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Erschienen in: Experimental Mechanics 8/2021

09.07.2021 | Research paper

A Hybrid Method for the Online Evaluation of Stress Fields in Metal Additive Manufacturing

verfasst von: G. Z. Zeng, R. L. Zu, D. L. Wu, W. X. Shi, J. F. Zhou, J. Y. Zhao, Z. W. Liu, H. M. Xie, S. Liu

Erschienen in: Experimental Mechanics | Ausgabe 8/2021

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Abstract

Background

Metal additive manufacturing has extensive application prospects in the aerospace, precision instrument, and biomedical fields, etc. However, the low manufacturing quality of key components is a bottleneck restricting the further development and application of this technology. Because of the extremely complex manufacturing environment, a real-time and online monitoring technology for the manufacturing quality remains lacking.

Objective

For laser engineered net shaping (LENS), a mainstream technology of metal additive manufacturing, a hybrid method for the online evaluation of stress fields during laser cladding is developed in this paper that combines the real-time measured temperature field, three-dimensional deformation field and finite element method.

Methods

The proposed method first designed the synchronous measurement optical paths of the temperature field and three-dimensional deformation field of the substrate, and the positions of the temperature and deformation field images were matched. A finite element model was established based on the printing parameters such as the layer thickness and printing speed, and the temperature field and three-dimensional deformation field synchronously measured at each moment were incorporated into the model as boundary conditions to obtain the deformation and stress information inside the model.

Results

We compared the stress field obtained at the end of printing with the XRD (X-ray diffraction) measurement results to verify the effectiveness of the proposed method. The proposed method can obtain the three-dimensional stress distribution and evolution of the substrate and printed component.

Conclusion

The proposed method can realize the online characterization of the three-dimensional stress field in the LENS printing process and provide important experimental guidance and data for the quality control of 3D printing.

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Literatur
4.
Zurück zum Zitat Lipson H (2013) Fabricated: The new world of 3D printing. John Wiley & Sons Lipson H (2013) Fabricated: The new world of 3D printing. John Wiley & Sons
Metadaten
Titel
A Hybrid Method for the Online Evaluation of Stress Fields in Metal Additive Manufacturing
verfasst von
G. Z. Zeng
R. L. Zu
D. L. Wu
W. X. Shi
J. F. Zhou
J. Y. Zhao
Z. W. Liu
H. M. Xie
S. Liu
Publikationsdatum
09.07.2021
Verlag
Springer US
Erschienen in
Experimental Mechanics / Ausgabe 8/2021
Print ISSN: 0014-4851
Elektronische ISSN: 1741-2765
DOI
https://doi.org/10.1007/s11340-021-00735-4

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