Received June 18, 2020, accepted June 18, 2020, date of current version July 1, 2020. Digital Object Identifier 10.1109/ACCESS.2020.3004011
COMMENTS AND CORRECTIONS
Corrections to ‘‘Transverse Damage Localization and Quantitative Size Estimation for Composite Laminates Based on Lamb Waves’’ M. SAQIB HAMEED AND ZHENG LI State Key Laboratory for Turbulence and Complex Systems, Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing 100871, China
Corresponding author: Zheng Li (lizheng@pku.edu.cn) This work was supported by the National Natural Science Foundation of China under Grant 11521202.
In the above article [1], the proposed Methods, Results, and Conclusions remain unchanged. In Section II, Subsection B and Subsubsection 2), the second last paragraph says, ‘‘The maximum distance between any two damage edge points represents the length of semi-major axis, a, while, the minimum distance between any two edge points represents the length of semi-minor axis, b, of an ellipse, as follows.’’ Based on this statement, the two equations presented afterward should not have 2 in the denominator. The correct equations should be read as, q 2 2 a = max xei − xej + yei − yej q 2 2 b = min xei − xej + yei − yej Some of the reference numbers were not updated in the main body of the paper when additional papers were cited in the revised manuscript. There is no change in the References list or body text, only the reference numbers in the text are corrected as follows: Start of the third paragraph of Section I with the correct referencing should be read as, ‘‘In the aforementioned methods, the researchers mostly simulated the defects using circular [3], [4], [10], [11], [14], [15], [19], [25], [27]–[29], square [13], [30], and rectangular [16], [18], [24] shapes, which may not be the best representation of the actual damage in composite laminates. Studies performed at the
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microscopic level reveal that the more realistic representation of damage is the thin and elongated ellipse-like shape [31], which has been used to simulate the damage in composite laminates [32]–[35].’’ The last line of the same paragraph should be read as, ‘‘Furthermore, most of the existing elliptical reconstruction methods are image-based which focus only on damage localization [4], [10]–[15], [19], [24]–[28], [30], [36] and do not provide the quantitative estimation of damage size/extent.’’ The third last line of first paragraph of Section II should be read as, ‘‘Consequently, the Lamb wave signals reflect from the outer periphery of the damage, and the ellipses remain externally tangent to the damage boundary [18], [37], [38], as shown in Figure 2(b).’’ The references in the last two lines of Section III should be read as, ‘‘Furthermore, in different composite layups and along all other propagation directions, the dispersion curves of Lamb waves have the similar property [2], [43]. Therefore, the scattered S0 mode as the one propagating faster [44], [45], was exclusively considered for the proposed method.’’ REFERENCES [1] M. S. Hameed and Z. Li, ‘‘Transverse damage localization and quantitative size estimation for composite laminates based on Lamb waves,’’ IEEE Access, vol. 7, pp. 174859–174872, 2019.
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VOLUME 8, 2020