W. Heylen & J. Vantomme
Abstract
This paper compares two different Mixed Numerical-Experimental Techniques
(MNET) to determine the in-plane elastic properties of sheet materials. The first
technique (the static method) is based on the inverse analysis of statically loaded
perforated specimens. The applied load is measured with a load cell, while
Electronic Speckle pattern interferometry is used for the measurement of the
entire displacement field. Strains are calculated based on the gradient of the
measured displacement field. The second technique (the dynamic method) is a
vibration-based MNET. This technique requires the fundamental flexural and
torsional frequencies of a set of rectangular beam-shaped specimens as
experimental data. The resonant frequencies are obtained by exciting the test
samples acoustically and capturing the vibration response with a laser Doppler
vibrometer. In the numerical phase of both techniques, the orthotropic material
parameters are identified by simultaneously updating the elastic properties of the
finite element models of the test specimens. The updating process is driven by
the least-squares minimisation of the differences between the measured and the
calculated strains for the first technique and resonant frequencies for the second
technique.
Keywords: inverse modelling, parameter identification, elastic behaviour, sheet
materials.
Keywords
inverse modelling, parameter identification, elastic behaviour, sheet
materials.
Related Book
Other papers in this volume
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