Real-time detection of low-velocity impact-induced delamination onset in composite laminates for efficient management of structural health

Cited 6 time in webofscience Cited 0 time in scopus
  • Hit : 149
  • Download : 0
Carbon fiber reinforced polymer (CFRP) laminates have been becoming primary structures in the aerospace industry because of their high specific strength and stiffness. However, CFRP laminates have susceptibility to low-velocity impact events which can easily induce internal or hidden damages such as delamination. Such impacts frequently arise during maintenance, flight operation or in-service events. Thus, composite structures have to be irregularly inspected in addition to the periodic maintenance for ensuring the structural health. However, such irregular inspections can inherently incur the overall maintenance cost because it has to be performed in all suspicious cases of damages. For this reason, the methodology for accurately realizing the onset of delamination induced by low-velocity impact events is required for reducing the operating cost of composite structures. In this paper, the potential of using high speed fiber Bragg grating (FBG) sensing system for detecting the delamination onset was studied for thick CFRP laminates. Because FBG sensors can be simply multiplexed to capture the structural responses, the proposed method in this study can be quite attractive for an efficient impact monitoring system. To obtain the impact response signals and contact force histories, several low-velocity impact experiments were performed in a range of 1-30 J. From the signal processing of these experimental data, the meaningful damage index was introduced using the detail components of wavelet transformed sensor signals. Although this result is in the preliminary step, such damage index can be useful for applying an in-situ impact damage assessment system to the real composite structures in the near future. (C) 2017 Elsevier Ltd. All rights reserved.
Publisher
ELSEVIER SCI LTD
Issue Date
2017-08
Language
English
Article Type
Article
Keywords

WAVE-NUMBER ANALYSIS; DAMAGE DETECTION; NONDESTRUCTIVE EVALUATION; ACOUSTIC-EMISSION; PART I; SENSOR; PERFORMANCE; CFRP; QUANTIFICATION; IDENTIFICATION

Citation

COMPOSITES PART B-ENGINEERING, v.123, pp.124 - 135

ISSN
1359-8368
DOI
10.1016/j.compositesb.2017.05.019
URI
http://hdl.handle.net/10203/226135
Appears in Collection
AE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 6 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0