Abstract Multi-stiffener composite panels are the primary components widely used in aircraft structures such as fuselage, wing box, and rear bulkhead, but they typically sensitive to compressive load-induced buckling thin-walled nature of these components. This paper presents a numerical experimental study on failure behaviour multi-stiffener panels. A progressive damage model based Hashin’s cr...

A wide variety of adhesive joints architectures is available, offering several options to the designers, although most common are single-lap (SLJ), double-lap joints, and scarf joints. Additional designs, less used studied stepped-lap, T-joints tubular find application in different types industry, such as aircraft bond stiffeners skin cars between B-pillar rocker. This work numerically evaluate...

Ring-stiffened flat bottom tanks are widely used in many industries for the storage of liquids, such as oil, fertilizers, water, sewage and sludge. Material efficiency is achieved by combining thin plates with ring-stiffeners. When bin covered a dome or cone roof, high meridional forces due to live snow loads may trigger axial buckling shell. Ring stiffeners beneficial, not just against wind, b...

In this paper we develop a new simple and effective isogeometric analysis for modeling thermal buckling of stiffened laminated composite plates with cutouts using level sets. We employ first order shear deformation theory to approximate the displacement field stiffeners plate. Numerical treatment trimmed objects, such as internal in terms NURBS-based presents several challenges, primarily due n...

This paper describes a new approach for reducing the number of the fitness and constraint function evaluations required by a genetic algorithm (GA) for optimization problems with mixed continuous and discrete design variables. The proposed additions to the GA make the search more effective and rapidly improve the fitness value from generation to generation. The additions involve memory as a fun...