Wave Propagation in Elastic Composite Structures

Wave propagation in elastic composite structures investigates how mechanical disturbances travel through materials composed of two or more phases, each with distinct elastic properties. Composite architectures—such as layered plates, cylindrical tubes and sandwich panels—are engineered to tailor wave speeds, attenuation and dispersive behaviour for applications in civil engineering, aerospace, energy and nondestructive evaluation. The interplay of geometry, property contrasts and interface conditions gives rise to multiple guided modes, frequency-dependent phase velocities and band gaps. Analysing dispersion relations and mode shapes enables optimisation of composites for vibration suppression, impact resistance and selective frequency filtering. Recent advances in asymptotic analysis, numerical simulation and experimental validation have deepened understanding of how grading, coatings and external loads influence wave characteristics in composite media.

Research from Nature Portfolio

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Research from all publishers

Recent investigations have explored surface and guided waves in inhomogeneous tubular and layered composites under realistic loading and thermal conditions. Analytical and numerical studies of a bi-elastic cylindrical tube on a Winkler elastic foundation demonstrate that both foundation stiffness and radial property gradients significantly hinder surface-wave propagation, with strong attenuation when dimensionless load and inhomogeneity parameters exceed moderate thresholds. Low-frequency antiplane shear in asymmetric three-layered sandwich plates has been analysed asymptotically, yielding simplified one-dimensional motion equations that distinguish fundamental and harmonic modes; high-contrast skins produce slow waves with pronounced decay, offering routes to tune cutoff frequencies and decay rates. Thermoelastic effects and external pressure have been incorporated into models of coaxial hollow cylinders, where coupled normal-mode and Laplace transform methods reveal that transient heating and mechanical loading modify both displacement and temperature fields, altering dispersive phase speeds across broad frequency bands. Studies of multilayered membranes with fractional-order constitutive models show that non-integer temporal operators introduce additional dispersion control, enabling fine adjustment of phase velocity and attenuation in both long- and short-wave regimes.

Wave Propagation in Elastic Composite Structures publication trend

The graph below shows the total number of articles in wave propagation in elastic composite structures across all publications each year (not limited to Nature Index journals).

Technical terms

Composite structure: A material system combining two or more distinct phases to achieve tailored elastic properties.

Dispersion relation: A mathematical relationship linking wave frequency to wave number, determining phase and group velocities.

Antiplane shear: A deformation mode in which displacement is perpendicular to the plane of interest, simplifying two-dimensional wave analysis.

Winkler foundation: A model representing an elastic support that exerts a linear reactive pressure proportional to local displacement.

Fractional-order infusion: A formulation employing derivatives of non-integer order to describe memory effects and anomalous dispersion in materials.

References

1. Modeling the dispersion of waves on a loaded bi-elastic cylindrical tube with variable material constituents. Results in Physics (2023).
2. Antiplane shear of an asymmetric sandwich plate. Continuum Mechanics and Thermodynamics (2021).
3. Wave propagation in an elastic coaxial hollow cylinder when exposed to thermal heating and external load. Results in Physics (2022).
4. Modeling the Dispersion of Waves in a Multilayered Inhomogeneous Membrane with Fractional-Order Infusion. Fractal and Fractional (2024).