Vibration and noise pollution is one of the main in modern society. In order to obtain good vibration damping effect, more effective phononic crystals should be designed. Based on theory elastic wave propagation solids, three types are designed this paper using tungsten blocks embedded a rubber matrix, which cup-shaped crystal, solid cylindrical hollow crystal. Firstly, band gap characteristics...

We develop a hydroelastic model based on a {3,2}-order sandwich composite panel theory and Wagner’s water impact theory for investigating the fluid–structure interaction during the slamming process. The sandwich panel theory incorporates the transverse shear and the transverse normal deformations of the core, while the face sheets are modeled with the Kirchhoff plate theory. The structural mode...

This numerical study compares single-phase forced convective heat transfer between two sandwich panels with tetrahedral metallic lattice cores separately fabricated by investment casting and the more cost-effective metal sheet folding method. The numerical model is validated against available experimental data. For a given Reynolds number and core porosity, the results reveal that the brazed sa...

Composite sandwich materials have yet to be widely adopted in the construction of naval vessels despite their excellent strength-to-weight ratio and low radar return. One barrier to their wider use is our limited understanding of their performance when subjected to air blast. This paper focuses on this problem and specifically the strength remaining after damage caused during an explosion. Carb...

In order to obtain a lightweight, high strength, and large design space wooden sandwich structure meet the needs of modern buildings, mechanical properties fabricated 2D pyramid lattice were studied. this paper, compressive specimens with different arrangement Lattice Sandwich unit cells are The upper lower panels core materials made into single cell by inserting glue, prefabricated truss is pr...

Sandwich panels are used in many industries for their lightweight compared to high strength. Most of the sandwich application bending and compression, which relies on core type panel. Widely additive manufacturing is pyramid cell cores. In this article, two new cores, reinforced model C-half circle model, proposed replace pyramidal verify advantages disadvantages with respect it compression ben...

Abstract Cylindrical shell structures are ubiquitous and essential supporting in various engineering applications. The aim of this research work is to provide a comprehensive overview the behavior cylindrical under different loading conditions, including external pressure, axial compression, bending moment. study found that shells was affected by their geometry, diameter, length, thickness, imp...