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Material Identification
The finite element model updating method that is implemented
in FEMtools can be used for identifying the elastic properties
of isotropic, orthotropic and anisotropic materials.
If the material properties or beam section properties
are selected as global updating parameters, and the modes
of vibration of a test specimen (obtained by measurement)
are used as reference responses, then the updating procedure
will iteratively adjust starting values until predicted
dynamic behavior corresponds with observed one.
This approach is a non-destructive material testing method
that is especially useful for composites and laminated materials.
The method easily adapts to be used in temperature-controlled
environments to obtain properties as function of temperature
(or other controlled conditions).
Applications of this methodology can be found in the
following recent theses:
Tom Lauwagie, Vibration-Based Methods
for the Identification of the Elastic Properties of Layered
Materials, Doctoral thesis, University of Leuven, October
2005.
Download (PDF, 8.0 MB)
Erik Euler, Identification of the Material Properties
of Slender Composite Structures, MSc thesis, University
of Brussels, 2004.
Download (PDF, 2.7 MB)
References Related to
Material Identification
E. Euler, H. Sol, E. Dascotte, Identification of Material
Properties of Composite Beams: Inverse Method Approach,
Presented at the 2006 SEM Annual Conference & Exposition
on Experimental and Applied Mechanics, June 4-7, 2006, St.
Louis, MO, USA.
Download (PDF, 360 KB)
T. Lauwagie, H. Sol, W. Heylen, Handling Uncertainties
in Mixed Numerical-Experimental Techniques for Vibration
Based Material Identification. Journal of Sound and
Vibration, Volume 291, Issues 3-5, 4 April 2006, Pages 723-739.
Lauwagie T., Heylen W., Sol H., Van der Biest O., Roebben
G., The Uncertainty Budget of Mixed-Numerical-Experimental-Techniques
for the Identification of Elastic Material Properties from
Resonant Frequencies. Proceedings of the International
Seminar on Modal Analysis 2004 (ISMA), pp. 1313-1324.
Download (PDF, 349 KB)
Lauwagie T., Heylen W., Sol H., Van der Biest O.,
Validation of a Vibration Based Identification Procedure
for Layered Materials. Proceedings of the International
Seminar on Modal Analysis 2004 (ISMA), pp. 1325-1336.
Download (PDF, 695 KB)
T. Lauwagie, H. Sol, W. Heylen, G. Roebben, Determination
of the In-Plane Elastic Properties of the Different Layers
of Laminated Plates by Means of Vibration Testing and Model
Updating. Journal of Sound and Vibration, Volume 274,
Issues 3-5, 22 July 2004, Pages 529-546.
W.-C. Wang, K.-H. Lai, Hybrid Determination
of Equivalent Characteristics of Perforated Plates.
Experimental Mechanics, Vol. 43, No. 2, 163-172 (2003)
T. Lauwagie, H. Sol, G. Roebben, W. Heylen, Y. Shi, O.
Van der Biest, Mixed Numerical-Experimental Identification
of Elastic Properties of Orthotropic Metal Plates. NDT
& E International, Volume 36, Issue 7, October 2003, Pages
487-495.
T. Lauwagie, E. Dascotte, Layered
Material Identification using Multi-Model Updating.
Proceedings of the 3rd International Conference on Structural
Dynamics Modeling - Test, Analysis, Correlation and Validation
- Madeira Island, Portugal, June 2002.
Download (PDF, 160 KB)
Lauwagie T., Sol H., Roebben G., Heylen W., Shi Y.,
Validation of the Resonalyser Method: An Inverse Method
for Material Identification. Proceedings of the
International Seminar on Modal Analysis 2002 (ISMA), pp.
687-694.
Download (PDF, 296 KB)
Lauwagie T., Sol H., Dascotte E., Damage Identification
in Beams using Inverse Methods. Proceedings of the
International Seminar on Modal Analysis 2002 (ISMA), pp.
715-722.
Download (PDF, 145 KB)
Sol H., Lauwagie T., Guillaume P., Identification
of Distributed Material Properties using Measured Modal
Data, Proceedings of the International Seminar
on Modal Analysis 2002 (ISMA), pp. 695-704.
Download (PDF, 213 KB)
H. Hua, H. Sol, Finite Element Model Updating of a
Short Fiber Reinforced Composite Material Structure.
International Conference on Structural Dynamics Modeling,
NAFEMS/DTA, July 1993, Cranfield, UK.
For more information on the topics and cases that
are presented, contact
info@femtools.com.
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Material
Identification