Adhesively-bonded Patch Repair with Composites

Abstract

Adhesively-bonded composite patch repairs over cracked or corrosion-damaged metallic aircraft structures have shown great promise for extending life of ageing structures. This study presents the numerical investigation into the interface behaviour of adhesively-bonded cracked aluminum alloy substrate patched with fibre-reinforced composite material. The adhesive is modelled as an elasto-plastic bilinear material to characterise the debond behaviour, while the defective substrate is regarded as linear elastic continuum. Two typical patch shapes were selected based on information available in the literature. Geometric and material nonlinear analyses for square and octagonal patches were performed to capture peel and shear stresses developed between the substrate and the patch to examine the possibility of interface delamination/debonding. Parametric studies on adhesive thickness and patch thickness were carried out to predict their infuence on damage tolerance of repaired structures.

Kompozit Yamalar ile Tamir Edilen Hasarlı Kompozit Plakaların Düşük Hızlı Darbe Davranışı

“…The determining other issues are that choosing the suitable patch for the damaged materials, measuring the strength of the damaged materials after applying the patch. The 49 researches about composite materials increase and they are used by basis and auxiliary material in the most of the recent applications (Çalışkan et al, 2017, Maamar et al, 2015, Pandey and Kumar, 2010, Kwon and Hall, 2015, Coelho et al, 2017, Deng et al, 2017. Impact response of material may depend on its application area and aim.…”

Charpy Impact Response of the Cracked Aluminum Plates Repaired with FML Patches using the Response Surface Methodology

“…Pandey and Kumar 12 showed that composite patch repairs of cracked metallic aircraft structures extend their life. They presented the numerical calculation into the interface behavior of repaired aluminum alloy plates patched by fiber composites.…”

Fatigue behavior of thick center cracked aluminum plates repaired by two-sided composite patching

“…Adhesively-bonded composite patch repair over cracked or corrosion-damaged metallic aircraft structures has shown great promise for extending life of aging structures [1][2][3][4][5][6]. Due to the existence of the bonded patches, the stress concentration of the damaged areas is greatly improved [7][8][9].…”