Modeling, analysis, and optimization of dimensional accuracy of FDM-fabricated parts using defi nitive screening design and deep learning feedforward artifi cial neural network

doi:10.1007/s40436-020-00336-9

Abstract

Abstract: Additive manufacturing (AM) technologies such as fused deposition modeling (FDM) rely on the quality of manufactured products and the process capability. Currently, the dimensional accuracy and stability of any AM process is essential for ensuring that customer specifications are satisfied at the highest standard, and variations are controlled without significantly affecting the functioning of processes, machines, and product structures. This study aims to investigate the effects of FDM fabrication conditions on the dimensional accuracy of cylindrical parts. In this study, a new class of experimental design techniques for integrated second-order definitive screening design (DSD) and an artificial neural network (ANN) are proposed for designing experiments to evaluate and predict the effects of six important operating variables. By determining the optimum fabrication conditions to obtain better dimensional accuracies for cylindrical parts, the time consumption and number of complex experiments are reduced considerably in this study. The optimum fabrication conditions generated through a second-order DSD are verified with experimental measurements. The results indicate that the slice thickness, part print direction, and number of perimeters significantly affect the percentage of length difference, whereas the percentage of diameter difference is significantly affected by the raster-to-raster air gap, bead width, number of perimeters, and part print direction. Furthermore, the results demonstrate that a second-order DSD integrated with an ANN is a more attractive and promising methodology for AM applications.

The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-020-00336-9

Key words: Artificial neural network (ANN), Optimization, Definitive screening design (DSD), Analysis of variance (ANOVA), Fused deposition modeling (FDM), Dimensional accuracy

Omar Ahmed Mohamed, Syed Hasan Masood, Jahar Lal Bhowmik. Modeling, analysis, and optimization of dimensional accuracy of FDM-fabricated parts using defi nitive screening design and deep learning feedforward artifi cial neural network[J]. Advances in Manufacturing, 2021, 9(1): 115-129.

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