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Cross-sectional constants of composite blades using computed tomography technique and finite element analysis

Jung, Sung N. and Dhadwal, Manoj K. and Kim, Young Woo and Kim, Ju Hyuk and Riemenschneider, Johannes (2015) Cross-sectional constants of composite blades using computed tomography technique and finite element analysis. Composite Structures (129), pp. 132-142. Elsevier. doi: 10.1016/j.compstruct.2015.03.074. ISSN 0263-8223.

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Official URL: http://www.sciencedirect.com/science/article/pii/S0263822315002676


The structural properties of Higher-harmonic Aeroacoustic Rotor Test (HART) II blades are determined using a finite element (FE) based cross-section analysis combined with the X-ray computed tomography technique. Three-dimensional, high-resolution digital images are constructed for this purpose. The detailed cross-section geometries are identified from a section segmentation process so that each pixel of the image is characterized by different attenuation coefficients according to the distribution of materials. The segmented section profiles are used to produce graphic data interfaces to create FE section model. A cross-section analysis is performed to compute the structural properties of the blade. The predicted mass and inertia results exactly reflect the manufactured configuration of the blade yielding semi-empirical data set of the blade. The stiffness properties measured using a cantilevered condition are correlated with the present predictions and the earlier estimated values. Good correlation is obtained between the predicted results and the measured data while a substantial deviation is observed with the earlier estimations. The possible source of discrepancy is identified from the analysis. The sensitivity of manufacturing defects and modeling deficiencies on the structural properties is examined. It is demonstrated that the proposed analysis offers a practical alternative for structural properties in non-destructive way.

Item URL in elib:https://elib.dlr.de/96296/
Document Type:Article
Title:Cross-sectional constants of composite blades using computed tomography technique and finite element analysis
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Jung, Sung N.Konkuk UniversityUNSPECIFIED
Dhadwal, Manoj K.Konkuk UniversityUNSPECIFIED
Kim, Young WooKonkuk UniversityUNSPECIFIED
Kim, Ju HyukKonkuk UniversityUNSPECIFIED
Riemenschneider, JohannesInstitut für Faserverbundleichtbau und Adaptronik - AdaptronikUNSPECIFIED
Date:7 May 2015
Journal or Publication Title:Composite Structures
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 132-142
Keywords:Computed tomography; Digital image; Section Segmentation; Finite element model; Non-destructive technique
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Innovative Rotorcraft (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Stanitzek, Silke
Deposited On:17 Nov 2015 12:35
Last Modified:17 Nov 2015 12:35

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