Simulation of a crack in stiffened plates via a meshless formulation and FSDT

Simulation of a crack in stiffened plates via a meshless formulation and FSDT
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通过无网格公式和 FSDT 模拟加劲板中的裂纹

DOI:
10.1016/j.ijmecsci.2017.07.063
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发表时间:
2017-10
影响因子:
7.3
通讯作者:
Teng Xiaodan
Teng Xiaodan
中科院分区:
工程技术1区
文献类型:
--
作者:
Peng L. X.;Tao Yueping;Liang Ning;Li Linyuan;Qin Xia;Zeng Zhiping;Teng Xiaodan

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本文介绍了加筋板断裂分析的无网格法。基于作者提出的一种改进的加筋板无网格化模型,通过实现平板和肋板之间的位移协调条件将平板和肋板结合在一起,用绕射法引入了裂纹。采用了基于−1分布的扩展基函数和权函数。继承了该模型的无网格优点,公式中的筋可以设置在平板上的任何位置,并且当筋位置改变时,自然避免了对平板的重新网格划分。利用所提出的公式和商用有限元软件ANSY进行了数值算例分析,验证了所提出公式的准确性。讨论了肋骨对含裂纹加筋板的位移、应力和应力强度因子的影响。
A meshless formulation for fracture analysis of stiffened plates is introduced in this paper. Based on an improved meshless model of stiffened plates proposed by the authors, in which flat plate and ribs are combined by implementing the displacement compatibility conditions between them, a crack is introduced by the diffraction method. The expanded basis function and the weight function based ont−1distribution are employed. Inheriting the meshless advantages from the model, the ribs in our formulation can be set at any location on the flat plate, and the remeshing of the flat plate is naturally avoided when rib location changes. Some numerical examples are investigated by the proposed formulation and the commercial FEM software ANSYS, and the accuracy of the proposed formulation is verified. The effects of ribs on the displacement, stress and SIFs of the stiffened plates that have cracks are discussed.
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