Analysis of the presence of bonding defects on the fracture behavior of a damaged plate repaired by composite patch

Abstract

The repair technique has presented its effectiveness in the reduction of the stresses at the level of stresses concentration areas. The search for a patch and suitable adhesive for a good transfer of load has pushed researchers to develop many ideas, which relate the form, the nature, the stacking sequence of the patch and the adhesive type to give a better combination of choice between the patch and the adhesive. Our work fits in this context; the objective is to analyze by the method of finite elements the behavior in the rupture of a damaged plate in the presence of defect of bonding. The analysis of J-Integral and stresses in the tow substrates adhesive and patch shows clearly that their values depends strongly on the position of the default essentially when it's located close to the free edge of the free edge of the adhesive or the crack.

Numerical Analysis of the Mechanical Behavior on the Effect of the Geometric Interface of the Aluminum/Aluminum Plate Assembly

“…The adhesive layer was modeled in the form of a third layer in order to introduce its real mechanical properties through its traction curve. This three-layer modeling technique has been used by several authors (Elhannani et al, 2015, Kaddouri et al, 2019, Medjdoub et al,2022.…”

Analysis of the performance of carbon fiber patches on improving the failure strength of a damaged and repaired plate

“…The evaluation of the stress intensity factor (SIF) or the J-integral, and the different stresses in the substrates, adhesive, or respective interfaces, makes it possible to estimate the effectiveness and the durability of the repair [8]. Most of the studies undertaken in this eld are focused on the composite repair of cracked panels under the in uence of mode I loading [11] [12]. However, in practical applications, the components of cracked panels are subjected to mixed-mode loading, and pure-mode I analysis has limited practical interest [13] [14].…”