复合材料圆锥壳体的外压稳定性*

本文采用Donnell型扁壳理论,在文献[1]的基础上,应用能量变分法分析了在均布外压作用下复合材料叠层圆锥壳体的稳定性问题,得到了临界载荷的近似表达式.数值结果表明,临界载荷的理论预示值与实验结果非常吻合.最后,讨论了材料弹性常数、铺层参数等因素对临界载荷的影响.本文所得结果对航空航天结构设计具有重要参考价值.

Stability of Laminated Composite Circular Conical Shells under External Pressure

In this paper, based on the mixed-type theory developed by the same authors[1], a theoretical analysis is presented for the stability of laminated composite circular conical shells under external pressure. The formulas for critical external pressure are obtained by using the potential energy variation principle. Very good agreement is shown between the theortical prediction of critical external pressure and the experimental data. Finally, the influence of some parameters on critical external pressure is discussed numerically. The mixed-type theory developed by the same authors[1] and the results obtained in this paper are very useful in aerospace engineering design.