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    Finite Element Analysis of Impact-Induced Damage in Pressurized Hybrid Composites Pipes
    (World Scientific Publ Co Pte Ltd, 2021) Maziz, Ammar; Tarfaoui, Mostapha; Rechak, Said; Nachtane, Mourad; Gemi, Lokman
    The high mechanical performance of filament wound hybrid composite pipes can be adversely affected by their low resistance to accidental impact. Loads of dynamic origin are dangerous and cause consequences on the operation of pipes because the damage is often not detected and can affect the structural integrity of composite pipes. In this work, a finite element (FE) model of pressurized hybrid composite pipe is developed and performed to predict the damage initiation and evolution under low-velocity impact through simulations with ABAQUS/Explicit. Hashin's failure theory is used as failure criterion. At the first stage, load-time histories, and impactor displacement time limits are estimated in an FE model. The numerical results are confronted with the experimental values published in the literature. Once the model was validated, damage initiation and propagation were analyzed, where it is observed that damage mainly occurs by matrix cracking, damage evolution in the matrix in tension, compression and shear are presented and discussed in detail.
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    A progressive damage model for pressurized filament-wound hybrid composite pipe under low-velocity impact
    (Elsevier Sci Ltd, 2021) Maziz, Ammar; Tarfaoui, Mostapha; Gemi, Lokman; Rechak, Said; Nachtane, Mourad
    Pressurized hybrid composite pipe structures, produced by filament wound subjected to impact loads, were numerically investigated. A combined 3D-FE Model based on the use of interlaminar and intralaminar damage models is established. Intralaminar damages such as matrix cracking and fibre failures are predicted using 3D Hashin criteria, whereas interlaminar damage (delamination) was evaluated using cohesive zone elements. The damage model was coded and implemented as a user-defined material subroutine (VUMAT) for Abaqus/Explicit. Numerical results in the form of contact force, displacement and energy dissipated compare well with the experimental results. Predicted matrix damage in each cross-ply of hybrid composite pipe and delamination onset were also presented in this paper. The ability of this new 3D model to simulate the damage evolution in the full-scale pressurized hybrid composite pipe under low-velocity impact events were demonstrated throughout comparison with existing experimental results published.