Improving material damping characterization of a laminated plate

• Published in: Journal of sound and vibration Vol. 462; p. 114928
• Main Authors: Wesolowski, M., Barkanov, E.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Ltd 08.12.2019; Elsevier Science Ltd
• Subjects: Air damping; Anisotropy; Composite materials; Composite structures; Computer simulation; Damping; Design of experiments; Dynamic response; Dynamic tests; Finite element analysis; Finite element method; Identification; Inverse technique; Laminates; Mathematical models; Optimization; Plates (structural members); Response surface methodology; Strain energy; Vacuum chamber; Vacuum chambers; Vibration; Vibration damping; Inverse technique; Identification; Laminates; Air damping; Strain energy; Vacuum chamber
• ISSN: 0022-460X; 1095-8568
• DOI: 10.1016/j.jsv.2019.114928

Laminated composite structures have considerably higher ability for the vibration damping than structures made of conventional materials. On the other hand the prediction of damping of composite structures is not straightforward due to their anisotropic behaviour. The anisotropic nature of composites brings the need for the accurate measurement of the damping parameters which are used for the prediction of the dynamic response. The present study concerns with the effectiveness and efficiency improvements of the inverse technique used for the identification of material damping coefficients of a laminated plate. The evaluated identification method combines numerical and experimental analyses. The effectiveness improvement of the method is realized by application of a vacuum chamber for dynamic tests in order to reduce the influence of the air damping on the identified damping coefficients. The efficiency improvement of the method is gained by proper definition of the minimization process with the use of the experiment design, the response surface methodology, and the strain energy approach for damping modelling. The Finite Element Modelling is realized using ABAQUS software and the minimization problem is defined using Isight environment. [Display omitted] •Identified damping properties of a laminated composite plate are burdened with the measurement error due to air damping.•The air damping overestimates the results of the damping properties of a laminated composite plate.•A vacuum chamber should be provided in order to improve the damping properties identification of laminated composite plates.