Abstract
A digital twin is an image of the reality. In case of a digital twin for additively manufactured components by the use of selective laser melting and Inconel®718 issues as microstructure , anisotropy and load history are discussed. In order to take the main influences on the cyclic material behavior into account, local stresses and strains of a structure element are introduced. Furthermore, this new interpretation of the local load properties enables a two-stage combined macroscopic and microscopic material image as the basis for a digital twin for the fatigue assessment of additively manufactured components.
Keywords
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- b:
-
fatigue strength exponent
- c:
-
fatigue ductility exponent
- E:
-
Young’s modulus
- I:
-
Index of the fatigue regime, section of the tri-linear strain–life curve
- K’:
-
Cyclic hardening coefficient
- n’:
-
Cyclic hardening exponent
- Ni:
-
Number of cycles to crack initiation
- \( \upvarepsilon_{\text{f}}^{{\prime }} \) :
-
Fatigue ductility coefficient
- \( \upsigma_{\text{f}}^{{\prime }} \) :
-
Fatigue strength coefficient
- X, Y, Z:
-
Directions linked to the process direction
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Acknowledgements
The research and development project ‘BadgeB’ that form the basis for this publication is funded within the scope of the “Additive Fertigung—Individualisierte Produkte, komplexe Massenprodukte, innovative Materialien” by the Federal Ministry of education and Research and managed by the KIT project management agency “Projekträger Karlsruhe—Produktion und Fertigungstechnologien”. The authors are responsible for the content of this publication.
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© 2019 The Minerals, Metals & Materials Society
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Wagener, R., Scurria, M., Bein, T. (2019). About a Digital Twin for the Fatigue Approach of Additively Manufactured Components. In: TMS 2019 148th Annual Meeting & Exhibition Supplemental Proceedings. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-05861-6_34
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DOI: https://doi.org/10.1007/978-3-030-05861-6_34
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