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Identification of bending rigidities of Thin Composite Plates using the piecewise Virtual Fields method with noise minimization effect.
Author(s):
1. Syed Muhammad Kashif: Pakistan Space & Upper Atmosphere Research Commission (SUPARCO), Karachi, Pakistan
2. Evelyne Toussaint: Laboratoire de Mecanique et Ingenieries, Universite Blaise Pascal Clermont II, Institut Francais de Mecanique Avancee 24, Avenue des Landais BP 206 - 63174 Aubiere Cedex, France
3. Michel Grediac: Laboratoire de Mecanique et Ingenieries, Universite Blaise Pascal Clermont II, Institut Francais de Mecanique Avancee 24, Avenue des Landais BP 206 - 63174 Aubiere Cedex, France
Abstract:
This paper presents recent improvements made in virtual fields method used for identification of bending rigidities of a thin anisotropic composite plate. The idea is to determine the unknown parameters from a single test giving a unique heterogeneous strain field. Two aspects are developed and presented here. First is the use of piecewise virtual fields where an initial single virtual strain field defined over the specimen`s whole surface is decomposed into several pieces. Second is the effect of noise minimization onto the identification procedure such that an optimized virtual strain field is automatically selected which is least sensitive to the noisy data. The paper also discusses the effect of advancements in terms of robustness and accuracy when noisy data is processed. Finally, using the developed procedure, an optimized testing configuration is explored in terms of optimal load location.
Page(s): 158-165
DOI: DOI not available
Published: Journal: Proceedings 6th International Bhurban Conference on Applied Sciences and Technology , Volume: 1, Issue: 0, Year: 2009
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