TY - JOUR
T1 - A semi-analytical approach for the analysis of variable-stiffness panels with curvilinear stiffeners
AU - Vescovini, Riccardo
AU - Oliveri, Vincenzo
AU - Pizzi, Davide
AU - Dozio, Lorenzo
AU - Weaver, Paul M.
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2020/4
Y1 - 2020/4
N2 - A semi-analytical method is developed for the analysis of composite stiffened panels, where stiffness variability is achieved through a combination of fiber steering and curvilinear stringers. The approach relies upon a 2D plate model for the skin and a 1D beam description for the stiffeners, according to first-order shear deformation theory. The approach is developed in the framework of a displacement-based formulation, where Legendre polynomials are used for approximating the displacement field, and the Ritz method is used for the solution strategy. The resulting tool is characterized by its excellent computational efficiency, and allows problems in free-vibrations, buckling and thermal buckling to be solved with reduced effort. The quality of the results is assessed by an extensive set of comparison against results from the literature, demonstrating the potential of the tool as a means for performing preliminary parametric studies for these variable-stiffness, variable-geometry structures.
AB - A semi-analytical method is developed for the analysis of composite stiffened panels, where stiffness variability is achieved through a combination of fiber steering and curvilinear stringers. The approach relies upon a 2D plate model for the skin and a 1D beam description for the stiffeners, according to first-order shear deformation theory. The approach is developed in the framework of a displacement-based formulation, where Legendre polynomials are used for approximating the displacement field, and the Ritz method is used for the solution strategy. The resulting tool is characterized by its excellent computational efficiency, and allows problems in free-vibrations, buckling and thermal buckling to be solved with reduced effort. The quality of the results is assessed by an extensive set of comparison against results from the literature, demonstrating the potential of the tool as a means for performing preliminary parametric studies for these variable-stiffness, variable-geometry structures.
KW - Buckling
KW - Curvilinear stiffeners
KW - Free-vibrations
KW - Ritz method
KW - Variable-stiffness
UR - http://www.scopus.com/inward/record.url?scp=85074426814&partnerID=8YFLogxK
U2 - 10.1016/j.ijsolstr.2019.10.011
DO - 10.1016/j.ijsolstr.2019.10.011
M3 - Article
AN - SCOPUS:85074426814
SN - 0020-7683
VL - 188-189
SP - 244
EP - 260
JO - International Journal of Solids and Structures
JF - International Journal of Solids and Structures
ER -