Local buckling analysis of omega-stringer-stiffened composite panels using a new closed-form analytical approximate solution
Local buckling analysis of omega-stringer-stiffened composite panels using a new closed-form analytical approximate solution
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DOI：
10.1016/j.tws.2019.106534
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发表时间：
2020-02
影响因子：
6.4
通讯作者：
J. Schilling;C. Mittelstedt
中科院分区：
文献类型：
--
作者：
J. Schilling;C. Mittelstedt
对于飞机、航天器和海洋船舶的初步结构设计，计算效率高且足够精确的计算方法是必要的。目前的工作有助于这一领域推导出一个新的封闭形式的分析解决方案的局部屈曲分析的Ω-桁条加筋复合材料板。因此，组件的板被单独建模，并且包括加强件脚。最小势能的原则是在一个里兹式的方法，并导致一个明确的分析公式的临界屈曲载荷。保证了对几何和动态边界条件的符合性。板是单轴加载和调查不同的几何和材料配置。为了验证所提出的方法，进行有限元分析，以及Lévy型的解决方案。非常好的协议，新的封闭形式的分析方法与有限元分析显示在数值研究的技术相关领域的设计空间。
For the preliminary structural design of aircraft, spacecraft and marine vessels, computationally efficient and sufficiently accurate computational methods are necessary. The present work contributes to this field by deriving a new closed-form analytical solution for the local buckling analysis of omega-stringer-stiffened composite panels. Hereby, the plates of the assembly are modelled separately and include the stiffener foot. The principle of the minimum potential energy is used in a Ritz-like approach and leads to an explicit analytical formulation of the critical buckling load. The compliance to geometric and dynamic boundary conditions is ensured. The panel is uniaxially loaded and investigated for different geometrical and material configurations. For the verification of the presented method, a finite element analysis is performed as well as a solution of the Lévy type is obtained. Very good agreement of the new closed-form analytical approach with finite element analyses is shown in numerical studies for technical relevant areas of the design space.