Print Email Facebook Twitter Low-velocity impact on fibre-metal laminates Title Low-velocity impact on fibre-metal laminates Author Moriniere, F.D. Contributor Benedictus, R. (promotor) Alderliesten, R.C. (promotor) Faculty Aerospace Engineering Department Mechanics, Aerospace Structures & Materials Date 2014-01-17 Abstract Generating high-energy absorbing FML concepts is challenging because aluminium and composite failure mechanisms are acting concurrently during the impact process. Because the impact process involves energy transformation, an analytical energy balance method was used to assess the contribution of the material constituents in the low-velocity impact energy absorption. The energy approach was combined with a structural approach using the Classical Laminate Theory. This theory covers out-of-plane deformation cases that can be used for impact studies. Corresponding to this out-of-plane displacement, strain energy was balanced with the energy due to delamination to obtain the absorbed energy. The generic quasi-static energy balance model predicted accurately the low-velocity impact behaviour of FMLs under large mass. The theoretical energy partition among the material constituents was revealed to substantiate firm conclusions on the impact resistance of FMLs. The excellent impact resistance of FMLs is not only due to the increasing strength of glass composites when loaded at higher strain rates. The inner composite plies absorb a minor portion of the impact energy and they direct the impact load in the plate's plane. The outer metal layers limit the extent of delamination and undergo large global displacement before fracture. Due to the generic nature of the developed approach, it was possible to implement minor modifications to predict the low-velocity impact behaviour of an FML-based sandwich structure. Subject fibre-metal laminatelow-velocity impactgeneric modelenergy balance To reference this document use: https://doi.org/10.4233/uuid:022e1a88-f48e-493e-805e-014f396a05dc ISBN 9789088917905 Part of collection Institutional Repository Document type doctoral thesis Rights (c) 2014 Moriniere, F.D. Files PDF PhD_Thesis_Freddy_Moriniere.pdf 30.53 MB Close viewer /islandora/object/uuid:022e1a88-f48e-493e-805e-014f396a05dc/datastream/OBJ/view