| 物体变形测量的相移数字散斑剪切干涉术 |
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| 引用本文： | 顾国庆,王开福.物体变形测量的相移数字散斑剪切干涉术[J].四川激光,2011(4):16-17. |
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| 作者姓名： | 顾国庆 王开福 |
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| 作者单位： | 南京航空航天大学航空宇航学院,江苏南京210016 |
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| 基金项目： | 南京航空航天大学博士学位论文创新与创优基金（BCXJ11-01） |
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| 摘 要： | 相移数字散斑剪切干涉技术可以提高检测精度,利用该方法对圆形铝板试件进行测量。为了实现全场相位的精确求解,运用等四步相移Carré算法定量计算相位。将该非接触测量技术与弹性力学理论分析相结合,对四周固支,中心受集中载荷试件的离面位移导数进行测量与分析,另外采用有限元方法进行模拟。最后将实验结果分别和理论结果、有限元结果进...
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| 关 键 词： | 数字散斑剪切干涉 相移技术 Carré算法 变形 离面位移导数 有限元 |
Digital phase-shifting shearography for measurement of object deformation |
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| GU Guo-qing,WANG Kai-fu.Digital phase-shifting shearography for measurement of object deformation[J].Laser Journal,2011(4):16-17. |
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| Authors: | GU Guo-qing WANG Kai-fu |
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| Affiliation: | (College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China) |
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| Abstract: | Digital phase-shifting shearography technique is applied for the measurement of the standard circular aluminum specimen.In order to realize the calculation of the full-field phase image,the equal-four-step Carré algorithm is used for quantitative phase extraction in shearography.The small deformation of the specimen is detected by the non-destructive testing technique and demonstrated with theoretical analysis.FEM method is also applied to solve the model.At last,we find that it is efficiency for the accurate measurement by comparing the experimental values with the theoretical values and FEM results.It is shown that digital phase-shifting shearography technique play an important role in the field of industry witnessed inspections. |
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| Keywords: | digital shearography phase-shifting technique Carré algorithm deformation derivative of out-of-plane displacement FEM |
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