Differentiable simulation for material thermal response design in additive manufacturing processes

Article Engineering, Industrial

Multi-energy source (MES) configuration for bead shape control in wire-based directed energy deposition (w-DED)

Guangyu Chen et al.

Summary: The study on the use of the multi-energy source method for wire-based directed energy deposition demonstrated independent control of layer width and height. By adjusting wire feed speed and laser scanning width, the shape and size of the bead were successfully controlled. Experimental results showed the significance of the multi-energy source method for wire-based directed energy deposition.

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY (2022)

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Article Engineering, Manufacturing

Modeling, analysis, and optimization of dimensional accuracy of FDM-fabricated parts using definitive screening design and deep learning feedforward artificial neural network

Omar Ahmed Mohamed et al.

Summary: This study explores the effects of FDM fabrication conditions on the dimensional accuracy of cylindrical parts through the integration of second-order DSD and ANN experimental design techniques. Results show significant impacts of variables such as slice thickness, part print direction, and number of perimeters on length difference percentage, as well as raster-to-raster air gap, bead width, number of perimeters, and part print direction on diameter difference percentage. The study suggests that this integrated approach is a promising methodology for AM applications.

ADVANCES IN MANUFACTURING (2021)

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Article Engineering, Industrial

Mechanical properties of hybrid additively manufactured Inconel 718 parts created via thermal control after secondary treatment processes

Jennifer Glerum et al.

Summary: The study on INCONEL 718 manufactured via directed energy deposition revealed that solidification rate has a lasting effect on the material's mechanical properties, which is not completely mitigated by post-processing treatments. Post-solidus cooling rate effects disappear after secondary processes, with equivalent hardness observed in samples with different cooling times.

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY (2021)

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Article Robotics

Differentiable Simulation for Physical System Identification

Quentin Le Lidec et al.

Summary: The research proposes a more accurate algorithm for solving the problem of frictional contacts and introduces a differentiable simulator as well as an efficient method for computing the analytical derivatives of the optimization problems involved.

IEEE ROBOTICS AND AUTOMATION LETTERS (2021)

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Proceedings Paper Engineering, Manufacturing

Data-driven Design of Customized Porous Lattice Sole Fabricated by Additive Manufacturing

Yunlong Tang et al.

Summary: The paper presents a new design method to generate a fully customized porous shoe sole that can significantly reduce peak plantar pressure and further minimize it by varying strut diameters.

49TH SME NORTH AMERICAN MANUFACTURING RESEARCH CONFERENCE (NAMRC 49, 2021) (2021)

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Proceedings Paper Automation & Control Systems

NeuralSim: Augmenting Differentiable Simulators with Neural Networks

Eric Heiden et al.

Summary: Differentiable simulators offer a way to close the gap between simulation and reality by using efficient, gradient-based optimization algorithms. The augmentation of the novel differentiable physics engine with neural networks allows for learning nonlinear relationships and modeling effects not considered by traditional simulators. This hybrid simulation approach requires less data for training and shows improved generalization compared to entirely data-driven models.

2021 IEEE INTERNATIONAL CONFERENCE ON ROBOTICS AND AUTOMATION (ICRA 2021) (2021)

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Article Multidisciplinary Sciences