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An Experimental Study on the Tensile Behavior of the Cracked Aluminum Plates Repaired with FML Composite Patches

Authors: A. Pourkamali Anaraki, G. H. Payganeh, F. Ashena ghasemi, A. Fallah


Repairing of the cracks by fiber metal laminates (FMLs) was first done by some aeronautical laboratories in early 1970s. In this study, experimental investigations were done on the effect of repairing the center-cracked aluminum plates using the FML patches. The repairing processes were conducted to characterize the response of the repaired structures to tensile tests. The composite patches were made of one aluminum layer and two woven glassepoxy composite layers. Three different crack lengths in three crack angles and different patch lay-ups were examined. It was observed for the lengthen cracks, the effect of increasing the crack angle on ultimate tensile load in the structure was increase. It was indicated that the situation of metal layer in the FML patches had an important effect on the tensile response of the tested specimens. It was found when the aluminum layer is farther, the ultimate tensile load has the highest amount.

Keywords: Crack, Composite patch repair, Fiber metal laminate (FML), Patch Lay-up, Repair surface, Ultimate load

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[1] R.Y. Qin, H.P. Schreiber, Adhesion at partially restructured polymer surfaces, Colloids Surf. A: Physicochem. Eng. Aspects 156 (1999) 85-93.
[2] Vlot A. Historical overview. In: Fibre metal laminates; an introduction.Dordrecht: Kluwer Academic Publishers; 2001.
[3] GuocaiWu, Yang. Jenn-Ming, Journal of Metals 57 (1) (2005) 72-79.
[4] M. Hagenbeek, C. Van Hengel, O.J. Bosker, C.A.J.R. Vermeeren, Applied Composite Materials 10 (2003) 207-222.
[5] J.J. Homan, International Journal of Fatigue 28 (4) (2006) 366-374.
[6] Po-Yu Chang, Jenn-Ming Yang, et al., Fatigue and Fracture of Engineering Materials and Structures 30 (2007) 158-1171.
[7] Po-Yu Chang, Po-Ching Yeh, Jenn-Ming Yang, (2008) Static behavior of notched and un-notched fiber metal laminates with hybrid boron/glass fibers, Submitted to Modeling and Simulation in Materials Science and Engineering
[8] Clearfield HM, McNamara DK, Davis GD. In: Brinson HF, Brinson HF, editors. Engineered materials handbook, Vol. 3. Adhesives and sealants. ASM International; 1990. p. 260.
[9] A. Chukwujekwu Okafor, Navdeep Singh, U.E. Enemuoh, S.V. Rao, Design, analysis and performance of adhesively bonded composite patch repair of cracked aluminum aircraft panels Composite Structures 71 (2005) 258-270
[10] ASTM D 2651, -American Society for Testing and Materials (ASTM), West Consnohocken, USA, 1995 Standard Guide for Preparation of Metal Surfaces for Adhesive Bonding.
[11] Huntsman Advanced materials data sheet for Araldite LY5052-1 /Aradure 5052-1, materials, 2007.
[12] Advanced materials data sheet for Araldite 2015, materials.
[13] Wegman RF. Surface preparation techniques for adhesive bonding. William Andrew Inc. NOYES PUBLICATION; 1989.