Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)
Published: May 14, 2025
Language: Английский
Polymer Composites, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 12, 2025
Abstract Damped sandwich composite structures are increasingly used in the aerospace, automotive and energy sectors due to their high damping lightweight properties. Here, a novel porous fiber‐reinforced structure is proposed, by punching holes fiber cloth with impregnated solution, resin flows through during formation of structure, connecting upper lower prepreg layers. This paper focuses on theoretical study free vibration behavior simply supported multilayer arbitrary delamination angles. The vibrational differential equation including orientation angle was established solved using Rayleigh‐Ritz method Navier method. Subsequently, Abaqus finite element modal test analysis were evaluate dynamic performance different angles, verify proposed model solution strategy, perform structural optimization based genetic algorithm. results show that panel area ratio layer 94.854% multiples 45° has excellent performance. significant advantages improving stiffness provides basis for practical engineering applications. Highlights A plate established. effect studied. An experimental platform constructed corroborate accuracy. Structural conducted influence parameters analyzed.
Language: Английский
Citations
0
Polymer Composites, Journal Year: 2025, Volume and Issue: unknown
Published: April 8, 2025
Abstract This study explores the possibility of enhancing material damping in composites incorporating a viscoelastic layer within structure. A composite plate is considered as case study, and focus on analyzing diverse fiber layups involving carbon, glass, hybrid combinations alongside layer. detailed investigation reports interface effect, comparison made with without effects. First‐order shear deformation theory (FSDT) used, governing equations are derived from Hamilton's principle. The further extended to analyze frequencies loss factors different configurations frequency‐dependent materials, considering parametric variations. Comparative assessments aid identifying designs superior strength, stiffness, properties, offering insights for optimal engineering configurations. Among all combinations, those carbon plies at outermost positions exhibit frequency performance, while glass adjacent provide better factor. Highlights Free vibration various sandwiched studied. Impact interfacial effects factor performance examined. Structure analyzed parameters achieve performance. Frequency‐dependent materials embedded current study.
Language: Английский
Citations
0
Polymer Composites, Journal Year: 2025, Volume and Issue: unknown
Published: March 29, 2025
Abstract Cross‐linked polymeric damping materials with efficient energy dissipation mechanisms have attracted significant attention in impact protection applications. However, conventional viscoelastic frequently encounter limitations processability and operational durability. Herein, a novel high‐dielectric CaCu 3 Ti 4 O 12 /poly(lipoic acid) dynamic covalent network composite was introduced. This advanced material demonstrated an exceptional self‐healing efficiency of 89.7% after 24 h at ambient temperature remarkable reprocessability through thermally activated bond exchange reactions. Upon damage, the material's mechanical strength integrity can be restored via reformation cross‐linking points within polymer network, thereby extending its lifespan. Notably, synergistic combination interfacial polarization effects from particles equilibrium coordination bonds establishes multiple pathways. unique architecture achieves broadband performance loss factors (tan δ) exceeding 0.3 across extended frequency spectrum (0.009–100 Hz), coupled substantial enhancement dielectric constant. The capability verified steel ball rebound experiment, which exceptionally low rate 3.0%. research offers innovative design concept for developing sustainable impact‐resistant materials. Highlights A successfully synthesized. films exhibit outstanding ability reprocessability. composites achieve superior resistance significantly elevated
Language: Английский
Citations
0
Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)
Published: May 14, 2025
Language: Английский
Citations
0