Online Stress Measurement During Laser-aided Metallic Additive Manufacturing

Abstract In situ measurement of residual stress is a challenge, and it is a source of many defects during additive manufacturing (AM). Usually, postmortem measurement is too late to save the product once a defect appears. Most of the existing technologies are predictive simulations and postmortem an...

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Autores principales:	Yi Lu, Guifang Sun, Xianfeng Xiao, Jyoti Mazumder
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e826f2db3d1a431eba7057ddca103cfc
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spelling	oai:doaj.org-article:e826f2db3d1a431eba7057ddca103cfc2021-12-02T15:09:30ZOnline Stress Measurement During Laser-aided Metallic Additive Manufacturing10.1038/s41598-019-39849-02045-2322https://doaj.org/article/e826f2db3d1a431eba7057ddca103cfc2019-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-39849-0https://doaj.org/toc/2045-2322Abstract In situ measurement of residual stress is a challenge, and it is a source of many defects during additive manufacturing (AM). Usually, postmortem measurement is too late to save the product once a defect appears. Most of the existing technologies are predictive simulations and postmortem analysis. However, these technologies cannot directly reflect the stress evolution during the fabrication process. This paper introduces a computer vision-based stress monitoring system combined with finite element method (FEM) technology to estimate the stress development inside of the deposition layer. The system uses a CCD camera and a line laser beam to measure the height of the melt pool and solidified layer, forms a real-time FEM model, and uses the surface displacement between the two states to calculate the stress development during the solidification process. The results show that there is no obvious shape change after solidification. The shape of the melt pool and its solid state is similar. The stress distribution obtained through online monitoring is similar to that from the traditional thermal-stress simulation.Yi LuGuifang SunXianfeng XiaoJyoti MazumderNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-11 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yi Lu Guifang Sun Xianfeng Xiao Jyoti Mazumder Online Stress Measurement During Laser-aided Metallic Additive Manufacturing
description	Abstract In situ measurement of residual stress is a challenge, and it is a source of many defects during additive manufacturing (AM). Usually, postmortem measurement is too late to save the product once a defect appears. Most of the existing technologies are predictive simulations and postmortem analysis. However, these technologies cannot directly reflect the stress evolution during the fabrication process. This paper introduces a computer vision-based stress monitoring system combined with finite element method (FEM) technology to estimate the stress development inside of the deposition layer. The system uses a CCD camera and a line laser beam to measure the height of the melt pool and solidified layer, forms a real-time FEM model, and uses the surface displacement between the two states to calculate the stress development during the solidification process. The results show that there is no obvious shape change after solidification. The shape of the melt pool and its solid state is similar. The stress distribution obtained through online monitoring is similar to that from the traditional thermal-stress simulation.
format	article
author	Yi Lu Guifang Sun Xianfeng Xiao Jyoti Mazumder
author_facet	Yi Lu Guifang Sun Xianfeng Xiao Jyoti Mazumder
author_sort	Yi Lu
title	Online Stress Measurement During Laser-aided Metallic Additive Manufacturing
title_short	Online Stress Measurement During Laser-aided Metallic Additive Manufacturing
title_full	Online Stress Measurement During Laser-aided Metallic Additive Manufacturing
title_fullStr	Online Stress Measurement During Laser-aided Metallic Additive Manufacturing
title_full_unstemmed	Online Stress Measurement During Laser-aided Metallic Additive Manufacturing
title_sort	online stress measurement during laser-aided metallic additive manufacturing
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/e826f2db3d1a431eba7057ddca103cfc
work_keys_str_mv	AT yilu onlinestressmeasurementduringlaseraidedmetallicadditivemanufacturing AT guifangsun onlinestressmeasurementduringlaseraidedmetallicadditivemanufacturing AT xianfengxiao onlinestressmeasurementduringlaseraidedmetallicadditivemanufacturing AT jyotimazumder onlinestressmeasurementduringlaseraidedmetallicadditivemanufacturing
_version_	1718387849384951808

Online Stress Measurement During Laser-aided Metallic Additive Manufacturing

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