Frequency optimization of laminated folded composite plates

TOPAL U., Uzman U.

MATERIALS & DESIGN, vol.30, no.3, pp.494-501, 2009 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 30 Issue: 3
  • Publication Date: 2009
  • Doi Number: 10.1016/j.matdes.2008.05.066
  • Journal Name: MATERIALS & DESIGN
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.494-501
  • Keywords: Laminates, Mechanical, ELEMENT VIBRATION ANALYSIS
  • Karadeniz Technical University Affiliated: Yes


In this study, frequency optimization of symmetrically laminated folded composite plates is presented. The folded plates are modelled as a composite structure that consists of flat plates. The fundamental frequencies of one- and two-fold folded plates are maximized with respect to fibre orientations. The first-order shear deformation theory (FSDT) is used for vibration analysis of laminated folded plates. The modified feasible direction (MFD) method is used for the optimization routine. Therefore a program based on FORTRAN is used. Finally, the significant effects of length-to-thickness ratios, crank angles, different plate lengths and boundary conditions on the optimum results are demonstrated. (C) 2008 Elsevier Ltd. All rights reserved.