Dynamic material parameters in an anisotropic plate estimated by phase-stepped holographic interferometry

Fällström, Karl-Evert; Olofsson, Kenneth; Saldner, Henrik O.; Schedin, Staffan

doi:10.1016/0143-8166(95)00100-x

Cited by 20 publications

(8 citation statements)

References 10 publications

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“…The out-of-plane deflection fields are computed by a simple trapezoidal numerical integration of the slope fields using equations (4) and (5). If ðx; yÞ are the coordinates of any point of the surface of the plate in a given coordinate system and if gðx; yÞ and hðx; yÞ are, respectively, the slope fields along the x and y directions, these fields derive from the deflection field f ðx; yÞ by: gðx; yÞ ¼ @f ðx; yÞ @x ; hðx; yÞ ¼ @f ðx; yÞ @y ð4Þ…”

Section: Full-field Processingmentioning

confidence: 99%

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Stiffness and Damping Identification from Full Field Measurements on Vibrating Plates

2006

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The paper presents an experimental application of a method leading to the identification of the elastic and damping material properties of isotropic vibrating plates. The theory assumes that the searched parameters can be extracted from curvature and deflection fields measured on the whole surface of the plate at two particular instants of the vibrating motion. The experimental application consists in an original excitation fixture, a particular adaptation of an optical full-field measurement technique, a data preprocessing giving the curvature and deflection fields and finally in the identification process using the Virtual Fields Method (VFM). The principle of the deflectometry technique used for the measurements is presented. First results of identification on an acrylic plate are presented and compared to reference values. Results are discussed and improvements of the method are proposed.

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Section: Full-field Processingmentioning

confidence: 99%

“…More recently, the above approach was refined by using not only modal frequencies but also mode shapes. This resulted in more robust identification, particularly for the through-thickness shear moduli and Poisson_s ratio [4,5].…”

Section: Introductionmentioning

confidence: 97%

Stiffness and Damping Identification from Full Field Measurements on Vibrating Plates

2006

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“…Starting from the pioneers (Cornu, 1869;Timoshenko and Goodier, 1970), many authors, encouraged by the diffusion of the coherent light sources, developed a large number of static (Jones and Bijl, 1974;Archbold et al, 1978;Zhu, 1996;Ganesian, 1989;Grédiac and Vautrin, 1993;Gascon and Salazar, 1996;Furgiuele et al, 1997;Apalkov et al, 1999;Bruno et al, 2002aBruno et al, ,b, 2006aBruno and Poggialini, 2005;Grédiac et al, 2006) or dynamic techniques (Fällströ m and Jonsson, 1991;Fällströ m et al, 1996;Grédiac et al, 1998;Gaul et al, 1999).…”

Section: Introductionmentioning

confidence: 98%

Elastic characterization of orthotropic plates of any shape via static testing

Bruno

Felice

Pagnotta

et al. 2008

International Journal of Solids and Structures

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The paper presents an inverse procedure for identifying elastic properties of isotropic or orthotropic materials from the full-field measurement of the surface displacements of plates under flexural loading configurations. The procedure is based on a numerical-experimental optimisation process which minimizes an error function defined by subtracting the experimental data from the outputs of the numerical analysis. In each iteration the optimisation process updates the values of the elastic constants in a finite element model of the specimen used in the experimental tests. The unknown parameters are simultaneously identified by a single test and without damaging the structural integrity of the specimen. The possibility of using the methodology for characterizing any-shaped plates was investigated. The applicability and the robustness of the procedure were carried out on aluminum and unidirectional Graphite/PEEK laminate specimens. Phase-shifting speckle interferometry was employed to detect the out-of-plane displacement field of a portion of the observed surface of the specimen.

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“…It was even applied in dynamics, initially for stiness [31,32] and then also for damping identication [13,33], with very successful results. It is also worth noting that some authors managed the same identication using nite element model updating on static [34] or dynamic [35] tests.…”

Section: The Virtual Fields Methods In the Case Of Plate Bendingmentioning

confidence: 99%

Identification of the local stiffness reduction of a damaged composite plate using the virtual fields method

Kim

Pierron

Wisnom

et al. 2007

Composites Part A: Applied Science and Manufacturing

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For the purpose of returning to Earth And I do not call one a Brahmana on account of his birth or of his origin from (a particular) mother; (but) the one who is possessed of nothing and seizes upon nothing, him I call a Brahmana.The man who is free from anger, endowed with (holy) works, virtuous, without desire, subdued, and wearing the last body (antimasarira), him I call a Brahmana.The man who is not hostile amongst the hostile, who is peaceful amongst the violent, not seizing (upon anything) amongst those that seize (upon everything), him I call a Brahmana.Whosoever has passed over this quagmire dicult to pass, (who has passed over) revolution (samsara) and folly, who has crossed over, who has reached the other shore, who is meditative, free from desire and doubt, calm without seizing (upon anything), him I call a Brahmana. Sutta Nipata, Book 3, Chapter 9 AcknowledgementsThis thesis is the record of my four years' exploration into a new world and myself.

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Dynamic material parameters in an anisotropic plate estimated by phase-stepped holographic interferometry

Cited by 20 publications

References 10 publications

Stiffness and Damping Identification from Full Field Measurements on Vibrating Plates

Stiffness and Damping Identification from Full Field Measurements on Vibrating Plates

Elastic characterization of orthotropic plates of any shape via static testing

Identification of the local stiffness reduction of a damaged composite plate using the virtual fields method

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