Effect of temperature and moisture on free vibration characteristics of skew laminated hybrid composite and sandwich plates

• Published in: Thin-walled structures Vol. 157; p. 107113
• Main Authors: Kallannavar, Vinayak, Kumaran, Balaji, Kattimani, S.C.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2020
• Subjects: Effect of temperature and moisture; Finite element analysis; Hybrid composites; Sandwich plate; Shear deformation theory; Hybrid composites; Shear deformation theory; Sandwich plate; Finite element analysis; Effect of temperature and moisture
• ISSN: 0263-8231; 1879-3223
• DOI: 10.1016/j.tws.2020.107113

This paper is concerned with the effect of variation in temperature and moisture concentration on free vibration response of skew laminated hybrid composite and sandwich plates. The coupled thermo-elastic and hygro-elastic finite element model is formulated using the first-order shear deformation theory (FSDT). Uniform temperature and moisture concentration rise is considered for the analysis. Soft-core viscoelastic materials are considered for the sandwich plates and are modeled using the complex modulus approach. Linear strain-displacement relations are used to develop a mechanical stiffness matrix, and the initial stress stiffness matrix is generated using non-linear strain-displacement relations to represent the non-mechanical stiffness matrix. Numerical examples for the generated finite element model are presented and discussed comprehensively to understand the effect of temperature, moisture concentration, skew angle, length to width ratio, length to thickness ratio, and boundary conditions on the vibration response of the laminated hybrid composite and sandwich plates. Further investigation is devoted to studying the influence of temperature and moisture concentration-dependent material properties, stacking sequence, core to face sheet thickness ratio, and fiber orientation on vibration behavioral response of sandwich and hybrid composite plates. •Effect of temperature and moisture on free vibration response of skew hybrid composite and sandwich plates is investigated.•First-order shear deformation theory is used to develop the coupled thermo-elastic and hygro-elastic finite element model.•Effect of geometric parameters on vibration characteristics at elevated temperature and moisture conditions is investigated.