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论文类型：期刊论文

发表时间：2022-06-29

发表刊物：复合材料学报

所属单位：运载工程与力学学部

卷号：28

期号：1

页面范围：199-205

ISSN号：1000-3851

摘要：Based on infrared lock-in thermography technology, the nondestructive
   testing of composite grid stiffened structures with typical defects was
   carried out. The result was also analyzed using infrared lock-in
   thermography system developed by Cedip in France. The effects of loading
   frequency and output voltage offset to the testing result were
   discussed. The result shows that there are more information of phase
   figures than that of amplitude figures. Different frequencies will lead
   to different results and the loading frequency is the key to the
   success. Increasing the output voltage offset will make a useful
   contribution for better testing. This method is feasible to inspect the
   unknown defect of composite materials

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