Monitoring crack propagation in skin-stringer elements using carbon nanotube doped adhesive films: Influence of defects and manufacturing process
Source abstract
Abstract
Standard Mode-I and skin-stringer sub-elements were manufactured using novel adhesive films reinforced with carbon nanotubes. Peeling tests were conducted to analyse the different crack propagation mechanisms. In this context, the influence of manufacturing methods and artificial defects is deeply explored. It was observed that the electrical resistance increased with crack length due to a breakage of electrical pathways, depending on manufacturing and induced defects. Co-bonded specimens showed a more stable behaviour due to a better interface between the adhesive and substrate than joints manufactured by secondary bonding. Moreover, by analysing the influence of artificial defects, it was observed that larger discontinuities induced more unstable electromechanical behaviours as there is a more prevalent breakage of electrical pathways. In this regard, samples with Teflon inserts showed sharper increases of electrical resistance than those previously treated with a liquid agent simulating a kissing bond. Therefore, the proposed technique shows a high potential and applicability for Structural Health Monitoring (SHM) of integrated composite structures.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Carbon Nanotubes in Composites · Smart Materials for Construction · Advanced Sensor and Energy Harvesting Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (36)
Show source-provided references
1. Hussey · 1996
2. A simple surface treatment and characterization of AA 6061 aluminum alloy surface for adhesive bonding applications10.1016/j.apsusc.2012.08.091 ↗
3. Surface treatment of CFRP: influence on single lap joint performances10.1016/j.ijadhadh.2018.06.008 ↗
4. Curing-induced debonding and its influence on strength of adhesively bonded joints of dissimilar materials10.1115/1.4032081 ↗
5. Experimental investigation of the effects of adhesive defects on the single lap joint strength10.1016/j.ijadhadh.2017.08.005 ↗
6. Monitoring of fatigue crack growth in composite adhesively bonded joints using fiber Bragg gratings10.1016/j.proeng.2011.04.037 ↗
7. Structural health monitoring of bonded composite repairs - a critical comparison between ultrasonic Lamb wave approach and surface mounted crack sensor approach10.1016/j.compositesb.2012.11.002 ↗
8. Analysis of acoustic emission propagation in metal-to-metal adhesively bonded joints10.1007/s10921-018-0488-y ↗
9. Interaction of Lamb waves on bonded composite plates with defects10.1016/j.compstruct.2006.01.003 ↗
10. Numerical and experimental damage identification in metal-composite bonded joint10.1080/00218464.2014.977436 ↗
11. Low cost technique for detecting adhesive debonding damage of glass epoxy composite plate using an impedance based non-destructive testing method10.1016/j.compstruct.2018.01.053 ↗
12. Mechanical and thermal properties of carbon nanotubes10.1016/0008-6223(95)00021-5 ↗
13. Carbon nanotubes: present and future commercial applications10.1126/science.1222453 ↗
14. Conductivity scaling in supercritical percolation of nanoparticles–not a power law10.1039/C4NR06809B ↗
15. Polymer nanocomposites: insights on rheology, percolation and molecular mobility10.1016/j.polymer.2018.07.079 ↗
16. A multi-scale modeling approach for simulating crack sensing in polymer fibrous composites using electrically conductive carbon nanotube networks. Part I: micro-scale analysis10.1016/j.commatsci.2018.07.048 ↗
17. Piezoresistive strain sensors made from carbon nanotubes based polymer nanocomposites10.3390/s111110691 ↗
18. Piezoresistive performance characterization of strain sensitive multi-walled carbon nanotube-epoxy nanocomposites10.1016/j.sna.2016.12.011 ↗
19. Strain and damage-sensing performance of biocompatible smart CNT/UHMWPE nanocomposites10.1016/j.msec.2018.07.029 ↗
20. Critical parameters of carbon nanotube reinforced composites for structural health monitoring applications: empirical results versus theoretical predictions10.1016/j.compscitech.2018.12.010 ↗
21. Smart-fabric sensor composed of single-walled carbon nanotubes containing binary polymer composites for health monitoring10.1016/j.compscitech.2018.05.012 ↗
22. A bioinspired multilayer assembled microcrack architecture nanocomposite for highly sensitive strain sensing10.1016/j.compscitech.2018.05.029 ↗
23. In situ self-sensing of delamination initiation and growth in multi-directional laminates using carbon nanotube interleaves10.1016/j.compscitech.2018.07.044 ↗
24. Health monitoring of scarfed CFRP joints under cyclic loading via electrical resistance measurements using carbon nanotube modified adhesive films10.1016/j.compositesa.2017.11.015 ↗
25. Impedance analysis for condition monitoring of single lap CNT-epoxy adhesive joint10.1016/j.ijadhadh.2018.11.003 ↗
26. Damage sensing of adhesively-bonded hybrid composite/steel joints using carbon nanotubes10.1016/j.compscitech.2010.10.009 ↗
27. Fatigue life evaluation and crack detection of the adhesive joint with carbon nanotubes10.1016/j.compstruct.2013.09.046 ↗
28. Mode-I adhesive fracture energy of carbon fibre composite joints with nanoreinforced epoxy adhesives10.1016/j.ijadhadh.2011.06.016 ↗
29. On the mechanical characterization of carbon nanotube reinforced epoxy adhesives10.1016/j.matdes.2014.02.034 ↗
30. Research on strength of nanocomposite adhesively bonded composite joints10.1016/j.compositesb.2017.06.016 ↗
31. Carbon nanotubes for assessing the structural integrity of composite bonded joints with film adhesives
32. Carbon nanotube doped adhesive films for detecting crack propagation on bonded joints: a deeper understanding of anomalous behaviors10.1021/acsami.7b16036 ↗
33. Development of bonded joints using novel CNT doped adhesive films: mechanical and electrical properties10.1016/j.ijadhadh.2018.09.001 ↗
34. Exploring the mechanical and sensing capabilities of multi-material bonded joints with carbon nanotube-doped adhesive films10.1016/j.compstruct.2019.111477 ↗
35. An approach using highly sensitive carbon nanotube adhesive films for crack growth detection under flexural load in composite structures10.1016/j.compstruct.2019.111087 ↗
36. Fracture behavior and crack sensing capability of bonded carbon fiber composite joints with carbon nanotube-based polymer adhesive layer under Mode I loading10.1016/j.compscitech.2017.04.014 ↗