摘要
采用商业有限元软件ABAQUS对盒段的后屈曲承载能力进行了分析,重点研究了在弯扭载荷条件下后屈曲诱发的盒段蒙皮/缘条界面的失效问题。在此基础上,采用缝线对墙缘条与蒙皮的界面进行增强,应用粘接元模拟缝线,研究缝线对复合材料多墙盒段的破坏模式和承载能力的影响,并对缝线增强后的盒段的承载能力进行了试验研究。有限元分析表明,复合材料多墙盒段具有较长的后屈曲历程,采用缝线增强技术能够明显改善盒段的后屈曲承载能力,预测结果与试验值吻合良好,而且预测的失效模式也与试验结果一致。
The post-buckling loading capability of the box was analyzed with the commercial software ABAQUS, focusing on the failure of skin/flange interface induced by post-buckling under bend-twist loading. Based on the FEM results, the skin/flange interface was enhanced by stitch which was simulated by using cohesive element, and the impact of stitch on failure mode and loading capability of the box was discussed. Moreover, the loading capability of reinforced box was studied by testing. The FEM results show that the multi spar composite box has a long post-buckling period, and the post-buckling loading capability of the box reinforced by stitching technique could be improved significantly. The predicted results coincide well with experimental data, and the failure mode is also consistent with test results.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2013年第5期174-179,共6页
Acta Materiae Compositae Sinica
关键词
复合材料
多墙盒段
试验
后屈曲
缝线
承载能力
composite
multi-spar box
testing
post-buckling
stitch
loading capability
