Wave propagation analysis of sandwich plates with graphite particles filled viscoelastic material core in hygrothermal environments

• Published in: Composite structures Vol. 288; p. 115380
• Main Authors: Hua, Fenfei, Fu, Wanbiao, Zhou, Xiaoqiang
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.05.2022
• Subjects: Hygrothermal effects; Particulate composite; Sandwich plates; Viscoelastic material; Wave propagation; Hygrothermal effects; Particulate composite; Sandwich plates; Wave propagation; Viscoelastic material
• ISSN: 0263-8223; 1879-1085
• DOI: 10.1016/j.compstruct.2022.115380

In the present work, the wave propagation behavior of sandwich plates with graphite particles filled viscoelastic material core under the hygrothermal environments is investigated. A four-variable integral higher-order shear deformation theory (HSDT) and the Hamilton’s principle are applied to derive the equations of motion and the corresponding wave dispersion relations. The accuracy and effectiveness of the present model are verified by comparison with previous research. The effective properties of the particulate composite are accurately determined by a differential scheme with consideration of the particle interactions. Results imply that increased effective moduli are obtained through incorporating the graphite particles, or decreasing the temperature or increasing the moisture. Influences of the volume fraction of graphite particle, the core-to-face layer thickness ratio, temperature and moisture on the wave dispersion responses are quantitatively analyzed and qualitatively assessed. It has been found that the hygrothermal environments play a significant role in the wave propagation characteristics.