Application of Ultrasonic Coda Wave Interferometry for Micro-cracks Monitoring in Woven Fabric Composites
Article dans une revue avec comité de lecture
Author

24541 Georgia Tech Lorraine [Metz]
178323 Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]

216445 George W. Woodruff School of Mechanical Engineering
24541 Georgia Tech Lorraine [Metz]

24541 Georgia Tech Lorraine [Metz]
82338 School of Electrical and Computer Engineering - Georgia Insitute of Technology [ECE GeorgiaTech]

24541 Georgia Tech Lorraine [Metz]
82338 School of Electrical and Computer Engineering - Georgia Insitute of Technology [ECE GeorgiaTech]
Date
2019Journal
Journal of Nondestructive EvaluationAbstract
The consequences of a four-point bending test, up to 12 mm, are examined by emitting 1 MHz ultrasonic guided waves in woven carbon fiber reinforced polymer specimens, using coda wave interferometry (CWI), revealing a potential use for nondestructive evaluation. It is known that CWI is more sensitive to realistic damage than the conventional method based on the first arriving time of flight in geophysical, or in civil engineering applications such as concrete structures. However, in composite materials CWI is not well established because of the involved structural complexity. In this paper, CWI is investigated for monitoring the occurrence of realistic defects such as micro-cracks in a woven carbon fiber composite plate. The micro-cracks are generated by a four-point bending test. The damage state is stepwise enhanced by gradually increasing the load level, until failure initiation. The damage is monitored, after each loading, using ultrasound. It is demonstrated that CWI is a powerful tool to detect damage, even low levels, in the sample. Two damage indicators based on CWI, i.e. signals correlation coefficient and relative velocity change, are investigated and appear to be complimentary. Under significant loading levels, the normalized cross-correlation coefficient between the waveforms recorded in the damaged and in the healthy sample (reference at 0 mm), decreases sharply; this first indicator is therefore useful for severe damage detection. It is also demonstrated, by means of a second indicator, that the relative velocity change between a baseline signal taken at zero loading, and the signals taken at various loadings, is linear as a function of the loading, until a critical level is reached; therefore this second indicator, is useful for low damage level detection. The obtained evolution of the relative velocity measurement is supported by relative comparison to the evolution of the bending modulus in function of displacement. The relative velocity change exhibits the same evolution as the bending modulus with loading. It could be used to indicate when the material stiffness has decreased significantly. The research is done in the framework of composite manufacturing quality control and appears to be a promising inspection technique.
Files in this item
Related items
Showing items related by title, author, creator and subject.
-
Article dans une revue avec comité de lectureDONG, Junliang; POMARÈDE, Pascal; CHEHAMI, Lynda; LOCQUET, Alexandre; MERAGHNI, Fodil; DECLERCQ, Nico F.; CITRIN, D.S. (Elsevier, 2018)Polarization-sensitive terahertz imaging is applied to characterize subsurface damage in woven carbon fiber-reinforced composite laminates in this study. Terahertz subsurface spectral imaging based on terahertz deconvolution ...
-
Article dans une revue avec comité de lectureMIQOI, Nada; POMAREDE, Pascal; MERAGHNI, Fodil; DECLERCQ, Nico Felicien; GUILLAUMAT, Laurent; LE COZ, Gael; DELALANDE, Stéphane (SAGE Publications, 2020)The present experimental work investigates the response of woven glass fabric reinforced polyamide 6.6/6 subjected to drop weight impact loading. The main objective is the development and the introduction of a new experimental ...
-
Conférence invitéePOMAREDE, Pascal; MERAGHNI, Fodil; DELALANDE, Stéphane; DECLERCQ, Nico Felicien (2017)Un composite polyamide 66/6 renforcé par un tissu à armature sergée de 2,2 en fibres de verres a été étudié par une méthode ultrasonore avancée. Les mécanismes d’endommagement de ce type de matériau dépendent de la nature ...
-
Conférence invitéeECKEL, Sebastian; MERAGHNI, Fodil; POMAREDE, Pascal; DECLERCQ, Nico Felicien (2016)The presented experimental work describes the nondestructive examination of polymer based composites using an acoustic method under the consideration of nonlinear effects. The technique is based on the fact that material ...
-
Article dans une revue avec comité de lecturePOMAREDE, Pascal; MERAGHNI, Fodil; PELTIER, Laurent; DELALANDE, Stéphane; DECLERCQ, Nico Felicien (Springer Verlag, 2018)The paper proposes a new experimental methodology, based on ultrasonic measurements, that aims at evaluating the anisotropic damage in woven semi-crystalline polymer composites through new damage indicators. Due to their ...