Finite element vibration analysis of composite skew laminates containing delaminations around quadrilateral cutouts

• Published in: Composites. Part B, Engineering Vol. 40; no. 3; pp. 225 - 236
• Main Authors: Park, T., Lee, S.-Y., Voyiadjis, G.Z.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01-04-2009; Elsevier
• Subjects: Composite laminate; Delamination; Exact sciences and technology; Free vibration; Fundamental areas of phenomenology (including applications); Physics; Skew angle; Solid mechanics; Structural and continuum mechanics; Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...); Free vibration; Delamination; Skew angle; Composite laminate; Theoretical study; Laminated plate; Composite material; Finite element method; Cutting; Shear deformation; Rectangular plate; Numerical simulation; Skew plate
• ISSN: 1359-8368; 1879-1069
• DOI: 10.1016/j.compositesb.2008.11.004

The free vibration analysis of laminated composite skew plates with delamination around a centrally located quadrilateral cutout is carried out based on the high-order shear deformation theory (HSDT) in this study. In the finite element formulation for the delamination around cutout, the seven degrees-of-freedom per each node are used with transformations in order to fit the displacement continuity conditions at the delamination region. The numerical results obtained for the rectangular plates are in good agreement with those of other preceding investigations. The new results for skew plates in this study mainly show the effect of the interactions between the skew angle and other various parameters, for example, cutout size, delamination area, and length-to-thickness ratio. Key observation points are discussed and a brief design guideline is given.