Experimental investigation and theoretical modeling reveal insights on vibration characteristics in composite materials, indicating optimization potential.
This study presents theoretical and experimental investigation into the vibration characteristics of Shear Thickening Gel/Polyurethane Foam Fiber-Reinforced Composite Sandwich Panels (STG/PUF-CSP). A dynamic model of the composite sandwich panel is established based on the First-order Shear Deformation Theory (FSDT), where the mode shape functions are represented using orthogonal polynomials, and the natural characteristics are solved via the Rayleigh-Ritz Method. Experimental data are collected by a self-built vibration testing system, and good agreement between theoretical predictions and measured natural frequencies validates the model. Parametric studies based on the validated model analyze the influence of core parameters (thickness, density, elastic modulus) on vibration characteristics. The prepared core has lightweight, high resilience and excellent shear thickening properties, providing new insights for sandwich core material selection, while the model offers theoretical support for STG/PUF-CSP vibration performance prediction and optimization.
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Xu et al. (2026) studied this question.
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