Assessing the application of Hi-Lok® fasteners for the repair of open-hole and delaminated CFRP
Source abstract
Abstract
Abstract This research investigates the potential of applying low-cost Hi-Lok® fasteners as a temporary repair method for delamination damaged CFRP. Impact testing was performed on CFRP T800S/3900-2B coupons at three impact energy levels (5 J, 10 J and 20 J). The strength and failure strain of delaminated, open hole and delaminated fastened (Hi-Lok®) specimens were then measured and compared using quasi-static testing in tension and compression. Digital Image Correlation (DIC) was used to support strain gauge measurements and analyse the stress distribution in undamaged filled-hole specimens. In compression the fastener was shown to increase the coupon strength and failure strain when compared to damaged and open-hole specimens for all energy levels. Numerical simulations using the implicit method within LS-DYNA 971 highlight the importance of hole tolerance and contact between the Hi-Lok® fastener and coupon. The simulation results showed close agreement to theoretical stress distributions and the stress–strain response of experiments in tension and compression.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Mechanical Behavior of Composites · Structural Response to Dynamic Loads · Ultrasonics and Acoustic Wave Propagation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (25)
Show source-provided references
1. Meeting the challenge of aviation emissions: an aircraft industry perspective10.1080/09537320802557327 ↗
2. Boeing: 787 Dreamliner program fact sheet. [last accessed: December 2013].
3. Boeing: Current market outlook 2013–2032, [last accessed: December 2013].
4. Bonded repair of composite aircraft structures: a review of scientific challenges and opportunities10.1016/j.paerosci.2013.03.003 ↗
5. Composite World: In-situ composite repair builds on basics, [last accessed: December 2013].
6. ASTM Standard D5766/D5766M-11: standard test method for open-hole tensile strength of polymer matrix composite laminates. ASTM International, West Conshohocken, PA; 2011 http://dx.doi.org/10.1520/D5766_D5766M-11.10.1520/D5766_D5766M-11 ↗
7. ASTM Standard D6484/D6484M-09: standard test method for open-hole compressive strength of polymer matrix composite laminates. ASTM International, West Conshohocken, PA; 2009 http://dx.doi.org/10.1520/D6484_D6484M-09.10.1520/D6484_D6484M-09 ↗
8. Failure mechanisms in compression-loaded composite laminates containing open and filled holes10.1177/073168449901801805 ↗
9. ASTM Standard D6742/D6742M-12: standard practice for filled-hole compressive testing of polymer matrix composite laminates. ASTM International, West Conshohocken, PA; 2012 http://dx.doi.org/10.1520/D6742_D6742M-12.10.1520/D6742_D6742M-12 ↗
10. Bearing strength behaviour of clearance fit fastener holes in toughened graphite/epoxy laminates
11. Bolt-hole clearance effects and strength criteria in single bolt, single lap, composite joints10.1016/S0266-3538(02)00088-X ↗
12. The strength of bolted joints in multi-directional CFRP laminates10.1016/0010-4361(77)90027-1 ↗
13. Experimental study on clamping effects on the tensile strength of composite plates with a bolt-filled hole10.1016/S1359-835X(99)00002-0 ↗
14. Hi-Shear Corporation, Fastening Systems Installation Instructions, Torance, CA 90509 US; 1991.
15. McCallum S, Hoshi H, Iwahori Y, Sugimoto S. Arrest fastener repair of delaminated CFRP. In: Proceedings of SAMPE. Nagoya, Japan; November, 2013. p. 1–6.
16. Kirsch G, VDI, vol. 42, 1898; described in Timoshenko & Goodier, op. cit.
17. LS-DYNA MAT54 modeling of the axial crushing of a composite tape sinusoidal specimen10.1016/j.compositesa.2011.08.004 ↗
18. Nonlinear behaviour and compressive strength of unidirectional and multidirectional carbon fiber composite laminates10.1016/j.compositesa.2005.12.004 ↗
19. JAXA Advanced Composite Materials Database (ACDB), [last accessed: September 2013].
20. Testing method for compression after impact properties of carbon fibre reinforced plastics, JIS K7089; 1996.
21. Davidson BD. On modeling the residual strength of impact damaged compression loaded laminates. In: Proceedings of SAMPE. Atlantic City, NJ, USA; 1989. p. 109–19.
22. Investigation of impact damage in multi-directional tape laminates and its effect on local tensile stiffness10.1016/j.compscitech.2008.05.008 ↗
23. LS-PrePost 4.0 and LS-DYNA 971. Livermore Software Technology Corporation [last accessed: December 2013].
24. Wade B, Feraboli P, Osborne M. Simulating laminated composites using LS-DYNA material model MAT54 part I: [0] and [90] ply single-element investigation. FAA Joint Advanced Materials and Structures (JAMS) Centre of Excellence, Technical Review Meeting, Maryland; 2012.
25. Nonlinear compressive stiffness in impacted composite laminates determined by an inverse method10.1016/j.compositesa.2008.12.002 ↗