Concurrent use of Z-pins for crack arrest and structural health monitoring in adhesive-bonded composite lap joints
Source abstract
Abstract
Abstract Adhesive-bonded joints in carbon fibre-reinforced polymer laminates are cost effective, but their fatigue cracking potential currently limits aerospace certification. We investigated the concurrent use of Z-pins for crack arrest (including an analysis of underlying mechanisms) and structural health monitoring (SHM) in adhesive-bonded composite lap joints. The use of Z-pins resulted in a crack arrest capacity 33% higher than the joint's static limit load and produced a residual strength that far exceeded current ultimate loads (250 versus 150% of the limit load). The electrical resistance in the Z-pins was consistent with observed trends in crack growth, suggesting its viability for SHM.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Mechanical Behavior of Composites · Smart Materials for Construction · Fire effects on concrete materials
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References (24)
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1. US Department of Transportation-Federal Aviation Administration (USDOT-FAA) · 2009
2. Cyclic-fatigue crack growth in composite and adhesively-bonded structures: the FAA slow crack growth approach to certification and the problem of similitude10.1016/j.ijfatigue.2016.03.008 ↗
3. Fatigue behaviour and damage tolerant design of composite bonded joints for aerospace application
4. New crack stop hole shape using structural optimizing technique10.1016/j.asej.2015.02.010 ↗
5. Crack-growth arrest by redirecting crack growth by drilling stop holes and inserting pins into them10.1016/j.engfailanal.2008.06.009 ↗
6. Experimental analysis and modeling of the crack arrest condition under severe plastic fretting fatigue conditions
7. A crack-growth arresting technique in aluminum alloy10.1016/j.engfailanal.2007.02.005 ↗
8. Application of indentation as a retardation mechanism for fatigue crack growth10.1016/j.ijfatigue.2011.09.012 ↗
9. Toughening of epoxy adhesives by combined interaction of carbon nanotubes and silsesquioxanes
10. Crack stopping in composite adhesively bonded joints through corrugation10.1016/j.tafmec.2015.10.003 ↗
11. Cracking stopping in the bondline of adhesively bonded composite adherents by means of a mechanical fastener: numerical and experimental investigation10.4271/2015-01-2611 ↗
12. Analytical and experimental studies on delamination arrest features in aircraft composite structures
13. Disbond-stopping concepts for bonded composite joints
14. Fiber-reinforcement-based crack arrester for composite bonded joints
15. Review of Z-pinned composite laminates10.1016/j.compositesa.2007.08.016 ↗
16. Tensile strength and fatigue properties of Z-pinned composite lap joints
17. Cartié · 2000
18. Improving the mode I delamination fatigue resistance of composites using Z-pins10.1016/j.compscitech.2013.12.009 ↗
19. Comparative study of the mode I and mode II delamination fatigue properties of Z-pinned aircraft composites10.1016/j.matdes.2014.08.072 ↗
20. Mixed-mode I/II delamination fatigue strengthening of polymer composites using z-pins10.1016/j.compositesb.2017.05.016 ↗
21. Electrical-based delamination crack monitoring in composites using Z-pins10.1016/j.compositesa.2017.10.025 ↗
22. An experimental investigation into multi-functional Z-pinned composite laminates10.1016/j.matdes.2016.07.035 ↗
23. On the delamination self-sensing function of Z-pinned composite laminates10.1016/j.compscitech.2016.03.019 ↗
24. Bonding of CFRP primary aerospace structures – crackstopping in composite bonded joints under fatigue