THE EFFECTS OF ELECTRIC-THERMAL LOAD ON THE SHEAR PROPERTYOF THE CFRP SINGLE-LAP JOINT AFTER REPAIR

Abstract

Abstract: Carbon fiber resin matrix composite material is widely applied in the field of aviation. It has become the norm of the aircraft structural repair. The electric-thermal load was studied in the paper and was performed on the CFRP single-lap joint after wet lay up repair. The surface temperature field of single-lap joint and the resistance of sample were measured by the self-devised damage test device. The change rules of temperature and resistance under different current applications have been investigated. The scanning electron microscope was used to analyze the changes of surface morphology after shear failure. It demonstrated that shear strength slight increases under low electric current since post curing of resin. Higher current application has a detrimental effect on the properties of the joint. Shear strength decreases under higher electric currents since high temperature can induce interfacial damage of joint.

Key words: CFRP repair, single-lap joint, electric-thermal load, shear strength

CLC Number:

TB332

ZHU Chen, ZHANG Jun, LU Peng-cheng, WANG Tao. THE EFFECTS OF ELECTRIC-THERMAL LOAD ON THE SHEAR PROPERTYOF THE CFRP SINGLE-LAP JOINT AFTER REPAIR[J]. Fiber Reinforced Plastics/Composites, 2016, 0(4): 21-25.

References

[1] Cui H P, Wen W D, Cui H T. An integrated method for predicting damage and residual tensile strength of composite laminates under low velocity impact[J].Computers & Structures, 2009, 87(7-8):456-466.
[2] Sabina Alessi, Giuseppe Pitarresi, Giuseppe Spadaro. Effect of hydrothermal ageing on the thermal and delamination fracture behaviour of CFRP composites[J]. Composites Part B: Engineering, 2014, 67: 145-153.
[3] Chemartin L, Lalande P, Peyrou B, et al. Direct effects of lightning on aircraft structure: analysis of the thermal, electrical and mechanical constraints[J]. Journal of Aerospace Lab, 2012, 21(5): 1-15.
[4] Hirano Y, Katsumata S, Iwahori Y, et al. Artificial lightning testing on graphite/epoxy composite laminate[J]. Composites Part A: Applied Science and Manufacturing, 2010, 41(10): 1461-1470.
[5] Suvarna R, Arumugam V, Bull D J, et al. Effect of temperature on low velocity impact damage and post-impact flexural strength of CFRP assessed using ultrasonic c-scan and micro-focus computed tomography[J]. Composites Part B: Engineering, 2014, 66: 58-64.
[6] Klemperer C J, Maharaj D. Composite electromagnetic interference shielding materials for aerospace applications[J]. Composite Structures, 2009, 91(4): 467-472.
[7] Sierakowski R L, Telitcheve I Y, Zhupanska O I. On the impact response of electrified carbon fiber polymer matrix composites: effects of electric current intensity and duration[J]. Composites Science and Technology, 2008, 68(3-4): 639-649.
[8] Feraboli P, Miller M. Damage resistance and tolerance of carbon epoxy composite coupons subjected to simulated lightning strike[J]. Composites: Part A, 2009, 40(6-7): 954-967.
[9] Kawakami H, Feraboli P. Lighting strike damage resistance and tolerance of scarf-repaired mesh-protected carbon fiber composites[J]. Composites: Part A, 2011, 42(9): 1247-1262.
[10] Hirano Y, Katsumata S, Yutaka Iwahori, et al. Artificial lightning testing on graphite epoxy composite laminate[J]. Composites: Part A, 2010, 41(10): 1461-1470.
[11] Gigliottia M, Lafarie-Frenot M C, Grandidier J C. Development of experimental and modelling tools for the characterisation of the thermal-electro-mechanical behaviour of composite materials for aircraft applications[J]. M?ecanique&Industries, 2011, 12(2): 87-101.
[12] Zantout A E, Zhupanska O I. On the electrical resistance of carbon fiber polymer matrix composites[J]. Composites: Part A, 2010, 41: 1719-1727.
[13] Zhupanska O I, Sierakowski R L. Electro-thermo-mechanical coupling in carbon fiber polymer matrix composites[J]. Acta Mech, 2011, 218: 319-332.
[14] Zhupanska O I, Sierakowski R L. Effects of an electromagnetic field on the mechanical response of composites[J]. J Comp Mater, 2007, 41: 633-651.
[15] Snyder D R, Sierakowski R L, Chenette E R, et al. Preliminary assessment of electro-thermo-magnetically loaded composite panel impact resistance/crack propagation with high speed digital laser photography [C]. Sendai: Society of Photo-Optical Instrumentation Engineers, 2001. 488.