Inverse method based on modal analysis for characterizing the constitutive properties of thick composite plates

Overview of Identification Methods of Mechanical Parameters Based on Full-field Measurements

“…In [12], the elastic properties of a human basin are identified from surface measurements using a 3-D FEM model featuring two homogeneous materials. Data from modal analyses is used in [22] Bending rigidities of thin anisotropic plates. Several studies concern the identification of the bending rigidities of thin anisotropic plates, e.g.…”

Techniques for Identification of Bending and Extensional Elastic Stiffness Matrices on Thin Composite Material Plates Based on Virtual Field Method (VFM): Theoretical and Numerical Aspects

“…The difference among the identification techniques based on these iterative procedures is basically in the way as the optimization problem is formulated, for example, the type of adopted search method to find the minimal, the boundary conditions, the geometric characteristics of the samples, the type of anisotropy of the test material, the type of experimental devices, and the numerical method used to compute the mode shapes (or operational modes) with their respective frequencies (Deobald & Gibson, 1988;Pedersen & Frederiksen, 1992;Lai & Lau, 1993;Ayorinde & Gibson, 1995;Rikards & Chate, 1998;Ayorinde & Yu, 1999Rikards et al, 1999;Bledzki et al, 1999;Hwang & Chang, 2000;Araujo et al, 2000;Chakraborty & Mukhopadhyay, 2000;Rikards et al, 2001;Lauwagie et al, 2003;Lauwagie et al, 2004;Lee & Kam, 2006;Cugnoni et al, 2007;Bruno et al, 2008;Diveyev & Butiter, 2008a, 2008b. In works that do not use iterative process, natural frequencies and mode shapes, or operational frequencies and modes, are input data of an algorithm based on the differential equation that governs the transversal vibration of sample in a specific direction and under specific boundary conditions (Gibson, 2000;Alfano & Pagnotta, 2007).…”

Modal validation of sandwich shell finite elements based on a p‐order shear deformation theory including zigzag terms

“…The plate investigated is a 150×59×10 mm 3 16-ply [0/90] 4s E-glass/polypropylene (glass/PP) laminate. In order to obtain realistic values for the elastic constants of the structure, a specimen has been manufactured with 0.625-mm-thick Twintex ® (Vetrotex TM ) prepegs based on a 4:1 fibre weave, and the values assigned to the single-layer elastic properties have been derived with a mixed numerical/experimental modal identification procedure [34]. The corresponding constitutive properties are given in Table I, and the mass density is taken as 1510 kg/m 3 .…”

“…The structure adopted is a 250×230×9.2 mm 3 plate with an 8-mm-thick honeycomb core and two 0.6-mm-thick [0/90] and [90/0] glass fibrereinforced epoxy skins. In order to assign realistic values to the constitutive properties of the plate, a specimen made of a Nomex ® (DuPont TM ) core and Chomarat TM skins has been produced and the single-layer mechanical constants for both materials have been determined by means of a modal numerical/experimental identification procedure [34] based on a 3D finite element model. The values extracted are listed in Table V, and the mass density is taken as 80 kg/m 3 for the core and 1995 kg/m 3 for the skins, respectively.…”