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Related Experiment Video

Updated: Nov 15, 2025

Author Spotlight: Enhancing Fiber Composite Laminate Quality with the Wet Hand Lay-Up/Vacuum Bag Process
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Full-Field Operational Modal Analysis of an Aircraft Composite Panel from the Dynamic Response in Multi-Impact Test.

Ángel Molina-Viedma1, Elías López-Alba2, Luis Felipe-Sesé1

  • 1Departamento de Ingeniería Mecánica y Minera, Campus Científico Tecnológico de Linares, Universidad de Jaén, 23700 Linares, Spain.

Sensors (Basel, Switzerland)
|March 6, 2021
PubMed
Summary

This study uses multi-impact excitation on composite aircraft panels to analyze energy absorption and modal parameters. A single test efficiently characterizes panel dynamics, reducing validation time and costs.

Keywords:
aircraft structurescomposite materialsimpact testingvision-based modal analysis

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Area of Science:

  • Aerospace Engineering
  • Materials Science
  • Structural Dynamics

Background:

  • Aircraft component validation requires extensive, costly tests for structural, aerodynamic, and acoustic properties.
  • Dynamic characterizations, including impact energy absorption and modal parameter identification, are crucial for aircraft safety and performance.

Purpose of the Study:

  • To investigate the dynamic behavior of a stiffened composite aircraft panel under multi-impact excitation.
  • To explore the feasibility of performing impact analysis and modal identification within a single experimental campaign.

Main Methods:

  • A stiffened composite aircraft panel was subjected to multi-impact excitation.
  • High-speed 3D digital image correlation measured the panel's vibration response.
  • Full-field operational modal analysis was employed for modal identification.

Main Results:

  • The study successfully characterized multiple vibration modes across a wide spectrum.
  • Consistent modal behavior and good mode separation were observed, validated by the auto modal assurance criterion (Auto-MAC).
  • The linear response assumption with small strains was maintained, neglecting local damage nonlinearities.

Conclusions:

  • A single test can effectively provide both impact energy absorption insights and modal parameter identification for composite aircraft panels.
  • This integrated approach significantly reduces testing time and investment for structural validation.
  • Full-field, non-invasive techniques offer a powerful method for comprehensive dynamic characterization.