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52   MATERIALS                                                                    NOV/DEC 2024 FDM ASIA | www.fdmasia.com






         Freerange Stock                                     chosen beforehand which means that further improvements
                                                             can be added for future models and experimental campaigns.
                                                                These parameters are related to the properties of the
                                                             wood material (type of wood, density, modulus of elasticity),

                                                             dimensions and then the discretisation of the model.
                                                                The results obtained herein indicate that in the case of
                                                             beam models, larger cross-section sizes and spans will benefit
                                                             even more from the topological optimisation.
                                                                Also, the topological optimisation task can be improved to
                                                             take into account the lamellar structure of glulam and optimise
                                                             the element such that the final geometry could rather be
                                                             obtained by placing the correctly cut lamella inside the element
          Intelligence model is carried out based on numerical modelling   without having to do a CNC machining step for the element.

          using FEM analysis of a number of glued laminated wood   Future  developments  will  need  to  account  for  larger
          samples and laboratory testing to confirm the correctness   structural element sizes (cross-sections and span) and also
          of the material model.                             take into account different loading conditions such as unevenly
            The training of the AI model involves the use of bent   distributed loads or point loads.
          glulam beams characterised by a series of variable parameters,   Also, it is clear that a great step in developing machine
          obtaining a large number of topologically optimised models/  learning applications for this kind of task is to deploy
          datasets (pairs of synthetic parameters—displacements). These   a generative  adversarial  network  architecture that  can

          models were used for ANN training and for the validation of   eventually propose geometries that can then be optimised
          the result.                                        in fewer steps.
            A deep neural network model is proposed herein with   Besides, from this experiment we also found that
          the goal of testing whether or not a useful alignment can be   topological optimisation tasks usually require a large number
          obtained from machine learning techniques for this kind of   of iterations in order to reach the design goals. Therefore,
          problem and this kind of optimisation task.        embedding  this  information  into  machine  learning  models
            The ANN network obtained can indicate based on the   for  structural  elements  belonging  to  the  same  topological
          problem data a measure of the stiffness of a topologically   groups will result in a faster design process since certain
          optimised beam in order to be able to identify whether such   aspects regarding structural behavior such as strength and

          optimisation will produce satisfactory results from a design   stiffness can be quickly estimated using Artificial Intelligence
          point of view.                                     techniques.
            The resulting neural network can be used as it is for the   Topologically optimised geometry propositions could be
          task mentioned in the present work, being properly sized as   obtained by employing generative machine learning model
          to avoid overfitting issues.                       techniques which can propose geometries that are closer to
            Further iteration on this neural network will be developed   the topologically optimised results using FEM and as such
          in order to improve the architecture in terms of size and   present a starting point for the design analysis in a reduced

          activation function for the task previously mentioned.   amount of time.  FDM
            The models proposed for this paper follow certain parameters                        ENQUIRY NO. 6301
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