In the last decades wood has assumed an increasing relevance in building engineering both due to new technologies in wood production and manufacturing, such as computer-aided optimization of log sawing, automated lumber grading etc., and to the development of the green building. Fibrous structure of the wood makes it an orthotropic material so that it becomes important to perform a measurement, which allows to fully characterize the orthotropic properties of the specimen. Hybrid numerical-experimental techniques can be used in order to accurately determine the Young modulus and the Poisson coefficient of the material. In this paper a hybrid procedure based on an optical technique (Electronic Speckle Pattern Interferometry, ESPI) and a numerical optimization algorithm was implemented in order to characterize a specimen of a laminated soft wood. Three-point-bending experimental tests were carried out and the material properties were iteratively modified in order to minimize the difference between the experimentally measured displacement field and the corresponding displacement field obtained by FEM calculations.
Hybrid characterization of laminated wood with ESPI and optimization methods / Barile, C; Casavola, C; Pappalettera, G; Pappalettere, C. - STAMPA. - (2013), pp. 75-83. (Intervento presentato al convegno Annual Conference on Experimental and Applied Mechanics, 2012 tenutosi a Costa Mesa, CA nel June 11-14, 2012) [10.1007/978-1-4614-4235-6_9].
Hybrid characterization of laminated wood with ESPI and optimization methods
Barile, C;Casavola, C;Pappalettera, G;Pappalettere, C
2013-01-01
Abstract
In the last decades wood has assumed an increasing relevance in building engineering both due to new technologies in wood production and manufacturing, such as computer-aided optimization of log sawing, automated lumber grading etc., and to the development of the green building. Fibrous structure of the wood makes it an orthotropic material so that it becomes important to perform a measurement, which allows to fully characterize the orthotropic properties of the specimen. Hybrid numerical-experimental techniques can be used in order to accurately determine the Young modulus and the Poisson coefficient of the material. In this paper a hybrid procedure based on an optical technique (Electronic Speckle Pattern Interferometry, ESPI) and a numerical optimization algorithm was implemented in order to characterize a specimen of a laminated soft wood. Three-point-bending experimental tests were carried out and the material properties were iteratively modified in order to minimize the difference between the experimentally measured displacement field and the corresponding displacement field obtained by FEM calculations.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
