{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,2]],"date-time":"2026-06-02T10:26:20Z","timestamp":1780395980139,"version":"3.54.1"},"reference-count":49,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2024,5,27]],"date-time":"2024-05-27T00:00:00Z","timestamp":1716768000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"ARC LIEF: Australasian facility for the automated fabrication of high-performance bespoke components","award":["LE140100082"],"award-info":[{"award-number":["LE140100082"]}]},{"name":"ARC LIEF: Australasian facility for the automated fabrication of high-performance bespoke components","award":["IC160100040"],"award-info":[{"award-number":["IC160100040"]}]},{"name":"ARC ITTC: ARC Training Centre for Automated Manufacture of Advanced Composites","award":["LE140100082"],"award-info":[{"award-number":["LE140100082"]}]},{"name":"ARC ITTC: ARC Training Centre for Automated Manufacture of Advanced Composites","award":["IC160100040"],"award-info":[{"award-number":["IC160100040"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The time difference of arrival (TDOA) method has traditionally proven effective for locating acoustic emission (AE) sources and detecting structural defects. Nevertheless, its applicability is constrained when applied to anisotropic materials, particularly in the context of fiber-reinforced composite structures. In response, this paper introduces a novel COmposite LOcalization using Response Surface (COLORS) algorithm based on a two-step approach for precise AE source localization suitable for laminated composite structures. Leveraging a response surface developed from critical parameters, including AE velocity profiles, attenuation rates, distances, and orientations, the proposed method offers precise AE source predictions. The incorporation of updated velocity data into the algorithm yields superior localization accuracy compared to the conventional TDOA approach relying on the theoretical AE propagation velocity. The mean absolute error (MAE) for COLORS and TDOA were found to be 6.97 mm and 8.69 mm, respectively. Similarly, the root mean square error (RMSE) for COLORS and TODA methods were found to be 9.24 mm and 12.06 mm, respectively, indicating better performance of the COLORS algorithm in the context of source location accuracy. The finding underscores the significance of AE signal attenuation in minimizing AE wave velocity discrepancies and enhancing AE localization precision. The outcome of this investigation represents a substantial advancement in AE localization within laminated composite structures, holding potential implications for improved damage detection and structural health monitoring of composite structures.<\/jats:p>","DOI":"10.3390\/s24113450","type":"journal-article","created":{"date-parts":[[2024,5,27]],"date-time":"2024-05-27T09:33:31Z","timestamp":1716802411000},"page":"3450","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Novel Response Surface Technique for Composite Structure Localization Using Variable Acoustic Emission Velocity"],"prefix":"10.3390","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4046-2379","authenticated-orcid":false,"given":"Binayak","family":"Bhandari","sequence":"first","affiliation":[{"name":"School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Phyo Thu","family":"Maung","sequence":"additional","affiliation":[{"name":"School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6446-0124","authenticated-orcid":false,"given":"Gangadhara B.","family":"Prusty","sequence":"additional","affiliation":[{"name":"School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia"},{"name":"Australian Composite Manufacturing CRC Ltd., Sydney, NSW 2052, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,5,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Shokrieh, M.M., and Mohammadi, A.R.G. (2021). Nondestructive Testing (Ndt) Techniques in the Measurement of Residual Stresses in Composite Materials: An Overview, Woodhead Publishing.","DOI":"10.1016\/B978-0-12-818817-0.00016-0"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Mevissen, F., and Michele, M. (2019). A Review of Ndt\/Structural Health Monitoring Techniques for Hot Gas Components in Gas Turbines. Sensors, 19.","DOI":"10.3390\/s19030711"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"3732","DOI":"10.1016\/j.matpr.2020.11.578","article-title":"Non-Destructive Testing (Ndt) Techniques for Low Carbon Steel Welded Joints: A Review and Experimental Study","volume":"44","author":"Deepak","year":"2021","journal-title":"Mater. Today Proc."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"107146","DOI":"10.1016\/j.ymssp.2020.107146","article-title":"An Overview of Acoustic Emission Inspection and Monitoring Technology in the Key Components of Renewable Energy Systems","volume":"148","author":"He","year":"2021","journal-title":"Mech. Syst. Signal Process."},{"key":"ref_5","unstructured":"(2013). Acoustic Emission Non-Destructive Testing of Structures Using Source Location Techniques (Standard No. TN 37831)."},{"key":"ref_6","unstructured":"Miller, R.K., Hill, E.K., Moore, P.O., and American Society for Nondestructive Testing (2005). Acoustic Emission Testing, American Society for Nondestructive Testing."},{"key":"ref_7","unstructured":"Rindorf, H.J. (1981). Acoustic Emission Source Location in Theory and in Practice, Br\u00fcel & Kj\u00e6r."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"1512","DOI":"10.1016\/j.ymssp.2006.05.003","article-title":"Delta T Source Location for Acoustic Emission","volume":"21","author":"Pullin","year":"2007","journal-title":"Mech. Syst. Signal Process."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"483","DOI":"10.1016\/j.ymssp.2019.01.021","article-title":"Acoustic Emission Bayesian Source Location: Onset Time Challenge","volume":"123","author":"Ramin","year":"2019","journal-title":"Mech. Syst. Signal Process."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"7472","DOI":"10.1038\/s41598-017-07371-w","article-title":"Experimental Study on the Location of an Acoustic Emission Source Considering Refraction in Different Media","volume":"7","author":"Zhou","year":"2017","journal-title":"Sci. Rep."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"101075","DOI":"10.1016\/j.coco.2022.101075","article-title":"Damage Evolution Behavior of Cold Plasma Treated Glass Fiber\/Vinyl Ester Resin Composites under Bending Load by Acoustic Emission","volume":"30","author":"Ruosi","year":"2022","journal-title":"Compos. Commun."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"101213","DOI":"10.1016\/j.coco.2022.101213","article-title":"Structure Health Monitoring of Composites Joint Reinforced by Acoustic Emission Based Smart Composite Fasteners","volume":"33","author":"Li","year":"2022","journal-title":"Compos. Commun."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"45","DOI":"10.1016\/j.ndteint.2004.06.005","article-title":"Application of Acoustic Emission to Study Creep Behaviour of Composite Bonded Lap Shear Joints","volume":"38","year":"2005","journal-title":"NDT E Int."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"107254","DOI":"10.1016\/j.ymssp.2020.107254","article-title":"Crack Detection and Localization in a Fluid Pipeline Based on Acoustic Emission Signals","volume":"150","author":"Bui","year":"2021","journal-title":"Mech. Syst. Signal Process."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"110216","DOI":"10.1016\/j.ymssp.2023.110216","article-title":"A Transfer Learning Approach for Acoustic Emission Zonal Localization on Steel Plate-Like Structure Using Numerical Simulation and Unsupervised Domain Adaptation","volume":"192","author":"Li","year":"2023","journal-title":"Mech. Syst. Signal Process."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"2063","DOI":"10.1177\/1475921720915625","article-title":"Evaluation of Acoustic Emission Source Localization Accuracy in Concrete Structures","volume":"19","author":"Fengqiao","year":"2020","journal-title":"Struct. Health Monit."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"119086","DOI":"10.1016\/j.conbuildmat.2020.119086","article-title":"Acoustic Emission Propagation Characteristics and Damage Source Localization of Asphalt Mixtures","volume":"252","author":"Xin","year":"2020","journal-title":"Constr. Build. Mater."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"108207","DOI":"10.1016\/j.apacoust.2021.108207","article-title":"Defect Localization on Rolling Element Bearing Stationary Outer Race with Acoustic Emission Technology","volume":"182","author":"Linjiang","year":"2021","journal-title":"Appl. Acoust."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"248","DOI":"10.1016\/j.ymssp.2019.04.050","article-title":"A Generalizable Deep Learning Framework for Localizing and Characterizing Acoustic Emission Sources in Riveted Metallic Panels","volume":"130","author":"Arvin","year":"2019","journal-title":"Mech. Syst. Signal Process."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"856","DOI":"10.1016\/j.compositesa.2012.01.023","article-title":"Acoustic Emission Source Location in Composite Materials Using Delta T Mapping","volume":"43","author":"Eaton","year":"2012","journal-title":"Compos. Part A Appl. Sci. Manuf."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"179","DOI":"10.1016\/j.compositesb.2018.09.071","article-title":"Damage-Induced Acoustic Emission Source Monitoring in a Honeycomb Sandwich Composite Structure","volume":"158","author":"Shirsendu","year":"2019","journal-title":"Compos. Part B Eng."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"271","DOI":"10.1016\/j.ultras.2014.08.009","article-title":"A Two-Step Hybrid Technique for Accurately Localizing Acoustic Source in Anisotropic Structures without Knowing Their Material Properties","volume":"56","author":"Kundu","year":"2015","journal-title":"Ultrasonics"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"111992","DOI":"10.1016\/j.compstruct.2020.111992","article-title":"Linear Damage Localization in Cfrp Laminates Using One Single Fiber-Optic Bragg Grating Acoustic Emission Sensor","volume":"238","author":"Fengming","year":"2020","journal-title":"Compos. Struct."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"124","DOI":"10.1016\/j.compositesb.2017.05.019","article-title":"Real-Time Detection of Low-Velocity Impact-Induced Delamination Onset in Composite Laminates for Efficient Management of Structural Health","volume":"123","author":"Kim","year":"2017","journal-title":"Compos. Part B Eng."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"522","DOI":"10.1016\/j.compstruct.2019.01.028","article-title":"Impact Localization of Composite Stiffened Panel with Triangulation Method Using Normalized Magnitudes of Fiber Optic Sensor Signals","volume":"211","author":"Jang","year":"2019","journal-title":"Compos. Struct."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"3891","DOI":"10.1016\/j.asej.2021.03.024","article-title":"Corrosion Detection and Severity Level Prediction Using Acoustic Emission and Machine Learning Based Approach","volume":"12","author":"Fahad","year":"2021","journal-title":"Ain Shams Eng. J."},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Zazilah, M., Alam, M.K., Nayan, N.A., Rahman, N.A.A., and Mahmud, M.S. (2021). Acoustic Emission Corrosion Feature Extraction and Severity Prediction Using Hybrid Wavelet Packet Transform and Linear Support Vector Classifier. PLoS ONE, 16.","DOI":"10.1371\/journal.pone.0261040"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"113717","DOI":"10.1016\/j.engstruct.2021.113717","article-title":"A Novel Acoustic Emission Source Location Method for Crack Monitoring of Orthotropic Steel Plates","volume":"253","author":"Li","year":"2022","journal-title":"Eng. Struct."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"109450","DOI":"10.1016\/j.compositesb.2021.109450","article-title":"Acoustic Emission Data Based Deep Learning Approach for Classification and Detection of Damage-Sources in a Composite Panel","volume":"228","author":"Shirsendu","year":"2022","journal-title":"Compos. Part B Eng."},{"key":"ref_30","first-page":"1","article-title":"Continuous Wavelet Transform and Deep Learning for Accurate Ae Zone Detection in Laminated Composite Structures","volume":"99","author":"Bhandari","year":"2024","journal-title":"IEEE Sens."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"679","DOI":"10.1007\/s11340-020-00591-8","article-title":"Acoustic Emission Source Localization with Generalized Regression Neural Network Based on Time Difference Mapping Method","volume":"60","author":"Liu","year":"2020","journal-title":"Exp. Mech."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"044010","DOI":"10.1088\/1361-6501\/acb002","article-title":"Acoustic Emission Source Localisation for Structural Health Monitoring of Rail Sections Based on a Deep Learning Approach","volume":"34","author":"Harsh","year":"2023","journal-title":"Meas. Sci. Technol."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"25","DOI":"10.1016\/j.ultras.2013.06.009","article-title":"Acoustic Source Localization","volume":"54","author":"Kundu","year":"2014","journal-title":"Ultrasonics"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"331","DOI":"10.4028\/www.scientific.net\/KEM.558.331","article-title":"Locating Point of Impact on an Anisotropic Cylindrical Surface Using Acoustic Beamforming Technique","volume":"558","author":"Hayato","year":"2013","journal-title":"Key Eng. Mater."},{"key":"ref_35","first-page":"8345","article-title":"Impact Localization on a Cylindrical Plate by near-Field Beamforming Analysis","volume":"25","author":"Nakatani","year":"2012","journal-title":"Proc. SPIE"},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"740","DOI":"10.1016\/j.ultras.2012.01.017","article-title":"Acoustic Source Localization in Anisotropic Plates","volume":"52","author":"Tribikram","year":"2012","journal-title":"Ultrasonics"},{"key":"ref_37","unstructured":"Kundu, T. (2012, January 3\u20136). A New Technique for Acoustic Source Localization in an Anisotropic Plate without Knowing Its Material Properties. Proceedings of the 6th European Workshop on Structural Health Monitoring, Dreaswn, Germany."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"107020","DOI":"10.1016\/j.ultras.2023.107020","article-title":"Acoustic Source Localization Using L-Shaped Sensor Clusters: A Review","volume":"132","author":"Ma","year":"2023","journal-title":"Ultrasonics"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"86","DOI":"10.1016\/j.ultras.2015.01.016","article-title":"Influence of Attenuation on Acoustic Emission Signals in Carbon Fiber Reinforced Polymer Panels","volume":"59","author":"Asamene","year":"2015","journal-title":"Ultrasonics"},{"key":"ref_40","doi-asserted-by":"crossref","unstructured":"Li, D., Yang, K., He, Z., Zhou, H., and Li, J. (2020). Acoustic Emission Wave Velocity Attenuation of Concrete and Its Application in Crack Localization. Sustainability, 12.","DOI":"10.3390\/su12187405"},{"key":"ref_41","unstructured":"Benmedakhene, S., and Laksimi, A. (2001, January 25\u201329). Propagation Study of Acoustic Emission Waves in Composite Materials. Proceedings of the International Conference on Composite Materials, Beijing, China."},{"key":"ref_42","unstructured":"Physical Acoustics (2023, April 13). Micro-Ii Compact Pci Ae Chassis. Available online: https:\/\/www.physicalacoustics.com\/by-product\/micro-ii\/."},{"key":"ref_43","unstructured":"(2023, April 13). R6a-60khz General Purpose Ae Sensor. Available online: https:\/\/www.physicalacoustics.com\/content\/literature\/sensors\/Model_R6a.pdf."},{"key":"ref_44","unstructured":"(2023, April 13). Aewin-Real-Time Data Acquisition and Replay Software. Available online: https:\/\/www.physicalacoustics.com\/content\/literature\/software\/AEwin_Software_Bulletin.pdf."},{"key":"ref_45","first-page":"60","article-title":"Characterization and Calibration of Acoustic Emission Sensors","volume":"39","author":"Hsu","year":"1981","journal-title":"Mater. Eval."},{"key":"ref_46","first-page":"184","article-title":"Investigation of Pencil-Lead Breaks as Acoustic Emission Sources","volume":"29","author":"Sause","year":"2011","journal-title":"J. Acoust. Emiss."},{"key":"ref_47","unstructured":"(2007). Pci-2 Based System. User\u2019s Manual, Mistras Group Inc."},{"key":"ref_48","first-page":"109","article-title":"Attenuation of Lamb Waves in Cfrp Plates","volume":"30","author":"Kanji","year":"2012","journal-title":"J. Acoust. Emiss."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"113231","DOI":"10.1016\/j.compstruct.2020.113231","article-title":"On the Determination of Acoustic Emission Wave Propagation Velocity in Composite Sandwich Structures","volume":"259","author":"Wu","year":"2021","journal-title":"Compos. Struct."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/24\/11\/3450\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T14:48:50Z","timestamp":1760107730000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/24\/11\/3450"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,5,27]]},"references-count":49,"journal-issue":{"issue":"11","published-online":{"date-parts":[[2024,6]]}},"alternative-id":["s24113450"],"URL":"https:\/\/doi.org\/10.3390\/s24113450","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2024,5,27]]}}}