期刊
COMPUTERS & MATHEMATICS WITH APPLICATIONS
卷 78, 期 7, 页码 2407-2416出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.camwa.2018.08.016
关键词
Additive manufacturing; Simulation; Mechanical layer equivalent method; Residual stress; Experimental validation; X-ray measurement
资金
- ESA Future Launcher Preparatory Program (ESA FLPP)
A challenge in the additive manufacturing process of laser beam melting of metals is the formation of residual stresses, which can cause large part deformations, when the part is released, lower the application range concerning tensile loads and provoke cracks. Due to the complexity and the interaction of different process parameters, the use of experimental studies for investigation is tedious and costly. An effective approach to analyze the effects is the numerical process simulation based on the method of finite elements. In this paper, the recently developed method of Mechanical Layer Equivalent for fast calculations of process induced distortions in laser beam melting is used to analyze the residual stresses during laser beam melting. For this purpose, small test samples have been generated additively and residual stresses have been measured by X-ray diffraction and compared to simulated values. The results show that despite the simplifications the model inhibits reliable prediction of residual stresses can be achieved. (C) 2018 Elsevier Ltd. All rights reserved.
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