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所属单位：航空学院

发表刊物：NDT E Int

摘要：In this paper, a new method, Moment-Stiffness Method (MSM), is proposed for measuring the edge and depth of internal defects which can be applied to any structures with known stiffness. MSM is based on the relation of the differences of displacements between flawed and flawless areas caused by the change of stiffness. Theoretical, numerical and experimental results are presented. In the method, digital speckle pattern interferometry (DSPI) is used to measure the out-of-plane displacement of a plate with an internal defect. In the detection of the first specimen, the distributions of first- and second-order radial derivatives of the out-of-plane displacement are obtained by the radial numerical differential. Then the full edge and depth of the defect is accurately determined using MSM. All the results indicate that the proposed method is an effective tool to measure internal defects precisely. © 2018 Elsevier Ltd

ISSN号：0963-8695

是否译文：否

发表时间：2019-03-01

合写作者：Lv, Congcong,Gu, Guoqing,Pan, Yun

通讯作者：王开福