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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Belinha, J.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (22/22 displayed)
- 2023Analysis of Lattices Based on TPMS for Bone Scaffold
- 2022A bio-inspired remodelling algorithm combined with a natural neighbour meshless method to obtain optimized functionally graded materialscitations
- 2021The Radial Point Interpolation Method in the Bending Analysis Of Symmetric Laminates Using HSDTS
- 2021A meshless study of antisymmetric angle-ply laminates using high-order shear deformation theoriescitations
- 2021The influence of infill density gradient on the mechanical properties of PLA optimized structures by additive manufacturingcitations
- 2021The bending behaviour of antisymmetric cross-ply laminates using high-order shear deformation theories and a Radial Point Interpolation Methodcitations
- 2021Homogenizing the Elastic Properties of Composite Material Using the NNRPIM
- 2021Numerical analysis of honeycomb-shaped polymeric foams using the FEM and the RPIMcitations
- 2021Using a radial point interpolation meshless method and the finite element method for application of a bio-inspired remodelling algorithm in the design of optimized bone scaffoldcitations
- 2021Simulation of the viscoplastic extrusion process using the radial point interpolation meshless methodcitations
- 2020Analysis of antisymmetric cross-ply laminates using high-order shear deformation theories: a meshless approachcitations
- 2020The numerical analysis of symmetric cross-ply laminates using the natural neighbour radial point interpolation method and high-order shear deformation theoriescitations
- 2018The analysis of composite laminated beams using a 2D interpolating meshless techniquecitations
- 2018Simulating fracture propagation in brittle materials using a meshless approachcitations
- 2017Aluminum foam sandwich with adhesive bonding: Computational modelingcitations
- 2017The computational analysis of composite laminates: Meshless formulation
- 2016Vibration analysis of laminated soft core sandwich plates with piezoelectric sensors and actuatorscitations
- 2016The analysis of laminated plates using distinct advanced discretization meshless techniquescitations
- 2013Composite laminated plate analysis using the natural radial element methodcitations
- 2010Composite Laminated Plates: A 3D Natural Neighbor Radial Point Interpolation Method Approachcitations
- 2010A 3D shell-like approach using a natural neighbour meshless method: Isotropic and orthotropic thin structurescitations
- 2007Nonlinear analysis of plates and laminates using the element free Galerkin methodcitations
Places of action
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article
The influence of infill density gradient on the mechanical properties of PLA optimized structures by additive manufacturing
Abstract
The aim of this work is the development of a novel framework for structural optimization using bio-inspired remodelling algorithm adapted to additive manufacturing. The fact that polylactic acid (PLA, E = 3145 MPa (Young's modulus) according to the supplier for parts obtained by injection) shows a similar parameterized behavior with ductile metals, in the sense that both materials are characterized by a bi-linear elastic-plastic law, allows to simulate and prototype parts to be further constructed in ductile metals at a lower cost and then be produced with more expensive fabrication processes. Moreover, cellular materials allow for a significant weight reduction and therefore reduction of production costs. Structural optimization algorithms based on biological phenomena were used to determine the density distribution of the infill density of the specimens. Several simple structures were submitted to distinct complex load cases and analyzed using the mentioned optimization algorithms combined with the finite element method and a meshless method. The surface was divided according to similar density and then converted to stereolitography files and infilled with the gyroid structure at the desired density determined before, using open-source slicing software. Smoothing functions were used to smooth the density field obtained with the remodeling algorithms. The samples were printed with fused filament fabrication technology and submitted to mechanical flexural tests similar to the ones analyzed analytically, namely three- and four-point bending tests. Thus, the factors of analysis were the smoothing parameter and the remodeling method, and the responses evaluated were stiffness, specific stiffness, maximum force, and mass. The experimental results correlated (obtaining accuracy of 35% for the three-point bending load case and 5% for the four-point bending load case) to the numerical results in terms of flexural stiffness and it was found that the complexity of the load case is relevant for the efficiency of the functional gradient. The fused filament fabrication process is still not accurate enough to be able to experimentally compare the results based of finite element method and meshless method analyses.