Buckling analysis of unitized curvilinearly stiffened composite panels

Thermal buckling of curvilinearly stiffened laminated composite plates with cutouts using isogeometric analysis

“…Previous researchers [34], [35] and [36] modeled curvilinear stiffeners using a parabolic curve. Using the parametric equation of the parabola and the start and the end point coordinates, one can obtain the three control points which could define the Bezier curve [40].…”

“…Prusty and Satsangi [33] used the same algorithm to perform structural analysis of stiffened isotropic plates and shells. While the aforementioned authors studied straight stiffeners, curvilinearly stiffened panels were analyzed by Tamijani and Kapania [34], Zhao and Kapania [35] and Shi et al [36]. It has been found by Hao et al [37] that curvilinear stiffeners if used can improve the strength margins of panels since they reinforce the cutouts in them.…”

Buckling Optimization of Variable Stiffness Composite Panels for Curvilinear Fibers and Grid Stiffeners

“…The stiffness distribution of the panel was influenced by the angle variation and the distance between the stiffeners. Kapania and his co-authors (see [20][21][22]) employed NURBS (Non-Uniform Rational B-Splines) to describe the reference path of curvilinear stiffeners. It was shown that curvilinear stiffeners could result in a better design than straight stiffeners, but not for all load cases and boundary conditions.…”

A semi-analytical approach for the analysis of variable-stiffness panels with curvilinear stiffeners

“…To overcome this issue, finite element procedures were proposed in Refs. [26][27][28], where stiffeners displacements are expressed as function of those of the skin reference surface using finite element shape functions. In doing so, the generation of the models is made simpler: skin and stiffener elements can be generated independently from one another, and requirements in terms of shared nodes at the skin/stiffener interface need not be fulfilled.…”