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对受到边界约束的不同工艺成型复合材料加筋板进行了轴压试验和数值模拟,研究二次胶接和共固化工艺成型加筋板轴向压缩破坏机理。轴压试验中,通过应变计实时监测试验件局部屈曲,及时记录试验件初始声响载荷,通过断面观测分析结构破坏机理。基于ABAQUS软件建立有限元模型模拟结构后屈曲损伤渐进直至破坏过程。计算结果和试验结果相吻合,研究表明工艺对结构稳定性及承载能力没有显著影响,而加筋板构型影响较大。聚甲基丙烯酰亚胺(Polymethacrylimide,PMI)泡沫不影响结构失稳载荷及破坏载荷,但能延缓结构初始损伤的发生。二次胶接成型加筋板界面临近破坏才出现损伤,而共固化成型加筋板界面损伤出现较早且扩展缓慢,表现出更好的损伤阻抗特性。
The axial compression tests and numerical simulations of the different technically shaped composite stiffened plates restrained by the boundary conditions were carried out to study the axial compressive failure mechanism of the stiffened plates formed by the secondary gluing and the co-curing process. In the axial compression test, the local buckling of the test piece through the strain gauge is monitored in real time, the initial acoustic load of the test piece is recorded in time, and the structural failure mechanism is analyzed through the cross section observation. The finite element model was built based on ABAQUS software to simulate the post-buckling damage progression to the destruction process. The calculated results are in good agreement with the experimental results. The results show that the process has no significant effect on the structural stability and load carrying capacity, while the stiffened plate configuration has a great effect. Polymethacrylimide (PMI) foam does not affect the structural buckling load and failure load, but it can delay the initial damage of structure. However, the interface damage of the co-cured stiffened plate appeared earlier and expanded slowly, showing better damage impedance characteristics.