Experimental Study of the Effects of Rectangular and H-Shaped Woven Nanocomposites Patch on tensile properties of Repaired AL5251 Sheets

Abstract

Crack nucleation and propagation in engineering segments and structures are unavoidable. Replacing a damaged part is the easiest way to prevent failure, but it is not always cost-effective. Therefore, in many cases, by repairing a component, the life of defective working parts can be increased. One of the effective strategies, is mending the cracked area using composite patches which are glued in crack formation place. The purpose of this study was to investigate the effect of patch on crack growth behavior as well as the effects of patch geometry on the mechanical properties of repaired Al5251 aluminum alloy. For this purpose, a Kevlar-epoxy composite patch with rectangular and H-shaped geometry has been used. Tensile test was performed to evaluate the mechanical properties and the crack growth behavior in the samples. The influences of effective area and geometry shape of the patch on the maximum tensile force applicable, specimen ductility, toughness and crack forming force have been investigated. The results showed that with the use of composite patch, ductility, force at the moment of cracking and the failure force increased compared to samples without repair. Also, comparison of patches with equal effective area showed that samples repaired with H-shaped patch have more load capacity than rectangular patch. In addition, the amount of toughness in the sample repaired with H-shaped patch has increased. Experimental Study of the Effects of Rectangular and H-Shaped Woven Nano- composites Patch on tensile properties of [1] Fatigue crack propagation studies on aluminum panels... [2] Advances in the bonded composite repair of metallic aircraft structure. [3] Design, analysis and performance of adhesively bonded composite patch repair of cracked aluminum aircraft panels. [4] Analysis of the plastic zone size ahead of repaired cracks... [5] Modified couple stress theory and finite strain assumption … [6] Failure analysis of unidirectional polymeric matrix composites with two serial pin loaded-holes. [7] Analytical study of a pin-loaded hole in unidirectional laminated composites... [8] Fatigue analysis of cracked thick aluminum plate bonded with composite patches. [9] Thermo-magneto-mechanical long-term creep behavior... [10] Agglomeration effects on the vibrations of CNTs/fiber/polymer/metal hybrid laminates cylindrical shell. [11] Repairing cracked aluminum plates by aluminum patch using diffusion method. [12] Successive 3D FE analysis technique for characterization of fatigue crack growth... [13] Experimental and numerical study of the fatigue behaviour … [14] Effects of curing thermal residual stresses on fatigue crack propagation of aluminum plates repaired by FML patches. [15] Acoustic emission characterization of a notched aluminum plate... [16] Experimental analysis of tensile strength of lateral notched aluminum plates... [17] An experimental study on the tensile behavior of the cracked aluminum plates... [18] Fatigue Analysis of Pre-cracked Aluminium Alloy Thin Sheets Repaired with a CFRP Patch at Elevated Temperature. [19] Comparison of SCC behaviour of crack in thin aluminium structure ... [20] Optimization of composite patch repair for center-cracked rectangular plate using design of experiments method. [21] Analysis of Crack Propagation by Bonded Composite for Different Patch Shapes Repairs in Marine Structures. [22] Comparison between rectangular and trapezoidal bonded composite repairs in aircraft structures. [23] Fatigue crack growth in aluminum panels repaired with different shapes of single-sided composite patches. [24] Optimisation of the sizes of bonded composite repair in aircraft structures. [25] Design, analysis and performance of adhesively