Influence of adhesive properties on tensile behavior of scarf repaired laminates

Tensile failure behavior of scarf repaired composite laminates was studied with non-linear three dimensional finite element modeling. The finite element method (FEM) results are in good agreement with the testing results, which verifies the established model validity. Based on it, the tensile strength of scarf repaired laminates was calculated and the failure mechanism was analyzed. The influence of mechanical properties of the adhesives on the tensile behavior of scarf repaired composite laminates was studied. Finally, the principle of adhesive materials choosing for a scarf repaired composite laminate and the ideal adhesive's characters were concluded. The results can provide references for the repairable design of composite structures, as well as the research and development on adhesive materials for scarf repaired composites with butt joints.