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Identification of the four orthotropic plate stiffnesses using a single open-hole tensile test

Abstract : Identification of in-plane orthotropic elastic properties of composite materials usually requires various specimens and tests, such as tensile tests performed in different directions. However, since more 15 years optical full-field measurement methods supply a huge amount of data from one single test and make it possible to identify properties from quite a limited number of specimens and tests. In particular, interesting studies have been carried out to design new specific testing approach introducing controlled heterogeneity to activate every stiffness components [1]. However, the idea to use a classical test, well-known and performed by the mechanical community, remains quite attractive. The open hole specimen, widely used under various mechanical solicitations, appears as a good candidate. Moreover the feasibility to identify orthotropic parameters of one specimen under tension has been shown [2]. The link between the experimental data and the numerical identification process is still complicated and a particular study, focusing on the utilization of the metrological content of experimental data, is necessary. The present contribution introduces a model which includes both optical and signal processing considerations. A complete study proving the 'identifiability' of the orthotropic elastic properties results in the evaluation of the required quality of experimental data. Finally, a first set of results is presented for a new type of NCF-based composite materials.
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Submitted on : Thursday, April 12, 2012 - 9:53:45 AM
Last modification on : Wednesday, June 24, 2020 - 4:18:53 PM


  • HAL Id : emse-00687052, version 1


Jérôme Molimard, Rodolphe Le Riche, Alain Vautrin, J.R Lee. Identification of the four orthotropic plate stiffnesses using a single open-hole tensile test. 2004 SEM X International Congress & Exposition on Experimental & Applied Mechanics, Jun 2004, Costa Mesa, United States. pp.24829. ⟨emse-00687052⟩



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