Finite element analysis-enabled optimization of process parameters in additive manufacturing

A design optimization framework is proposed for process parameters in additive manufacturing. A finite element approximation of the coupled thermomechanical model is used to simulate the fused deposition of heated material and compute the objective function for each analysis. Both gradient-based and...

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Bibliographic Details
Published in:Finite elements in analysis and design Vol. 244; p. 104282
Main Authors: Wang, Jingyi, Papadopoulos, Panayiotis
Format: Journal Article
Language:English
Published: Elsevier B.V 01.02.2025
Subjects:
Additive manufacturing
Bayesian optimization
Finite element method
Gradient-descent optimization
Method of local variations
Sensitivity
Finite element method
Gradient-descent optimization
Sensitivity
Additive manufacturing
Bayesian optimization
Method of local variations
ISSN:0168-874X
Online Access:Get full text
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Summary:A design optimization framework is proposed for process parameters in additive manufacturing. A finite element approximation of the coupled thermomechanical model is used to simulate the fused deposition of heated material and compute the objective function for each analysis. Both gradient-based and gradient-free optimization methods are developed. The gradient-based approach, which results in a balance law-constrained optimization problem, requires sensitivities computed from the fully discretized finite element model. These sensitivities are derived and subsequently applied to a projected gradient-descent algorithm. For the gradient-free approach, two distinct algorithms are proposed: a search algorithm based on local variations and a Bayesian optimization algorithm using a Gaussian process. Two design optimization examples are considered in order to illustrate the effectiveness of these approaches and explore the range of their usefulness. •Fully-coupled thermomechanical modeling of additive manufacturing.•Optimization of process parameters enabled by finite element analysis.•Gradient-based and gradient-free approaches for optimization of process parameters.•Shape optimization for printed parts subject to cooling.•Simulation of two-dimensional printing involving curved domains.
ISSN:0168-874X
DOI:10.1016/j.finel.2024.104282