Adhesively-bonded Patch Repair with Composites

  • P.C. Pandey Indian Institute of Science, Bangalore
  • S. Kumar Indian Institute of Science, Bangalore
Keywords: Three-dimensional finite elements, adhesively-bonded composite-patch repair, structure life extension, geometric and material nonlinearity


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.

Defence Science Journal, 2010, 60(3), pp.320-329, DOI:

Author Biographies

P.C. Pandey, Indian Institute of Science, Bangalore
Professor, IISc, Bangalore. His research interests include: linear and nonlinear FEM, strain space plasticity, continuum damage mechanics, FRP composites, adhesively-bonded joints and integrated force method.
S. Kumar, Indian Institute of Science, Bangalore
His research interests include: multiscale modelling, constitutive modelling, computational mechanics, bonded joints and computational materials science.
How to Cite
Pandey, P., & Kumar, S. (2010). Adhesively-bonded Patch Repair with Composites. Defence Science Journal, 60(3), 320-329.
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