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2025 | OriginalPaper | Chapter

Dynamic Assessment of Thick Sandwich Beams Using a Mixed-Refined Zigzag Theory: Experimental Validation Using Laser Doppler Vibrometry

Authors : Matteo Sorrenti, Marco Gherlone, Simão Pedro Lima Carvalho

Published in: Dynamic Response and Failure of Composite Materials

Publisher: Springer Nature Switzerland

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Abstract

Thick sandwich beam structures are commonly used in various engineering applications due to their lightweight and high-stiffness properties. However, their distinct material compositions often result in pronounced transverse shear deformations and in the case of thicker beams, additional transverse normal deformations. The recently developed mixed-higher-order en-RZT for plates is here applied to numerically evaluate the dynamic properties of symmetric thick sandwich beams. In this experimental-numerical study, a series of sandwich beam specimens of different thicknesses, made of ERGAL face-sheets and Rohacell® WF110 core, are dynamically investigated using a Laser Doppler Vibrometry (LDV). The experimental modal parameters (natural frequencies and modal shapes) obtained from LDV measurements are compared with the theoretical predictions for the flexural modes based on a finite element beam model developed on the mixed-Refined Zigzag Theory (\({\text{B - RZT}}_{{\{ 3,2\} }}^{(m)}\)).

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Title: Dynamic Assessment of Thick Sandwich Beams Using a Mixed-Refined Zigzag Theory: Experimental Validation Using Laser Doppler Vibrometry
Authors: Matteo Sorrenti
Marco Gherlone
Simão Pedro Lima Carvalho
Publisher: Springer Nature Switzerland
Book: Dynamic Response and Failure of Composite Materials
Print ISBN: 978-3-031-77696-0

Electronic ISBN: 978-3-031-77697-7

Copyright Year: 2025
DOI: https://doi.org/10.1007/978-3-031-77697-7_37