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http://dx.doi.org/10.12989/scs.2014.17.2.199

Damage of scarf-repaired composite laminates subjected to low-velocity impacts  

Cheng, Xiaoquan (School of Aeronautical Science and Engineering, Beihang University)
Zhao, Wenyi (School of Aeronautical Science and Engineering, Beihang University)
Liu, Shufeng (School of Aeronautical Science and Engineering, Beihang University)
Xu, Yunyan (School of Aeronautical Science and Engineering, Beihang University)
Bao, Jianwen (Beijing Institute of Aeronautical Materials)
Publication Information
Steel and Composite Structures / v.17, no.2, 2014 , pp. 199-213 More about this Journal
Abstract
The damage characters of scarf repaired composite laminates subjected to low-velocity impact with various energy levels at different locations are studied experimentally. The results are compared with those of the original laminates which have no initial damage and don't need repair. The impact load-time history of the specimens, the velocity-time curves of the impactor, the post impact compressive strength of the specimens and the C-scan photographs of the damaged regions are obtained. The delamination threshold load and damage character of the specimen section at impact point are also studied. The results have shown that the impact response of a repaired composite laminate is sensitive to the location of the impact. The impact load and the delamination threshold load have shown different characters for specimens with different impact locations. The debonding characters of the adhesive and compressive strength after impact of the specimens are also influenced by impact locations.
Keywords
composite laminates; scarf-repair; low-velocity impact; damage; compressive strength;
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  • Reference
1 Falzon, B.G. (2009), "Impact damage and repair of composite structures", Aeronaut. J., 113(1145), 431-445.   DOI
2 Harman, A.B. (2006), "Optimisation and improvement of the design of scarf repairs to aircraft", Ph.D. Dissertation, University of New South Wales, Sydney, Australia.
3 Harman, A.B. and Rider, A.N. (2011), "Impact damage tolerance of composite repairs to highly-loaded, high temperature composite structures", Compos. Part A - Appl. S. Manuf., 42(10), 1321-1334.   DOI   ScienceOn
4 Harman, A.B. and Wang, C.H. (2007), "Damage tolerance and impact resistance of composite scarf joints", Proceedings of the 16th International Conference on Composite Materials (ICCM-16), Kyoto, Japan, July.
5 Herszberg, I., Feih, S., Gunnion, A.J. and Li, H.C. (2007), "Impact damage tolerance of tension loaded bonded scarf repairs to CFRP laminates", Proceedings of the 16th International Conference on Composite Materials (ICCM-16), Tokyo, Japan, July.
6 Hoshi, H., Nakano, K. and Iwahori, Y. (2007), "Study on repair of CFRP laminates for aircraft structures", Proceedings of the 16th International Conference on Composite Materials (ICCM-16), Tokyo, Japan, July.
7 Kumar, S.B., Sivashanker, S., Bag, A. and Sridhar, I. (2005), "Failure of aerospace composite scarf-joints subjected to uniaxial compression", Mater. Sci. Eng.: A, 412(1), 117-122.   DOI   ScienceOn
8 Kumar, S.B., Sridhar, I., Sivashanker, S., Osiyemi, S.O. and Bag, A. (2006), "Tensile failure of adhesively bonded CFRP composite scarf joints", Mater. Sci. Eng.: B, 132(1), 113-120.   DOI   ScienceOn
9 Abrate, S. (1991), "Impact on laminated composite materials", Appl. Mech. Rev., 44(4), 155-190.   DOI
10 ASTM D7136/D7136M-07 (2007), "Measuring the damage resistance of a fiber-reinforced polymer matrix composite to a drop-weight impact event", American Society for Testing Materials.
11 Cheng, X.Q., Kou, C.H. and Li, Z.N. (1998), "Compression of composite honeycomb core sandwich panels after low velocity impact", J. Beijing Univ. Aeron. Astron., 24(5), 551-554.
12 Schoeppner, G.A. and Abrate, S. (2000), "Delamination threshold loads for low velocity impact on composite laminates", Compos. Part A - Appl. S. Manuf., 31(9), 903-915.   DOI   ScienceOn
13 Takahashi, I., Ito, Y., Takeda, S., Iwahori, Y., Takatsubo, J. and Takeda, N. (2007), "Impact damage detection on scarf-repaired composites using Lamb wave sensing", Proceedings of the 16th International Conference on Materials (ICCM-16), Kyoto, Japan, July.
14 ASTM D7137/D7137M-07 (2007), "Compressive residual strength properties of damaged polymer matrix composite plates", American Society for Testing Materials.
15 Baker, A.A. (1999), "Scarf repairs to highly strained graphite/epoxy structure", Int. J. Adhes. Adhes., 19(2), 161-171.   DOI   ScienceOn
16 Cheng, X.Q., Zhang, Z.L. and Wu, X.R. (2002), "Post-impact compressive strength of small composite laminate specimens", Acta Materiae Compositae Sinica, 19(6), 8-12.
17 Cheng, X.Q., Ali, A.M. and Li, Z.N. (2009), "Residual strength of stitched laminates after low velocity impact", J. Reinf. Plast. Compos., 28(14), 1670-1688.
18 Abrate, S. (1994), "Impact on laminated composites: recent advances", Appl. Mech. Rev., 47(11), 517-544.   DOI
19 Wang, C.H. and Gunnion, A.J. (2008), "On the design methodology of scarf repairs to composite laminates", Compos. Sci. Technol., 68(1), 35-46.   DOI   ScienceOn