Abstract

In this article, free vibration finite element analysis of variable stiffness composite laminate (VSCL) beams is carried out. The variable stiffness of laminated beams is acquired by using laminates with curvilinear fibers instead of straight fibers. The analysis is based on the higher-order theories that have been presented by Carrera Unified Formulation (CUF). Equivalent Single Layer (ESL) model, which is independent of the number of constitutive layers, has been utilized to consider a number of unknown variables. Several numerical results for the analysis of VSCL beams are presented and the effect of the fiber orientation angle and various boundary conditions on the natural frequencies are demonstrated.

摘要

在本文中，对变刚度复合层合板（VSCL）梁进行了自由振动有限元分析。通过使用具有曲线纤维而不是直纤维的层压板来获得层压梁的可变刚度。该分析基于 Carrera 统一公式 (CUF) 提出的高阶理论。等效单层 (ESL) 模型与本构层数无关，已被用于考虑许多未知变量。给出了 VSCL 梁分析的几个数值结果，并证明了纤维取向角和各种边界条件对固有频率的影响。