含口盖复合材料圆柱壳轴压屈曲性能分析

doi:10.13229/j.cnki.jdxbgxb201501028

摘要/Abstract

摘要： 对完整复合材料圆柱壳进行了轴向压缩破坏试验，得到了圆柱壳的载荷-应变曲线和破坏载荷，试验结果表明:在轴压载荷作用下，圆柱壳的破坏形式为屈曲破坏。结合ANSYS有限元软件对复合材料圆柱壳进行屈曲分析，有限元计算结果与试验结果一致，验证了模型和计算方法的有效性。利用所建立的模型，对圆柱壳的铺层顺序进行改进设计，分析了铺层角度对开口圆柱壳屈曲载荷的影响。在开口处加装复合材料口盖进行补强，计算了不同口盖铺层方式下的柱壳屈曲强度。计算结果表明:优化复合材料叠层顺序可提升结构的屈曲载荷，开口后圆柱壳的轴向屈曲载荷大幅降低，加装口盖可使开口圆柱壳的轴向稳定性得到有效的增强。提出了一种提高含口盖的复合材料圆柱壳轴向屈曲强度的改进设计方法，为复合材料壳体的稳定性设计提供参考。

关键词: 复合材料, 圆柱壳, 口盖, 屈曲分析

Abstract: Axial compressive failure test of composite cylindrical shell was carried out. The failure load and the load-strain curves were collected. The results show that the damage form of the cylindrical shell under axial compressive load is buckling failure. Software ANSYS was used to simulate the buckling process of cylindrical shell. The simulation results agree with the test results, which verify the finite model and the computation method. Based on the model, modified design of ply stacking-sequence for the cylindrical shell was carried out, and the influence of fiber ply angle on buckling load of the shell with opening was analyzed. A composite cover was installed to reinforce the composite cylindrical shell, and the buckling load of the cylindrical shell with cover under different ply methods was calculated. Results show that optimization of ply stacking-sequence can enhance the buckling load of the shell. The buckling load of the cylindrical shell with opening decreased significantly; while installation of the cover can reinforce the cylindrical shell effectively. A method to improve the axial buckling strength of composite cylindrical shell with cover was proposed, which can provide a reference to stability design of composite shells.

Key words: composite materials, cylindrical shell, cover, buckling analysis

中图分类号:

TB330.1

闫光，韩小进，闫楚良，祝连庆. 含口盖复合材料圆柱壳轴压屈曲性能分析[J]. 吉林大学学报(工学版), 2015, 45(1): 187-192.

YAN Guang, HAN Xiao-jin, YAN Chu-liang,ZHU Lian-qing. Buckling analysis of composite cylindrical shell with cover under axial compressive load[J]. 吉林大学学报(工学版), 2015, 45(1): 187-192.

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