Optical measurement on dynamic buckling behavior of stiffened composite panels under in-plane shear

Optical measurement on dynamic buckling behavior of stiffened composite panels under in-plane shear
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面内剪切下加筋复合材料板动态屈曲行为的光学测量

DOI:
10.1016/j.optlaseng.2016.04.017
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发表时间:
2016-12
影响因子:
4.6
通讯作者:
Leng Ruijiao
Leng Ruijiao
中科院分区:
工程技术2区
文献类型:
--
作者:
Lei Zhenkun;Bai Ruixiang;Tao Wang;Wei Xiao;Leng Ruijiao

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采用数字条纹投影轮廓术研究了面内剪切作用下i形筋加筋复合材料板的屈曲行为和破坏模式。介绍了非线性误差补偿的动态移相技术、多频解相技术和反相技术的基本原理。采用多频条纹投影轮廓法对加筋复合材料板面内剪切过程中不连续表面形貌的变化进行了监测和测量。同时,利用应变玫瑰花获取皮肤上多个点的应变历史。分析了板在不同时刻的屈曲模式和挠度,并与有限元法计算结果进行了比较。实验结果验证了有限元分析的正确性。
The buckling behavior and failure mode of a composite panel stiffened by I-shaped stringers under in-plane shear is studied using digital fringe projection profilometry. The basic principles of the dynamic phase-shifting technique, multi-frequency phase-unwrapping technique and inverse-phase technique for nonlinear error compensation are introduced. Multi-frequency fringe projection profilometry was used to monitor and measure the change in the morphology of a discontinuous surface of the stiffened composite panel during in-plane shearing. Meanwhile, the strain history of multiple points on the skin was obtained using strain rosettes. The buckling mode and deflection of the panel at different moments were analyzed and compared with those obtained using the finite element method. The experimental results validated the FEM analysis.
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