Experimental study on compressive buckling behavior of J-stiffened composite panels
Experimental study on compressive buckling behavior of J-stiffened composite panels
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J型加筋复合材料板压缩屈曲行为试验研究
DOI：
10.1016/j.optlaseng.2019.02.014
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发表时间：
2019-09-01
影响因子：
4.6
通讯作者：
Yan, Cheng
中科院分区：
文献类型：
--
作者：
Liu, Da;Bai, Ruixiang;Yan, Cheng
条纹投影概要仪用于研究由J形肋骨僵硬的复合面板的压缩屈曲行为。引入了动态四步相位转移技术和流苏投影辅助学中的多频解解码方法的基本原理。这些技术用于监测平面内压缩下复合面板的形态变化。同时，利用应变测量值监测面板表面上每个点的应变病史。光学测量显示了不同时刻的全场屈曲挠度和屈曲模式，并且比应变计产生的数据更丰富。实验结果表明，局部屈曲会随着载荷而增加，直到肋骨不稳定为止，这通过有限元计算得到了验证。
Fringe projection profilometry was used to study compressive buckling behavior of composite panels stiffened by J-shaped ribs. The basic principles of dynamic four-step phase shifting technique and multi-frequency unwrapping method in the fringe projection profilometry are introduced. These techniques were used to monitor the morphological changes of the composite panel under in-plane compression. At the same time, strain gauges were utilized to monitor strain history at each point on the surface of the panel. Optical measurement shows the full-field buckling deflection and buckling mode at different moments, and it produces richer data than strain gauges. The experimental results show that the local buckling increases with the loading until the ribs are unstable, which is verified by the finite element calculations.