Numerical estimation of the mass gain between double symmetric and single bonded composite repairs in aircraft structures

Elliptical and circular bonded composite repair under mechanical and thermal loading in aircraft structures

“…This is because the patch carries the loads as the crack grows. Several investigators announced this tendency 6,11,20,22 . It can also noted, according to the results of Figure 3 that the semi-circular shape of patch presents lower values of the stress intensity factor at the crack tip.…”

“…With the increase in computational power, the use of the numerical method, especially the finite elements method, contributed considerably to the comprehension of the mechanical behavior of defects under patch repair. The finite element method has been used for the study of the crack patching by many authors, we can quote: Callinan et al 8 , Jones and Chiu 9 , Chung and Yang 10 and Bachir Bouiadjra et al 11 Many researchers have studied crack reinforcement of stiffeners or pre-stresses on the stress intensity factor at the cracks tip or notches by the optical method of caustics 12,13 . Papadopoulos and Konsta-Gdoutos 14 indicated that this method is simple in its application and has successfully been used for the solution of a host of crack problems of engineering importance.…”

Effect of the angles of the cracks of corroded plate in bonded composite repair

“…onded composite repairs of metallic structure have become a useful aircraft structural life extension solution over the last two decades. These repairs provide an efficient method for restoring the ultimate load capability of the structure [1]. Alan Baker [2,3] was the first otherwise the pioneer of these searches in the aeronautical and maritime research laboratory of the Royal Australian Air Force.…”

Elasto-plastic stress distributions in adhesively bonded double lap joints

“…He obtained an analytical solution for the distribution of shear stress in the joints. Numerical simulations of the adhesively bonded composite patch repair technique that used in aircraft industry have received a good deal of attention and a variety of references can be found in the literature [18][19][20][21].…”