Akademik Veri Yönetim Sistemi
Engineering Fracture Mechanics, cilt.327, 2025 (SCI-Expanded, Scopus)
Delamination and debonding are critical failure modes in composite structures, requiring precise assessment of their progression and extent. A fast and reliable method for analysing fatigue-induced delamination is necessary to evaluate the propagation of interlaminar defects. Current literature predominantly limits progressive failure studies to the coupon scale because of lengthy computation times and convergence difficulties. A widely adopted approach to address these challenges is the global–local method. Although global–local methods are commonly used in progressive damage computations, they are generally restricted to static analyses. Therefore, there is a notable gap in the literature regarding global–local methods developed explicitly for progressive fatigue damage modelling. The study aims to propose an accurate and computationally cheaper global–local methodology for analysing the progression of fatigue-induced interlaminar damage for composite structures. As a result, it presents a new procedure for performing comprehensive fatigue delamination analyses using a two-way coupling global–local method. This study presents the results of analysing the Double Cantilever Beam (DCB) model using this method, comparing them with traditional methodologies and experimental data to validate the proposed approach. The validated method is then applied to a T-Joint, an element-level aerospace structure. The method shows consistent results with conventional analyses and experimental findings. Additionally, in 3D models with finer local mesh, this method offers a significant computational advantage over standard analyses. Therefore, this method offers computationally cheaper progressive interlaminar fatigue-induced damage analyses.