2025-06-112025-06-112025-08Sánchez-Carmona, S., Barroso Caro, A. y Correa Montoto, E. (2025). Influence of the 90/0 ply thickness ratio on the stresses associated with the edge effect phenomenon. Composites Part A: Applied Science and Manufacturing, 195, 108961. https://doi.org/10.1016/j.compositesa.2025.108961.1359-835X1878-5840https://hdl.handle.net/11441/174172The scale effect phenomenon has shed light on the thermo-mechanical behaviour of ultra-thin plies. These laminas in cross-ply laminates (under certain 90/0 thickness ratios) have given rise to a relevant edge effect phenomenon, causing significant through-the-thickness stress in the weakest ply along its free edge under both thermal and (0-longitudinal tension) mechanical loading. Thus, a biaxial stress state must be considered to analyse what happens along the free edges from experimental samples to structural components, such as drill holes. A parametric numerical analysis is performed taking three different features into account: the thickness of the ply blocks, the cross-ply stacking sequences and the type of fibre, either carbon or glass. The numerical predictions are in accordance with experimental results, which are obtained under a thermal cooldown. The biaxial stress state predictions could be used in future numerical procedures including the presence of components’ free edges.application/pdf12 p.engAttribution-NonCommercial 4.0 Internationalhttp://creativecommons.org/licenses/by-nc/4.0/Scale effectFree edgeCarbon and glass fibresCross-ply laminateinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccesshttps://doi.org/10.1016/j.compositesa.2025.108961