Print Email Facebook Twitter Damage resistance of dispersed-ply laminates Title Damage resistance of dispersed-ply laminates Author Sardar Abadi, P.M. Jeliazkov, M. Sebaey, T.A. Lopes, C.S. Abdalla, M.M. Peeters, D.M.J. Faculty Aerospace Engineering Department Aerospace Structures & Materials Date 2015-07-19 Abstract This paper presents the design procedure of a quasi-isotropic (QI) laminate employing dispersion of ply orientations. The goal is to improve damage resistance of a laminate under low velocity impact (LVI). The LVI is treated as a quasi-static loading and instead of a plate a laminated beam is considered. Therefore, this situation simplifies the problem to an interlaminar shear (ILS) test. Although the specimen might experience several failure mechanism, only delamination which influence the load carrying capability of it drastically under compression after impact (CAI) is considered here. By studying the interlaminar shear stresses through the thickness of the laminate, initiation of crack can be inspected in every layer using a quadratic initiation criterion (QIC). Finally, employing a modified ant colony optimization (ACO) algorithm (two-pheromone ACO algorithm) a fully dispersed QI laminate is designed. The domain of the orientation angles is between -85º to 90º with a 5º interval. The results showed that the interface angles does not present a decisive influence on the crack onset. On the other hand, the dispersion tends to have as large as possible angles near the middle of the laminate to minimize the maximum value of QIC, and some small angles in the outside to provide enough bending stiffness. Subject damage resistancedispersed-ply laminatesoptimizationant colony algorithm To reference this document use: http://resolver.tudelft.nl/uuid:8a736606-a00c-4618-9955-1ec44d87471e Publisher ICCM Source ICCM 20: 20th International Conference on Composite Materials, Copenhagen, Denmark, 19-24 July 2015 Part of collection Institutional Repository Document type conference paper Rights (c) 2015 The Author(s) Files PDF 321091.pdf 686.55 KB Close viewer /islandora/object/uuid:8a736606-a00c-4618-9955-1ec44d87471e/datastream/OBJ/view