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Structural health monitoring of composite laminates in thermoplastic induction welded joints using electromagnetic field technique.
- Source :
-
Sensors & Actuators A: Physical . Sep2024, Vol. 375, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- This research paper explores the assessment of electrical property changes resulting from damage in a Carbon Fiber Reinforced Polymers (CFRP) laminate and its thermoplastic induction-welded joints. Controlled variations in electrical conductivity and dielectric permittivity were achieved by incorporating square Polytetrafluoroethylene (PTFE) adhesive tapes into both CFRP laminates and the bondline interfaces of induction-welded components. Two elementary and effective sensors, capable of measuring magnetic (Purely Magnetic sensor) and electric fields (Hybrid sensor), were employed to detect these property changes induced by a sinusoidal magnetic field generated by a nearby coil. Both sensors exhibited remarkable sensitivity in identifying variations induced by the smallest artificial defects, measuring 2×2 mm in size. Furthermore, the PM sensor displayed a discernible signal trend corresponding to changes in defect size ranging from 4 to 225 mm square, as well as variations in position within the thickness of the CFRP laminate, extending to a depth of 1.7 mm. These findings underscore the potential of electromagnetic-based structural health monitoring (ESHM) techniques for monitoring the condition of a thermoplastic composite structure and its induction-welded joints. [Display omitted] • Controlled variations of electrical conductivity and dielectric permittivity by incorporating PTFE adhesive tapes • Two sensors capable of measuring defect induced magnetic and electric fields variations. • Both sensors shows discernible signal trend corresponding to changes in defect size. • A potentially effective electromagnetically based SHM method for monitoring defects in CFRTP laminates is presented. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09244247
- Volume :
- 375
- Database :
- Academic Search Index
- Journal :
- Sensors & Actuators A: Physical
- Publication Type :
- Academic Journal
- Accession number :
- 177851297
- Full Text :
- https://doi.org/10.1016/j.sna.2024.115540